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Quantification and assessment of the error associated with engineering stress-strain analysis in stress accelerated creep tests in 316H stainless steel Mater. High Temp. (IF 1.3) Pub Date : 2024-03-15 J. De Andres, M. D. Jones, C. M. Davies
Historically, reduction of area has been neglected during uniaxial creep tests, and engineering rather than true stress-strain and strain rate have been considered. In high load accelerated tests, ...
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Thermal impact on superplasticizer-free metakaolin-nano-silica binary and ternary mortars Mater. High Temp. (IF 1.3) Pub Date : 2024-03-14 Abhilash P P, Rajesh Kumar, Veerendra Kumar, Praveen Patel, Vidya Menon
Binary and ternary blended mortars were prepared by replacing ordinary Portland cement with varying percentages of MK (10%, 15%, 20%) and NS (1.5%, 3%, 4.5%) to study their performance under elevat...
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Crack tunnelling analysis of P91 steel under creep-fatigue loading with various force ratios and hold times at 600 ºC Mater. High Temp. (IF 1.3) Pub Date : 2024-03-09 Challa Krishna Teja, Kiranchand G R, Chitresh Chandra, M. Nani Babu, N. Narasaiah
The advent of non-conventional and renewable energy sources places a tremendous strain on generic sources of power generation, which have been historically conceived and designed for constant-load ...
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Effect of Cr on the high-temperature corrosion of dissimilar AISI 904L and Inconel 625 joints employed in the coal-fired thermal power plant tubes Mater. High Temp. (IF 1.3) Pub Date : 2024-03-11 S. Senthur Prabu, S. M. Muthu, S. Sujai, K. Devendranath Ramkumar, D. T. Arunkumar, N. Beemkumar
The hot corrosion behaviours of 5-mm-thick plates of dissimilar AISI 904L and Inconel 625 weldments produced by continuous current gas tungsten arc welding process using Ni-Cr-Mo-enriched filler wi...
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Creep-fatigue life estimation of circumferential welds in thermal high energy piping systems Mater. High Temp. (IF 1.3) Pub Date : 2024-03-09 Isamu Nonaka
To prevent accidents in high energy piping systems of thermal power plants, it may be important to accurately estimate the creep-fatigue life of circumferential piping welds. The main failure mode ...
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Investigation on tribological behaviour of copper-free composite friction material under dry sliding at high-temperature Mater. High Temp. (IF 1.3) Pub Date : 2024-03-08 Ashish Saurabh, Abhinav Manoj, Sunil Kumar Tiwari, Prabakaran Saravanan, Piyush Chandra Verma
This research uses a rotary pin-on-disc tribometer to explore the friction and wear behaviour of a copper-free semi-metallic friction composite over various operating temperatures, 25 °C, 150 °C, 2...
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Thermal creep properties of virgin and irradiated cladding tubes made of Ti-stabilised DIN 1.4970 (15-15Ti) austenitic stainless steel Mater. High Temp. (IF 1.3) Pub Date : 2024-03-06 Stefan Holmström, Remi Delville, Dmitry Terentyev
This paper presents assessments performed on a large database of virgin material and irradiated material thermal creep data from uniaxial and pressurised DIN 1.4970 Ti-stabilised austenitic stainle...
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The recent progress in the design of structural strength and life assessment for aero-engine single crystal turbine blades Mater. High Temp. (IF 1.3) Pub Date : 2024-03-05 Zhufeng Yue
The improvement of aero-engine performance still strongly relies on the innovation design of the single crystal turbine blades. As the single crystal blades evolve from the solid type to the double...
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Prediction of ‘effective’ corrosion rates by in-situ internal pressure creep testing in LBE for Ti-stabilised DIN 1.4970 (15-15Ti) austenitic stainless steel cladding tubes Mater. High Temp. (IF 1.3) Pub Date : 2024-03-05 S. Holmström, E. Stergar, S. Gavrilov, V. Tsisar, J. Joris, E. Lopes Maia
In this paper, a new high-temperature methodology for determining the ‘effective’ corrosion rates of internal pressure-tested cladding tubes, based on the reduced creep failure times under exposure...
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Quantitative physical modeling of the effect of precipitates in the subgrain interior on the creep curve and service life of P91 Mater. High Temp. (IF 1.3) Pub Date : 2024-02-27 L. Witzmann, J. Mergl, F. Riedlsperger, B. Krenmayr, G. Zuderstorfer, B. Sonderegger
This work deals with a physically based creep model of the martensitic 9% Cr-steel P91. In particular, we quantitatively study the effect of precipitates located in the subgrain interior on the cre...
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Some important considerations in creep modelling of ferritic steels and nickel-based superalloys Mater. High Temp. (IF 1.3) Pub Date : 2024-02-26 Ramkumar Oruganti
Trends in life with respect to stress can vary significantly based on the form of the chosen Arrhenius equation, and this in turn is fundamentally influenced by the nature of the rate controlling m...
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Evaluation of metallurgical risk factors in post-test, advanced 9% Cr creep strength enhanced ferritic (CSEF) steel Mater. High Temp. (IF 1.3) Pub Date : 2024-02-26 X. Zhang, S. Robertson, S. Hogg, MARK A.E. Jepson
About 9 wt.% Cr steels are widely used in the design and fabrication of thick section components in combined cycle or coal-fired applications for working temperatures of 600 ~ 650°C. This family of...
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Type IV cracking of P92 steel welded joint used in China power plants Mater. High Temp. (IF 1.3) Pub Date : 2024-02-23 J. Li, K. Gao, C. Che, X.Z. Chen, X.W. Liao, Y. Xiang
P92 (9Cr-1.8W–0.5Mo-NbV) martensite steel is widely used in high-temperature pipes of ultra-supercritical boilers in China. During high-temperature operation, microstructural evolution of the heat ...
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Interaction and superposition of creep damage and high-cycle fatigue of coarse-grained nickel-base alloy 247 Mater. High Temp. (IF 1.3) Pub Date : 2024-02-04 O. Jordan, T.D. Nguyen, P. Lion, T. Beck
The cast coarse-grained polycrystalline Alloy 247 is investigated, which is typically used in the rear turbine blades of land-based gas turbines. High rotational speeds up to 10,000 rpm in combinat...
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Effect of cyclic overload on deformation, crack growth behavior and crack initiation/growth lives of a C(T) specimen for 12Cr steel under creep-fatigue condition Mater. High Temp. (IF 1.3) Pub Date : 2024-01-16 Go Ozeki, Toshimitsu Yokobori Jr., Daisuke Kobayashi
In this study, using a C(T) specimen for 12Cr steel used for a steam turbine rotor, crack growth tests under creep-fatigue conditions with and without overloading were conducted and the fundamental...
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Creep life assessment of modified 9Cr-1Mo steel based on Monkman–Grant relationship considering temperature and stress dependences of strain required for rupture Mater. High Temp. (IF 1.3) Pub Date : 2024-01-16 Masatsugu Yaguchi
Regarding the application of the Monkman-Grant relationship to creep strength enhanced ferritic steels such as modified 9Cr-1Mo and 12Cr steels, there have been many reports showing that results te...
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Influence of heat treatment on the microstructure and creep response of additively manufactured cobalt superalloy Mar M509 Mater. High Temp. (IF 1.3) Pub Date : 2024-01-15 V. Kalyanasundaram, S.R. Holdsworth, Y. Pardhi, C Soothill, E. Hosseini
This work explores the influence of various post-build heat treatment procedures on the microstructural characteristics and creep response of laser powder bed fusion (L-PBF) Mar M509 superalloy. Be...
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High-temperature mechanical properties evaluation of 310S stainless steel Mater. High Temp. (IF 1.3) Pub Date : 2024-01-15 Jingwei Zhang, Zhicheng Li, Li Lin, Kanglin Liu
The high-temperature mechanical properties of 310S stainless steel were investigated by uniaxial tensile tests and small punch tests at the temperature from 20℃ to 600℃, and the relationship betwee...
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Practical application of an ultra-miniature creep test to the remaining creep-rupture life prediction using an iso–stress approach for in-service boiler piping of modified 9Cr-1Mo steel Mater. High Temp. (IF 1.3) Pub Date : 2024-01-15 Hirohide Nakatsuka, Chiaki Hisaka, Kazukiyo Takahashi, Akito Nitta, Masatsugu Yaguchi
A practical procedure for predicting the remaining creep-rupture life of in-service boiler pipes under their operating conditions is proposed and discussed in this study. Tests were conducted on a ...
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Study on creep characteristics and the isochronous stress–strain curve of Ni-Cr-Mo superalloy Mater. High Temp. (IF 1.3) Pub Date : 2024-01-15 Guangcheng Fan, Guangzhou Yuan, Wanxia Wang, Songlin Wang, Jianxiong Zhang, Yanyan Jia, Jiamin Wang, Yanling Lu
C276 superalloy is considered as a potential structural material for advanced nuclear reactor with good mechanical properties and corrosion resistance. High-temperature creep behaviour of C276 allo...
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Assessing the predictive performance of creep models using absolute rather than squared prediction errors: an application to 2.25Cr-1Mo steel and 316H stainless steel Mater. High Temp. (IF 1.3) Pub Date : 2024-01-15 Mark Evans
A reliable means of assessing the accuracy of a creep model’s predictions is fundamental to safe power plant operation. This paper introduces a method of decomposing the mean absolute prediction er...
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On the simulation of the small punch creep test—applied to 316L(N) austentic steels Mater. High Temp. (IF 1.3) Pub Date : 2024-01-02 K-F. Nilsson, D. Baraldi, S. Holmström, I. Simonovski
This paper describes a numerical analysis to predict the deformation and time to rupture of the small punch creep test for 316 L(N) austenitic steel. The constitutive model incorporates elasto-plas...
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Evolution and criteria for early creep damage Mater. High Temp. (IF 1.3) Pub Date : 2023-12-26 R. Pohja, S. Holmström, S. Khakalo, P. Auerkari, P. Vilaça
The life-limiting fitness for service of high-temperature components is of interest in design, fabrication and later assessments of remaining creep life. Of the associated indicators, strain reflec...
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Mechanical properties assessment of additively manufactured Ti64 alloy using small punch tests Mater. High Temp. (IF 1.3) Pub Date : 2023-12-19 Mathieu Lalé, Bernard Viguier
A study of the mechanical properties of Ti64 alloy through Small Punch Test is presented in this paper. The method and the validity of the correlation coefficients developed for nuclear steels are ...
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On the origin, physical basis and numerical stability of creep life equations Mater. High Temp. (IF 1.3) Pub Date : 2023-12-13 VITO Cedro III
In this paper several aspects of single line minimum creep rate and time to rupture models are examined that have not been discussed previously in the literature – the origin and boundary condition...
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Creep crack growth characterization of SS316LN Mater. High Temp. (IF 1.3) Pub Date : 2023-12-06 Awanish Kumar Mishra, Avinash Gopalan, Ritesh Gupta, NaniBabu M., Karthik V., Abhishek Tiwari
In creep conditions, conventionally, C* and C(t) line integrals are used for characterising the crack tip. However, the true crack driving force or its rate cannot be described by any of the conven...
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Extra-long creep rupture life of Alleima 3R60TM (316/316L) stainless steel Mater. High Temp. (IF 1.3) Pub Date : 2023-11-20 G. Chai, L. Lautrup, F. Gustavsson
Alleima 3R60TM is an AISI 316/316 L type of stainless steel. This alloy shows extra-long creep lives. At 700°C with an applied stress of 45 MPa, the specimen broke first after 240 131 hours, a 140%...
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Creep behaviour and microstructure evolution in Super 304H–P92 heterogeneous welds Mater. High Temp. (IF 1.3) Pub Date : 2023-11-18 Vlastimil Vodárek, Zdeněk Kuboň, Renáta Palupčíková, Kryštof Hradečný, Petra Váňová
The paper deals with results of long-term stress rupture tests on “cross-weld“ specimens made of Super 304 H – P92 heterogeneous welds. Stress rupture tests were carried out at temperatures of 625°...
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SEM and EDX analysis of erosion products formed on steam turbine blade Mater. High Temp. (IF 1.3) Pub Date : 2023-11-12 Pooja Rani, Atul Kumar Agrawal
Water droplet erosion (WDE), which is brought on by the high-energy impact of liquid water droplets, is a serious problem for steam turbine blades. Nevertheless, rather than addressing the WDE of a...
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Recent progress in the microstructurally based creep modelling of Ni-based alloy 617 Mater. High Temp. (IF 1.3) Pub Date : 2023-11-14 F. Riedlsperger, T. Wojcik, R. Buzolin, L. Witzmann, G. Zuderstorfer, B. Krenmayr, C. Sommitsch, B. Sonderegger
Solid solution strengthened (SSS) Ni-based superalloys, such as A617, show superior creep resistance at 700°C. Established for many years in land- and aero-based gas turbines, these materials are i...
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Creep rupture data assessment – new uncertain challenges require new uncertain answers Mater. High Temp. (IF 1.3) Pub Date : 2023-11-09 M. Schwienheer, F. Kolzow
For the service life calculation of high-temperature components the knowledge of the creep behaviour of the materials used remain essential. Over decades, many methods have been developed for extra...
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Development of a P91 uniaxial creep model for a wide stress range with an artificial neural network Mater. High Temp. (IF 1.3) Pub Date : 2023-11-08 D. Baraldi, K.-F Nilsson, S. Holmström, I. Simonovski
A uniaxial creep model that describes creep over a wide stress range was developed for P91 steel using an artificial neural network (ANN). The training dataset was based on measurements from uniaxi...
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Crystal plasticity model for creep and relaxation deformation of OFP copper Mater. High Temp. (IF 1.3) Pub Date : 2023-11-06 Tom. Andersson, Matti. Lindroos, Rami. Pohja, Abhishek. Biswas, Supriya. Nandy, Janne. Pakarinen, Juhani. Rantala
We demonstrate a dislocation density-based crystal plasticity (CP) model approach for simulating mesoscale deformation and damage. The existing CP framework is extended to be compatible with the ox...
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The effect of oxide scale and microstructural changes during cyclic hot corrosion on high-temperature tensile properties of Rene-80 superalloy Mater. High Temp. (IF 1.3) Pub Date : 2023-11-01 ARMAN Rabieifar, M. REZA Afshar, HAMIDREZA Najafi
The effect of oxide scale and microstructural changes during 10, 20, and 40 hot corrosion cycles on the high-temperature tensile properties of Rene-80 superalloy at 950 °C was investigated. Due to ...
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Simplicity, accuracy and confidence in predicting long-term rupture properties from short-term data: a study of four heats of 2.25Cr1Mo0.3V steel Mater. High Temp. (IF 1.3) Pub Date : 2023-11-01 John Bolton
Models of rupture data formulated recently by conventional methods for different heats of a 2.25Cr1Mo0.3 V pressure vessel steel are compared to models of the same data formulated by the P-NID (par...
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Creep, fatigue and creep-fatigue behaviour of martensitic/bainitic steels and nickel-based alloys and their welded joints at the temperature range 500°C–750°C Mater. High Temp. (IF 1.3) Pub Date : 2023-10-19 Daniel Osorio, Arianna Gotti, Florian Kauffmann, Andreas Klenk, Stefan Weihe
The aim of the paper is to investigate experimentally the fatigue and creep-fatigue material behaviour of improved materials and welded joints for the application in flexible future power plants. T...
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Steel grades 91 and 92 microstructure and precipitate evolution atlas and life assessment tool Mater. High Temp. (IF 1.3) Pub Date : 2023-10-12 A. Tonti, A. Alvino, A. Antonini, C. Delle Site, D. Lega, S. Matera, O. Tassa
P91 and P92 steels are widely used in power plants and petrochemical industry for long-term service components. Due to high resistance to creep, fatigue and corrosion, the use of grade 91 and grade...
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Uniform elongation measurements on creep specimens by a novel 3D-scanning system Mater. High Temp. (IF 1.3) Pub Date : 2023-10-09 C. Kontermann, A. Erbe, V. Knauthe, M. von Buelow, T.-U. Kern, M. Oechsner
The ductility of a material represents a very important value for both the classification and application of high-temperature alloys in real components. Commonly, different values have been defined...
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Long-term creep behaviours and structural stabilities of austenitic heat-resistant stainless steels Mater. High Temp. (IF 1.3) Pub Date : 2023-09-27 O. Öhlin, R. Siriki, G. Chai
For heat resistant alloys, long-term structural stability at high temperatures is a critical issue for alloy design and applications. In this paper, the long-term creep behaviours and structural st...
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Creep of IN738LC manufactured with laser powder bed fusion: effect of build orientation and twinning Mater. High Temp. (IF 1.3) Pub Date : 2023-09-25 Sandra Megahed, Karl Michael Krämer, Christoph Heinze, Christian Kontermann, Annett Udoh, Stefan Weihe, Matthias Oechsner
The microstructural anisotropy caused by the highly oriented solidification of the metal Laser Powder Bed Fusion (PBF-LB/M) process affects mechanical short- and long-term properties. Component bui...
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Effect of Re/Ru on constituents distribution and creep performance of nickel-based single crystal alloys Mater. High Temp. (IF 1.3) Pub Date : 2023-08-14 TIAN Songwen, SHU Delong, LIU Lirong, SUGUI Tian
The effects of Re/Re on the element distribution and creep performance of nickel-based single crystal alloy by using atom probe tomography (APT) and creeping property testing has been studied. Resu...
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A statistical microstructures-based method for the prediction of mechanical properties in nickel-based single crystal alloys Mater. High Temp. (IF 1.3) Pub Date : 2023-08-03 H.T. Li, X.M. Wang, Z.X. Li, H. Liu, S.Z. Qiao, Z.Y. Yv, K. Zhang, L. Li
ABSTRACT The γ/γ’ microstructure is a key factor for the mechanical performance of nickel-based single crystal superalloys. Experimental results have shown that the size and shape of the γ’ precipitates are not uniform and follow certain probability distributions. In order to study the effect of the microstructure on the mechanical behavior of the superalloys, a method is proposed to reproduce its
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Constitutive equations to correlate uniaxial creep behaviour vs stress and temperature for inconel 718 Mater. High Temp. (IF 1.3) Pub Date : 2023-07-26 ANTONIETTA Lo Conte
ABSTRACT The paper presents uniaxial creep tests conducted on Inconel 718 superalloy, reporting and describing the results obtained. The creep strain curves have been examined in different scenarios: by varying the initial applied stress, by varying the initial test temperature, and by considering the orientation of the specimens with respect to the direction of the material processing. Finally, ductility
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Degradation and failure of a novel double-layer LC/YSZ thermal barrier coating in a burner rig corrosion test Mater. High Temp. (IF 1.3) Pub Date : 2023-07-19 Y.X. Kang, Y. Bai, Y. Wang, X.L. Su
ABSTRACT Thermal barrier coatings (TBCs) are susceptible to corrosion by molten calcium-magnesium-aluminium-silicate (CMAS) during high temperature service. The microstructural evolution and thermal cycling lives of double-layer La2Ce2O7 (LC)/yttria partially stabilised zirconia (YSZ) and single-layer YSZ coatings were comparatively studied by a burner rig corrosion test. The results suggest that the
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Microscopy of oxidation 11 Mater. High Temp. (IF 1.3) Pub Date : 2023-06-11 Rebecca Higginson, Gordon Tatlock
Published in Materials at High Temperatures (Vol. 40, No. 4, 2023)
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Creep rupture lifetime evaluation and creep deformation analysis using θ-projection and Blackburn-type methods for forged Ti43Al5V4Nb Mater. High Temp. (IF 1.3) Pub Date : 2023-06-10 Noritake Hiyoshi, Yuuichi Saitou
The high-temperature creep properties of Ti43Al5V4Nb were investigated experimentally and analyzed numerically. Creep testing of forged Ti43Al5V4Nb at 650°C and 760°C was conducted to investigate t...
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Internal carburization and scale formation on austenitic steels in supercritical carbon dioxide Mater. High Temp. (IF 1.3) Pub Date : 2023-06-08 B. A. Pint, Y. F. Su, M. J. Lance, R. Pillai, J. R. Keiser
ABSTRACT Direct-fired supercritical CO2 (sCO2) power cycles are being commercialised to revolutionise fossil energy as a low-emission power source. To lower the cost of this technology, less expensive steels are needed in the lower temperature segments of the cycle. However, there are concerns about internal carburisation of steels in sCO2.11. This manuscript has been authored by UT-Battelle, LLC under
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Further investigations into alloy induced acidic fluxing Mater. High Temp. (IF 1.3) Pub Date : 2023-06-04 ANDREW Potter, JOY Sumner, NIGEL Simms
ABSTRACT Gas turbine materials often feature precipitates containing refractory metals to enhance their mechanical strength. This can make them susceptible to alloy-induced acidic fluxing whereby refractory elements increase the acidity of salt deposits. It is not clear to what degree degradation around alloy precipitates is caused by alloy-induced hot corrosion mechanisms, or the inability to develop
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Effects of salt and ash deposits on corrosion behaviour of Ni-25Cr in Ar-60CO2-20H2O gas at 650 oC Mater. High Temp. (IF 1.3) Pub Date : 2023-05-31 Yuchen Cai, Xuteng Xi, Jianqiang Zhang, Brian Gleeson, David J. Young
ABSTRACT A Ni-25Cr (wt.%) alloy coated with the salts and mixtures of these salts with an industrial coal ash was exposed to Ar-60CO2-20 H2O at 650 °C for 300 h. The alloy without any deposit developed a uniform internal oxidation zone (IOZ) and an external metallic nickel layer surmounted by a thin NiO scale. Salt deposits changed the scale constituents and morphology. Predominantly, a duplex scale
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An in situ liquid environment for synchrotron hard X-ray nanoprobe microscopy Mater. High Temp. (IF 1.3) Pub Date : 2023-05-17 Gea T. van de Kerkhof, Jessica M. Walker, Surabhi Agrawal, Stuart M. Clarke, Mobbassar H. Sk, Dominic J. Craske, Robert Lindsay, Michael Dowhyj, Ayomide Osundare, Manfred E. Schuster, Julia E. Parker
ABSTRACT Studying chemical reactions in an environment that closely mimics the system’s natural operating conditions can offer crucial insights into dynamic oxidation processes. Transmission Electron Microscopes (TEMs) and X-ray Nanoprobes allow the use of imaging and spectroscopy to access nanoscale chemical and structural information about these processes. However, the controlled operating conditions
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Effect of precipitation behaviour of μ phase and M23C6 carbide on microstructure and creep properties of DD5 single-crystal superalloy during long-term thermal exposure Mater. High Temp. (IF 1.3) Pub Date : 2023-05-08 Xudong Wang, Zhong Yang, Peisen Lv, Lirong Liu
ABSTRACT The effects of μ phase and M23C6 carbide on microstructure and creep properties of DD5 single-crystal superalloy during long-term thermal exposure at 1000°C were investigated in detail. It was found that during thermal exposure at 1000°C, the needle-like μ phase and granular M23C6 carbide were mainly precipitated in dendrite arm and interdendritic regions, respectively. The amount of precipitated
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Corrosion of Potential First Stage Blade Materials in Simulated Supercritical CO2 Mater. High Temp. (IF 1.3) Pub Date : 2023-05-04 Boma PHOEBE Norman, HISHAM Al Baroudi, ANDREW Potter, STEFANO Mori, NIGEL Simms, ANAND Kulkarni, JOY Sumner
ABSTRACT Global power consumption is predicted to double by 2050, notably driven by the transportation and energy sectors necessitating limitations of emissions. Due to its compact turbomachinery, better thermal efficiency, and simpler layout, supercritical-CO2 cycles have received attention, with numerous variations proposed (either indirect-fired/closed cycles or direct-fired-open cycles). One technical
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Effect of NaCl and SO2 on the stress corrosion cracking of CMSX-4 at 550°C Mater. High Temp. (IF 1.3) Pub Date : 2023-05-01 F. Duarte Martinez, A. Syed, K. Dawson, G. J. Tatlock, N.I. Morar, M. Kothari, C. Tang, J. Leggett, J.C. Mason-Flucke, G. Gibson, J.R. Nicholls, S. Gray, G.M. Castelluccio
ABSTRACT In the pursuit of more efficient gas turbine engines, components are required to operate for longer times at elevated temperatures. This increased time in service, together with a complex loading regime, can expose the material to environmental attack. This work has demonstrated that the interaction of stress, NaCl and a sulphur-containing environment is critical to cause crack initiation
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Characterization of Fe and Cr Dissolution and Reaction Product Formation in Molten Chloride Salts With and Without Impurities Mater. High Temp. (IF 1.3) Pub Date : 2023-05-01 B. A. Pint, Y.-F. Su, D. Sulejmanovic, R. Pillai
ABSTRACT There is considerable interest in molten chloride salts for several applications including thermal storage and next-generation molten salt reactors (MSRs). Several studies have concluded that Cl salts are highly corrosive to structural materials. Using Oak Ridge National Laboratory’s established methodology, Cl salt compatibility was assessed for candidate Ni-based alloys 230, 600 and 740 H
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Low cycle fatigue and creep–fatigue performance of 316SS formed by selective laser melting Mater. High Temp. (IF 1.3) Pub Date : 2023-05-01 Lingfeng Pan, Peishan Ding, Dezhou Kong, Lijun Liu, Xiaotao Zheng
ABSTRACT The fatigue and creep–fatigue properties of 316SS formed by selective laser melting (SLM) were investigated, considering the effects of different peak stresses, stress rates and peak-holding times on the ratcheting and creep-ratcheting behaviour of SLM 316 SS specimens at different sampling angles (0°, 90°) and high temperatures (550°C, 650°C, 750°C). Results show that the 90° specimens exhibited
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Study on the composition, microstructure and properties of new W-Al alloyed ethylene cracking furnace tube under 1100 ℃ carburising test conditions Mater. High Temp. (IF 1.3) Pub Date : 2023-04-27 Chunjiao Liu, Tao Chen, Zhigang Wu, Xinglei Wang, Heli Luo, Jiantao Wang
ABSTRACT The carburising tests were carried out at 1100 ℃ for 50 h, 100 h, 150 h and 200 h for a new type of tungsten-aluminium alloyed ethylene cracking furnace tube. The composition, microstructure transformation and performance of furnace tubes were analysed. The results showed that the average carbon content within 1 mm of the inner wall increased with the prolongation of carburising time. The
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High-temperature oxidation of Haynes 282 microtubes in CO2 Mater. High Temp. (IF 1.3) Pub Date : 2023-04-25 NARAYANAN Murali, ARIAN Ghazari, SHIQI Zheng, KAIYUAN Jin, TIMOTHY S. Fisher, NASR M. Ghoniem, XIAOCHUN Li
ABSTRACT The oxidation characteristics of Haynes 282 microtubes measuring 1 mm in diameter and 200 µm thick exposed to CO2 at elevated temperature are reported. After 215 hours at 700°C and 1 atm, a thin, protective chromia scale accumulates up to 2.03 µm from the outer surface, approximately 1% of the thickness, and internal aluminum oxidation is observed 2.59 µm from the inner surface. The results
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Creep behaviour of Q245R steel at 550 ℃ Mater. High Temp. (IF 1.3) Pub Date : 2023-04-11 Jinquan Guo, Chaozhongzheng Tang, Fang Wang, Kanglin Liu, Jingwei Zhang, Huan Sheng Lai
ABSTRACT Q245R steel has good heat and corrosion resistant and is used in various applications, such as reactors, regenerators, reformed gas steam generators, and other equipment. In this study, the creep behaviour of Q245R steel at the temperature of 550 ℃ is investigated. In addition to the modified Kachanov-Robotnov (K-R) method, the traditional and modified θ projection methods were employed to
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Creep ductility and modified Monkman-Grant equation for Gr.92 by incorporating total strain Mater. High Temp. (IF 1.3) Pub Date : 2023-04-03 FUJIO Abe
ABSTRACT A modified Monkman-Grant equation, which can provide a more accurate means of predicting creep rupture life than the standard Monkman-Grant formula, has been investigated for Gr.92 using creep data in the NIMS Creep Data Sheets at 550 to 750°C. The tr versus minimum creep rate ε˙min plot, which is called the Monkman-Grant relation, deviates downward at low stresses and long times. Better correlation
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Fabrication of Ni-Co film for enhancing the high-temperature corrosion resistance of interconnects in solid oxide fuel cells (SOFCs) Mater. High Temp. (IF 1.3) Pub Date : 2023-03-29 RUNGSAN Sriwilai, PIYAPONG Tongsong, JENNARONG Tungtrongpairoj, PATAMA Visuttipitukul, KATTAREEYA Taweesup
ABSTRACT Low-cost Ni-Co alloy coating was performed by electroplating technique to improve the high-temperature corrosion resistance of stainless steel interconnects in solid oxide fuel cells (SOFCs). The effect of plating on the surface morphology, microstructure and composition of Ni-Co alloys was investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD) and atomic force microscopy