当前位置: X-MOL 学术Mater. Corros. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Liquid lead–bismuth eutectic embrittlement effect on the tensile properties of T91 steel at 350°C
Materials and Corrosion ( IF 1.8 ) Pub Date : 2021-09-15 , DOI: 10.1002/maco.202112530
Jing Liu 1 , Zunqi Xiao 1 , Zhizhong Jiang 1 , Lin Luo 1
Affiliation  

The effects of pre-exposure and surface notch on the tensile properties of T91 steel in oxygen saturation lead–bismuth eutectic (LBE) have been investigated by slow strain rate tensile tests at 350°C with a strain rate of 1 × 10−5 s−1, and the reference tests were performed in Ar gas. The pre-exposure was conducted in liquid LBE at 500°C with an oxygen concentration of 10−8 wt% for 500 h. It is shown that the tensile properties of the nonpre-exposed specimens whether with or without a notch were not affected by LBE, but obvious liquid metal embrittlement (LME) was observed on the pre-exposure specimens. After being pre-exposed, the notched one was more prone to liquid LBE embrittlement compared to the unnotched specimen. Morphology similar to fatigue striations was observed on the fracture surface of the notched specimen with pre-exposure, which was probably attributed to the rapid growth of the crack. The results revealed that pre-exposure had a critical effect on LME, and surface notch intensified this phenomenon when pre-exposure was present.

中文翻译:

液态铅铋共晶脆化对T91钢350℃拉伸性能的影响

通过在 350°C 下以 1 × 10 -5  s的应变速率进行的慢应变速率拉伸试验,研究了预暴露和表面缺口对 T91 钢在氧饱和铅铋共晶 (LBE) 中拉伸性能的影响。 -1,并且参考测试在Ar气中进行。预曝光在 500°C 的液态 LBE 中进行,氧气浓度为 10 -8 500 小时的重量百分比。结果表明,无论有无缺口,未预暴露试样的拉伸性能均不受LBE的影响,但在预暴露试样上观察到明显的液态金属脆化(LME)。预曝光后,与无缺口试样相比,缺口试样更容易发生液体 LBE 脆化。在预暴露的缺口试样断面上观察到类似于疲劳条纹的形貌,这可能归因于裂纹的快速增长。结果表明,预曝光对 LME 具有关键影响,并且当存在预曝光时,表面缺口会加剧这种现象。
更新日期:2021-09-15
down
wechat
bug