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Phase Transition Mechanism and Mechanical Properties of AlCrFe2Ni2 High‐Entropy Alloys with Changes in the Applied Carbon Content
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-02-12 , DOI: 10.1002/adem.201901363 Zhe Li 1 , Junhua You 1 , Yaozu Guo 1 , Chengze Li 1 , Yufeng Zhang 1 , Ziyu Liu 1
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-02-12 , DOI: 10.1002/adem.201901363 Zhe Li 1 , Junhua You 1 , Yaozu Guo 1 , Chengze Li 1 , Yufeng Zhang 1 , Ziyu Liu 1
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To understand the effect of carbon addition on dual‐phase high‐entropy alloys (HEAs), the mechanism of phase transition and mechanical properties of AlCrFe2Ni2Cx (x = 0, 0.06, 0.12, 0.18, 0.24) are investigated systematically. The results show that carbon addition induced the growth and aggregate of disordered noodle‐like face‐centered cubic (FCC) phases. The volume fraction of the FCC phase increases from 33.2% to 51.2% as the C content increases. The Al and Ni in the alloys are segregated at the phase boundaries. Disappearance of the spinodal decomposition structure compose of a disordered body‐centered cubic (BCC) structure and an ordered BCC structure (B2). The BCC phase transform into a spherical B2 phase with increasing C content. The experimental mechanical properties show that the yield strength of the HEAs is closely related to the volume fraction of BCC phase as the C content increases. The ε phase (Cr, C carbonization) precipitate in an FCC phase when the C content is above 2.0 at%. The hardness of the HEAs increases from 310 to 357 HV as the C content increases. The compressive strength and the fracture strain of the alloy decreases as the C content increases.
中文翻译：
AlCrFe2Ni2高熵合金随碳含量变化的相变机理和力学性能
为了了解碳添加对双相高熵合金（HEA）的影响，AlCrFe 2 Ni 2 C x（x的相变机理和力学性能 = 0、0.06、0.12、0.18、0.24）。结果表明，碳的添加诱导了无序面条状面心立方（FCC）相的生长和聚集。随着C含量的增加，FCC相的体积分数从33.2％增加到51.2％。合金中的Al和Ni在相界处偏析。旋节线分解结构的消失由无序的体心立方（BCC）结构和有序的BCC结构（B2）组成。随着C含量的增加，BCC相转变为球形B2相。实验力学性能表明，随着C含量的增加，HEA的屈服强度与BCC相的体积分数密切相关。当C含量高于2.0at％时，ε相（Cr，C碳化）在FCC相中析出。随着C含量的增加，HEA的硬度从310 HV增加到357 HV。随着C含量的增加，合金的抗压强度和断裂应变降低。
更新日期：2020-02-12
中文翻译：
AlCrFe2Ni2高熵合金随碳含量变化的相变机理和力学性能
为了了解碳添加对双相高熵合金（HEA）的影响，AlCrFe 2 Ni 2 C x（x的相变机理和力学性能 = 0、0.06、0.12、0.18、0.24）。结果表明，碳的添加诱导了无序面条状面心立方（FCC）相的生长和聚集。随着C含量的增加，FCC相的体积分数从33.2％增加到51.2％。合金中的Al和Ni在相界处偏析。旋节线分解结构的消失由无序的体心立方（BCC）结构和有序的BCC结构（B2）组成。随着C含量的增加，BCC相转变为球形B2相。实验力学性能表明，随着C含量的增加，HEA的屈服强度与BCC相的体积分数密切相关。当C含量高于2.0at％时，ε相（Cr，C碳化）在FCC相中析出。随着C含量的增加，HEA的硬度从310 HV增加到357 HV。随着C含量的增加，合金的抗压强度和断裂应变降低。
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