Role of γ′ characteristic on the hydrogen embrittlement susceptibility of Fe–Ni–Cr alloys

Role of γ′ characteristic on the hydrogen embrittlement susceptibility of Fe–Ni–Cr alloys
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γ-特性对Fe-Ni-Cr合金氢脆敏感性的影响

DOI:
10.1016/j.corsci.2015.09.003
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发表时间:
2015-12
期刊:
影响因子:
8.3
通讯作者:
戎利建
戎利建
中科院分区:
材料科学1区
文献类型:
--
作者:
陈胜虎;赵明久;戎利建

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研究了Fe-Ni-Cr合金中γ′特征对氢脆敏感性的影响。拉伸实验结果表明,随着γ′含量的增加或APB能量的增加,HE敏感性增加。断口分析表明,随着γ′含量的增加,沿晶断裂频率增加,断裂方式由沿晶断裂向穿晶断裂转变。氢致开裂机理是APB能对平面滑移程度的影响大于γ′量。
The effect of γ′ characteristic on the hydrogen embrittlement (HE) susceptibility was investigated in Fe–Ni–Cr alloys with respect to γ′ amount and antiphase boundary (APB) energy. Tensile results revealed that HE susceptibility would increase with an increase in the γ′ amount or APB energy. Fractographic analysis showed that an increase in γ′ amount enhances the frequency of intergranular cracking while the fracture mode changed from intergranular fracture to transgranular fracture with increasing APB energy. The hydrogen–induced cracking mechanism is attributed to that APB energy has a greater effect on the degree of planar slip than the γ′ amount.
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