Role of retained austenite in low alloy steel at low temperature monitored by neutron diffraction
Role of retained austenite in low alloy steel at low temperature monitored by neutron diffraction
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DOI：
10.1016/j.scriptamat.2019.10.002
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发表时间：
2020-03
影响因子：
6
通讯作者：
Takayuki Yamashita;S. Morooka;S. Harjo;T. Kawasaki;N. Koga;O. Umezawa
中科院分区：
文献类型：
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作者：
Takayuki Yamashita;S. Morooka;S. Harjo;T. Kawasaki;N. Koga;O. Umezawa
对一种含残余奥氏体（γ）的低合金钢进行了低温拉伸过程中的原位中子衍射测量。分析和讨论了变形过程中相含量和相应力的变化规律。在低温变形过程中，γ在钢中的作用被观察到不是直接贡献于强度，而是通过γ向马氏体的转变来改善延伸率，以及通过马氏体相分数的增加和马氏体的加工硬化来增加加工硬化速率。
In-situneutron diffraction measurements during tensile tests at low temperatures of a low alloy steel containing retained austenite (γ) have been performed. Evolutions of phase fractions and phase stresses were analyzed and discussed with the progress of deformation. The role of γ in the steel during deformation at low temperatures was observed not to directly in the contribution to the strengths but in the improvement of the elongation by transformation of γ to martensite -and in the increasing of the work-hardening rate by an increase in the phase fraction of martensite and the work hardening of martensite.