Simultaneous enhancement in strength and ductility of Fe50Mn30Co10Cr10 high-entropy alloy via nitrogen alloying
Simultaneous enhancement in strength and ductility of Fe50Mn30Co10Cr10 high-entropy alloy via nitrogen alloying
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DOI：
10.1016/j.jmst.2020.04.072
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发表时间：
2021-02
影响因子：
10.9
通讯作者：
Han Yu;Hua-bing Li;H. Feng;Kemei Li;Y. Tian;Zhou-hua Jiang
中科院分区：
文献类型：
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作者：
Han Yu;Hua-bing Li;H. Feng;Kemei Li;Y. Tian;Zhou-hua Jiang
研究了氮对相变诱发塑性（TRIP）Fe50Mn30Co10Cr10HEAs组织演变和拉伸性能的影响。采用压力诱导熔化技术将氮气充分引入固溶体中。氮的加入使TRIP合金转变为孪晶诱导塑性（TTRIP）合金，同时提高了强度和伸长率。对于掺氮HEA，高屈服强度主要是由于摩擦应力通过间隙强化效应，和高塑性起源于通过位错积累和变形孪晶的连续开始保留高的应变硬化能力。揭示了特定应变下的应变硬化行为和组织演变规律。
The effect of nitrogen on microstructural evolution and tensile properties of transformation-induced plasticity (TRIP) Fe50Mn30Co10Cr10HEAs was investigated. Nitrogen was fully introduced in solid solution by pressure-induced melting technique. Nitrogen addition turned the TRIP alloy to a twinning-induced plasticity (TWIP) alloy, and simultaneously improved the strength and elongation. For the nitrogen-doped HEA, the high yield strength is mainly resulted from the friction stress via interstitial strengthening effect, and the high ductility is originated from retained high strain-hardening capability via the successive onset of dislocation accumulation and deformation twinning. The strain-hardening behavior and microstructural evolution at specified strains were revealed.