Simultaneous enhancement in strength and ductility of Fe50Mn30Co10Cr10 high-entropy alloy via nitrogen alloying
来源期刊:JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第6期
论文作者:Yu Han Huabing Li Hao Feng Kemei Li Yanzhong Tian Zhouhua Jiang
摘 要:The effect of nitrogen on microstructural evolution and tensile properties of transformation-induced plasticity(TRIP) Fe50 Mn30 Co10 Cr10 HEAs 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.
Yu Han1,Huabing Li1,2,Hao Feng1,Kemei Li1,Yanzhong Tian3,Zhouhua Jiang1,2
1. School of Metallurgy, Northeastern University2. State Key Laboratory of Rolling and Automation, Northeastern University3. School of Materials Science and Engineering, Northeastern University
摘 要:The effect of nitrogen on microstructural evolution and tensile properties of transformation-induced plasticity(TRIP) Fe50 Mn30 Co10 Cr10 HEAs 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.
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