摘要
The effect of nitrogen on microstructural evolution and tensile properties of transformation-induced plasticity(TRIP)Fe_(50)Mn_(30)Co_(10)Cr_(10)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.
基金
financially supported by the National Natural Science Foundation of China(Nos.U1960203,51774074,51434004 and U1435205)
the Fundamental Research Funds for the Central Universities(No.N180204015)
the Shanxi Municipal Major Science&Technology Project(No.20181101014)
the Fundamental Research Funds for the Central Universities(No.N172512033)。
