CrCoNi基多主元合金研究进展

总结了近期引起国内外众多学者关注的CrCoNi基多主元合金的研究现状.首先简要地介绍了CrCoNi基合金的发展历史,详细分析了该合金的变形机理,其中包括变形孪晶的形成原因及其对合金性能产生的影响.其次介绍了包括冷轧、 热轧和增材制造在内的多种加工工艺对该合金显微组织及力学性能的影响.目前制备CrCoNi合金应用最广泛的...

Research Progress of CrCoNi-Based Multi-Component Alloys

This review comprehensively summarizes the recent researches of CrCoNi-based multi-component alloys which have attracted broad interest of researchers at home and abroad.The development history and research progress of CrCoNi-based alloys are briefly introduced.The deformation mechanism of the alloy is analyzed in detail,including the formation of the deformation twins and the effects on mechanical properties.Secondly,the effects of various processing techniques including cold rolling,hot rolling and additive manufacturing on the microstructures and mechanical properties of the CrCoNi-based alloy are presented.At present,the most widely used method of preparing CrCoNi alloy is“casting-cold rolling-heat treatment”.However,some researchers have discovered that the mechanical properties of the additive manufactured CrCoNi-based alloys without any post heat treatment are comparable to that of the alloys prepared by the traditional cold rolling and heat treatment,indicating that CrCoNi alloy is very suitable for additive manufacturing.Then the influences of various alloying elements on the microstructures,phase stability and mechanical properties of the CrCoNi-based multi-component alloy are also discussed.Among them,the addition of Al and Ti has the strongest strengthening effect on the CrCoNi alloy,which causes the precipitation ofγ′phase on the FCC matrix,improving the mechanical properties of the alloy.Finally,future research directions and potential applications of CrCoNi-based alloys are proposed.