The trade-off between strength and ductility remains a significant challenge in titanium alloy development.Micro structural engineering is a cost-effective alternative to balance strength and ductility.In this study,t...The trade-off between strength and ductility remains a significant challenge in titanium alloy development.Micro structural engineering is a cost-effective alternative to balance strength and ductility.In this study,three micro structures were produced in low-cost titanium alloys via solution treatment,and the alloys withα,α'-martensite,andβphases exhibited an optimal strengthductility combination.The hierarchical phase structure,α'-martensite reorientation,multi-oriented nanotwins,and dislocation interactions collectively contributed to its high yield strength(~1015 MPa),ultimate tensile strength(~1307 MPa),and satisfactory ductility(~13%).Importantly,this study reveals a new pathway for nanotwin formation inα'phases and provides key insights for optimizing the mechanical properties of low-cost titanium alloys.展开更多
基金financially supported by the National Key Research and Development Program of China(No.2022YFB3705601)the National Natural Science Foundation of China(No.52371092)the China Postdoctoral Science Foundation(No.2024M762659)
文摘The trade-off between strength and ductility remains a significant challenge in titanium alloy development.Micro structural engineering is a cost-effective alternative to balance strength and ductility.In this study,three micro structures were produced in low-cost titanium alloys via solution treatment,and the alloys withα,α'-martensite,andβphases exhibited an optimal strengthductility combination.The hierarchical phase structure,α'-martensite reorientation,multi-oriented nanotwins,and dislocation interactions collectively contributed to its high yield strength(~1015 MPa),ultimate tensile strength(~1307 MPa),and satisfactory ductility(~13%).Importantly,this study reveals a new pathway for nanotwin formation inα'phases and provides key insights for optimizing the mechanical properties of low-cost titanium alloys.
