Mechanical Anisotropy of Ti-6A1-4V Alloy with α martensite Microstructure
Ti-6A1-4V alloy are widely used for industrial applications because it combines excellent mechanical properties with low density. During hot-or cold working of Ti-6A1-4V alloy, the grains develop preferred orientations or texture accompanied by the deformation, recrystallization, grain growth or phase transformation. Such the texture formation results in pronounced anisotropy in mechanical properties. The microstructure consisting of a martensite phase is expected to reduce the mechanical anisotropy in products of sheet and bar,due to the formation of relatively random crystallography orientations in α as compared to equilibrium (α+β). In this work, the mechanical anisotropy of Ti-6A1-4V alloy with α martensite microstructure is examined with comparing the mechanical properties of alloy with equilibrium (α+β) microstructure. The Ti-6A1-4V alloy heat treated at 1223 K and quenched into ice-water exhibits the (α+α) duplex microstructure and relatively random crystallography orientations as compared to that in alloy with equilibrium (α+β) microstructure. The mechanical anisotropies of Youngs modulus,strength and elongation to fracture in Ti-6A1-4V alloy-plate are reduced by the formation of the (α+α) duplex microstructure. This result indicates that formation of α martensite microstructure is effective for reducing the mechanical anisotropy in Ti-6A1-4V alloy-plate.
Titanium alloy martensite microstructure mechanical anisotropy crystallographic orientation
Hiroaki MATSUMOTO Hiroshi YONEDA Bin LIU Yunpig LI Akihiko CHIBA
Institute for Materials Research , Tohoku University Graduate Student,Tohoku University
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
968-971
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）