Substructure of recovered Ti-23Nb-0.7Ta-2Zr-O alloy
Ti-23Nb-0.7Ta-2Zr-O (TNTZO,molar fraction,％) alloy is a newly developed multifunctional β-type titanium alloy.This alloy was reported to deform via a unique dislocation-free deformation mechanism,and thus its recovery and recrystallization behavior should be further studied and compared with traditional BCC metals.The substructures of the cold-swaged and the annealed TNTZO alloy were investigated by transmission electron microscopy(TEM) to study the recovery of the cold-swaged TNTZO alloy.The results show that no dislocation can be distinguished from the cold-swaged TNTZO alloy due to the heavily-accumulated strains,whereas high density dislocations were observed in the cold-swaged TNTZO alloy after annealing at 800 for 5 min ℃ .During annealing,recovery proceeds through the redistribution and annihilation of the dislocations,which are considered to result from the plastic deformation and the recovery process of the cold-swaged TNTZO alloy is similar to that of ordinary BCC metals.
βtitanium alloy substructure recovery dislocation
XING Hui GUO Wen-yuan SUN Jian
School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）