Effect of Mo, V and Zr on the microstructure and mechanical properties of Ti2AlNb alloys

MATEC Web of Conferences

He Yongsheng¹  Li Jinshan²  Luo Wenzhong³  Wang Kaixuan³  Liu Xianghong³  Zhao Xiaohua³ 

[1] ;State Key Laboratory of Solidification Processing, Northwestern Polytechnical University;Western Superconducting Technologies Co., Ltd;

关键词: ti2alnb alloys;    heat treatment;    microstructure;    hardness;   

DOI  :  10.1051/matecconf/202032108003

来源: DOAJ

【 摘 要 】

Small button ingots of Ti2AlNb alloys with different contents of Mo, V and Zr were melted by vacuum non-consumable arc furnace. Due to the rapid cooling rate during melting process, only β grains without precipitation were observed in most of the button ingots and no regular phenomenon was found. However, when the samples were heated to β phase region and then furnace cooled to room temperate, different morphologies and quantities of primary α phase and second O phase formed from the β grains of different samples. It is suggested that the morphology of α phase was changed from lamellar to quadrilateral with increasing V and the lath O increased with increasing Zr. Besides, the residual β/B2 phase increased with increasing Mo and V. The EDS results showed that Al and Zr were enriched in α phase whereas Nb, Mo and V were enriched in β/B2 phase. The micro-hardness of these samples before and after heat treatment was detected and the micro-hardness increased with increasing Zr and decreasing Mo and V.

【 授权许可】

Unknown