Effect of Cr and V on Microstructure of Multicomponent Ti-Al Alloy
Author of the article:WANG Yanjing;LI Hao;XU Zaidong;HU Qiuye;YANG Wenfeng;GONG Xiaoliang
Author's Workplace：School of Materials Science and Engineering,Shenyang Aerospace University,Shenyang 110122,China
Key Words：alloying grain refinement lamellar microstructure heat treatment
Abstract：
Effects of alloying elements and heat treatment on microstructure of Ti-44Al-4Nb-1Mo-0.1B alloy were studied by adding Cr and V, respectively. The results show that the microstructure of as-cast Ti-44Al-4Nb-1Mo-0.1B alloy is composed of(α2+γ) lamellar groups, molybdate and B2 phases. After Cr or V is added, Cr B phase and Ti0.925V0.075 phase are formed, and the laminar structure is refined. After heat treatment, Ti-44Al-4Nb-1Mo-0.1B alloy is a two-state structure,Ti-44Al-4Nb-1Mo-0.1B-1Cr alloy is a whole lamellar structure, and Ti-44Al-4Nb-1Mo-0.1B-1V alloy is a near-lamellar structure. The reduction of Cr to alpha phase transition temperature is stronger than that of V.
