机构地区: 西北有色金属研究院
出 处: 《郑州大学学报(工学版)》 2009年第1期6-9,共4页
摘 要: 研究了Ti-26合金在不同固溶温度和固溶时间条件下β晶粒的长大规律,并且计算了该合金在775~880℃范围内,保温1 h时,β晶粒的长大激活能Qm和在820℃保温0.5~4 h的生长指数n,分析了影响β晶粒的长大激活能Qm和生长指数n的主要原因.研究表明,Ti-26合金在β相区不同温度保温时,β晶粒的长大过程受Ti元素控制;合金在820℃(Tβ+45℃)固溶时,晶粒生长指数n仅为0.24是由于固溶原子落后于β晶界的移动而形成拖曳造成的,然而当固溶温度超过820℃时,β晶界的移动可以摆脱溶质原子的束缚. The growthing behavior of β-phase grain in Ti-26 alloy at different solution temperatures and holding times were investigated.The active diffusion energy Qm(at 775~880 ℃,for 1h) and the growthing exponent n(at 820 ℃,for 0.5 h to 4 h) were calculate and the main influence factors of Qm and n were analyzed.The results show that the growth of β-phase grain was controlled by Ti element at different temperatures above the β transus temperature of Ti-26 alloy.Moreover,the growthing exponent n is only 0.24 with ho...