TB18钛合金晶粒长大动力学  

Grain Growth Kinetics of TB18 Titanium Alloy

作　　者：周伟[1] 刘向宏[2] 冯军 辛社伟[1] 张思远[1] 张新全 王涛[2] 秦凤英 李波 Zhou Wei;Liu Xianghong;Feng Jun;Xin Shewei;Zhang Siyuan;Zhang Xinquan;Wang Tao;Qin Fengying;Li Bo(Northwest Institute for Nonferrous Metal Research,Xi'an 710016,China;Western Superconducting Technologies Co.,Ltd,Xi'an 710021,China;AVIC The First Aircraft Institute,Xi'an 710089,China)

机构地区：[1]西北有色金属研究院,陕西西安710016 [2]西部超导材料科技股份有限公司,陕西西安710021 [3]中国航空工业第一飞机设计研究院,陕西西安710089

出　　处：《稀有金属材料与工程》2022年第9期3129-3132,共4页Rare Metal Materials and Engineering

摘　　要：通过TB18钛合金在不同温度和保温时间的条件下β晶粒尺寸的变化,研究了新型超高强TB18钛合金β晶粒的长大行为。结果表明,加热温度及保温时间对TB18钛合金β晶粒长大行为具有重要影响:β晶粒尺寸随加热温度及保温时间的增加而增加,且920℃为合金的粗化温度。通过Beck公式计算了晶粒长大参数,采用Arrhenius公式计算了晶粒长大激活能。TB18钛合金β晶粒长大指数n为0.13~0.26,β晶粒长大激活能为34.27~60.58 k J/mol。The β grain growth behavior of a novel high strength TB18 titanium alloy was investigated through the variation of β grain size in TB18 titanium alloy under the conditions of different temperatures and holding times.Results show that the heat treatment temperature and holding time have significant effects on the β grain growth of TB18 titanium alloys.The β grain size is increased with increasing the solution temperature and holding time.Besides,the coarsening temperature of TB18 alloys is 920 ℃.The grain growth exponents and grain growth activation energy were calculated by Beck equation and Arrhenius equation,respectively.The grain growth exponent n is 0.13~0.26 for the TB18 alloys.The grain growth activation energy of the TB18 alloy is 34.27~60.58 k J/mol.

关 键 词：钛合金 β热处理 晶粒尺寸 晶粒长大激活能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]