Hot deformation characteristics and dynamic recrystallization of Ti−6Al−4V−0.5Mo−0.5Zr alloy used for petroleum drill pipe  

石油钻用Ti-6Al-4V-0.5Mo-0.5Zr钛合金的热变形特征及动态再结晶行为

作　　者：Zhen-ni ZHOU Gao-yong LIN Yu-hao AI Wei-zhong FENG Ping-hui ZHANG Hui-qun LIU 周珍妮;林高用;艾宇浩;凤伟中;张平辉;刘会群(中南大学材料科学与工程学院,长沙410083;宝鸡钛业股份有限公司,宝鸡721014)

机构地区：[1]School of Materials Science and Engineering,Central South University,Changsha 410083,China [2]Baoji Titanium Industry Co.,Ltd.,Baoji 721014,China

出　　处：《Transactions of Nonferrous Metals Society of China》2025年第2期486-498,共13页中国有色金属学报(英文版)

基　　金：National Key Research and Development Program of China (No. 2021YFB3700803);State Key Laboratory of Powder Metallurgy,Central South University,Changsha,China。

摘　　要：The high-temperature compression deformation behavior of Ti−6Al−4V−0.5Mo−0.5Zr alloy was investigated at temperatures from 890 to 1030℃ and strain rates from 0.01 to 10 s^(−1),and the corresponding dynamic recrystallization(DRX)mechanism was revealed.The results indicate that under different deformation conditions,the intensity of flow stress oscillations varied significantly.During thermal deformation in theα+βphase region,the stress−strain curves exhibited DRX.At temperatures below 950℃,continuous dynamic recrystallization(CDRX)of theαgrains and fracturing of the strip-like phase were apparent.At temperature higher than 950℃,theβphase and a part of secondaryαcolonies underwent DRX.研究在变形温度为890~1030℃和应变速率为0.01~10 s^(−1)条件下Ti-6Al-4V-0.5Mo-0.5Zr钛合金的高温变形行为,同时分析相应的动态再结晶(DRX)机理。研究结果表明,在不同的变形条件下会出现不同程度的应力振荡现象。在α+β两相区高温变形过程中,应力-应变曲线表现出明显的DRX特征。当变形温度低于950℃时,出现明显的α晶粒连续动态再结晶和条状相的断裂现象。当变形温度高于950℃时,β相和部分次生α相集束发生DRX。

关 键 词：titanium alloy stress-strain curves stress oscillation dynamic recrystallization 

分 类 号：TG146.23[一般工业技术—材料科学与工程]