Effectiveness of hot deformation and subsequent annealing forβgrain refinement of Ti-5Al-5Mo-5V-1Cr-1Fe titanium alloy

作     者：Yi-Min Cui Wei-Wei Zheng Chao-Hua Li Guan-Hua Cao Yan-Dong Wang Yi-Min Cui;Wei-Wei Zheng;Chao-Hua Li;Guan-Hua Cao;Yan-Dong Wang

作者机构：State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2021年第40卷第12期

页      面：3608-3615页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the National Key Research and Development Program of China(No.2016YFB0701302) 

主　　题：Grain refinement Dynamic recrystallization Hot deformation High strength titanium alloy 

摘      要：High strength titanium alloys suffer from a limited combination of strength and *** their micro structure,the coarseβgrain is a detrimental *** the present study,the effects of hot deformation and annealing treatment on theβgrain refinement of Ti-5 Al-5 Mo-5 V-1 Cr-1 Fe(TC18)titanium alloy have been investigated by using electronic backscattered diffraction(EBSD)and transmission electric microscopy(TEM).Hot compression tests of TC18 alloy were performed between 1073 and 1223 K at strain rates of 0.01 and 0.10 s^(-1)·Subsequent annealing treatments were conducted to investigate the effect of deformation microstructure on the recrystallization behavior ofβ*** results indicate that dynamic recovery(DRV)is the dominant restoration mechanism during hot *** dynamic recrystallization(dDRX)is significantly limited at a higher temperature in theβregion,whereas continuous dynamic recrystallization(cDRX)of theβphase is observed at a higher strain rate in the(α+β)*** final annealing microstructure is highly dependent on the deformation *** dDRX during hot deformation could not effectively refine theβ*** refined and uniformβgrains with an average grain size of 12μm are achieved by combining hot deformation and subsequent annealing in the(α+β)*** study provides a guide for theβgrain refinement of high strength titanium alloys.