Dependence of α-phase size on flow stress during dynamic recrystallization steady state in Ti60 alloy

作     者：hui li zhang-long zhao hong-zhen guo yong-quan ning ze-kun yao kai li 

作者机构：vSchool of Materials Science and Engineering NorthwesternPolytechnical University Xi'an 710072 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2017年第36卷第11期

页      面：851-857页

核心收录：

学科分类：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）] 

基　　金：financially supported by the National Natural Science Foundation of China (No.51205319) the Natural Science Foundation of Shannxi Province (No.2015JQ5152) the Fundamental Research Funds for the Central Universities (No.3102016ZY010) 

主　　题：Dynamic recrystallization Steady state Grainsize Ti60 alloy Hot deformation 

摘      要：The dependence of α-phase size on flow stress was characterized by a proposed kinetic model during dynamic recrystallization （DRX） steady state in Ti60 alloy. Accord- ing to the isothermal compression tests, the influence of deformation parameters on the steady-state flow stress was analyzed and the constitutive equation was established to predict the steady-state flow stress under different defor- mation temperatures and strain rates. A power-law rela- tionship between the DRX average grain size and steady- state flow stress with an exponent of -2 is obtained from the dynamic balance during DRX steady state. The effect of deformation parameters on at-phase size was observed through the microstructure after deformation, and the applicability of the model for Ti60 alloy was verified by the comparison between predicted and experimental data.