Effects of heating rate on the alloy element partitioning and mechanical properties in equiaxedα+βTi-6Al-4V alloy

作     者：Jinhu Zhang Hongtao Ju Haisheng Xu Liang Yang Zhichao Meng Chen Liu Ping Sun Jianke Qiu Chunguang Bai Dongsheng Xu Rui Yang Jinhu Zhang;Hongtao Ju;Haisheng Xu;Liang Yang;Zhichao Meng;Chen Liu;Ping Sun;Jianke Qiu;Chunguang Bai;Dongsheng Xu;Rui Yang

作者机构：Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and EngineeringUniversity of Science and Technology of ChinaShenyang 110016China Shi-changxu Innovation Center for Advanced MaterialsInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China Safety Evaluation CenterShenyang Research Institute of Chemical Industry Co.Ltd.Shenyang 110141China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第94卷第35期

页      面：1-9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：support from the National Natural Science Foundation of China(No.51701219) the Doctoral Scientific Research Foundation of Liaoning Province(No.20180540133) the Special Project on Information Technology of the Chinese Academy of Sciences(No.XXH13506–304) 

主　　题：Heating rate Alloying element partitioning Microstructure morphology Mechanical properties 

摘      要：The effects of heating rate on the alloy element partitioning and mechanical properties during the phase transformation ofα→βin Ti-6Al-4 V alloy under solution treatment have been investigated by the experiments and phase field simulations,which reveal the evolutions of microstructure and compositions at the non-equilibrium state and well verify the experimental *** specific results indicate that the compositions measured through electron probe micro-analysis(EPMA)under a lower heating rate are close to the equilibrium ones corresponding to the solution *** up to the target solution temperature,as the heating rate increases,the Al content decreases and V increases in the primaryα(α_(p))grain with a larger size,the volume fraction ofα_(p)increases and the composition gradient betweenα_(p)andβphases gets *** interrelated relationship among the diffusion,compositions,solution temperature and free energy of the system has been discussed in ***,increasing the heating rate(~20.0 K/min)may help to improve the mechanical properties of the alloy by mainly adjusting theα_(p)/β;volume fractions,α_(p)particle size and secondaryα(α_(p))size during the process of heating up to the solution *** results may shed some light on the optimization of the knowledge-based heat treatment route.