罗文忠,孙峰,赵小花,张晓园,雷锦文.固溶处理对Ti60合金组织及拉伸性能的影响[J].稀有金属材料与工程,2017,46(12):3967~3971.[Wenzhong Luo,Feng Sun,Xiaohua Zhao,Xiaoyuan Zhang,Jinwen Lei.Influence of solution treatment on the microstructure and mechanical property of Ti60 alloy[J].Rare Metal Materials and Engineering,2017,46(12):3967~3971.]
固溶处理对Ti60合金组织及拉伸性能的影响
投稿时间:2015-10-30  修订日期:2016-09-02
中文关键词:  近α钛合金  固溶处理  马氏体  初生α相  拉伸性能
基金项目:国家国际科技合作专项(2013DFR50090)
中文摘要:
      本文通过对600°C用Ti60高温钛合金在不同温度固溶热处理,获得α′单相和α+α′两相组织,对比了两种组织特征及室温、300℃和600℃下的拉伸性能,探讨了初生α相对力学性能的影响规律。结果表明淬火过程中β相只析出α′马氏体相,α+α′组织保留约10%初生α相,初生α相的存在引起马氏体组织抗拉强度降低和塑性提升,进而获得更加匹配的强度和塑性。其中α+α′组织韧窝尺寸较大,因为少量初生α相则能够细化β晶粒尺寸,通过增加晶界面积阻碍裂纹扩展,进而提高塑性,随着温度升高,初生α相对合金塑性影响逐步减小。
Influence of solution treatment on the microstructure and mechanical property of Ti60 alloy
英文关键词:near α titanium alloy  solution treatment  martensite  primary α phase  tensile property
英文摘要:
      Both of the α′ and α+α′ martensite microstructures of Ti60 alloy as high temperature titanium alloy used up to 600°C can be obtained by solution treatments at different temperatures. The morphologies of the two microsturctures are compared as well as the tensile properties at room temperature, 300°C and 600°C. The results indicate that all the β phase transforms to α′ phase during quenching, and only about 10% primary α phase retains in the α+α′ microstructure. The little decrease of strength and great increase of ductility can be attributed to the partial solution of primary α phase. The size of dimple observed on the fracture of specimens with α+α′ microstructure at room temperature is larger than that with α′ microstructure. Because the retained primary α phase dedicates to the refinement of β grains, leading to the disturbance of expansion of cracks by increasing the length of grain boundaries. The influence of the primary α phase on the tensile properties decreases with the increasing of the tensile temperature.
作者单位E-mail
罗文忠 西部超导材料科技股份有限公司 dakr_sfg@126.com 
孙峰 西部超导材料科技股份有限公司 dakr_sfg@126.com 
赵小花 西部超导材料科技股份有限公司  
张晓园 西部超导材料科技股份有限公司  
雷锦文 西部超导材料科技股份有限公司  
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