Microstructure Evolution and Deformation Behavior of Metastable β-Titanium Alloy Ti55511 in Die Forging  

亚稳态β钛合金Ti55511模锻过程中显微组织演变与变形行为

作　　者：Gu Bin Xiong Zhihao Yang Ping Gu Xinfu Yan Mengqi Sha Aixue 谷宾;熊智豪;杨平;顾新福;颜孟奇;沙爱学(北京科技大学材料科学与工程学院,北京100083;中国航发北京航空材料研究院,北京100095)

机构地区：[1]School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China

出　　处：《稀有金属材料与工程》2024年第9期2420-2429,共10页Rare Metal Materials and Engineering

基　　金：National Science and Technology Project of China(JPPT-135-GH-2-017);Fellowship of China Postdoctoral Science Foundation(2022M720399)。

摘　　要：The effect of die forging on the microstructure evolution and deformation behavior of metastable β-titanium alloy Ti55511 was investigated by electron backscatter diffraction.Before die forging,the alloy Ti55511 was subjected to multi-pass forging to optimize the microstructural heterogeneity(texture)which can cause mechanical behavior anisotropy of titanium alloys.Results show that after die forging,Ti55511 components exhibit different microstructures and textures in different local areas.No<100>fiber texture is found in all areas with different degrees of deformation.Dynamic recrystallization occurs in the area where large strain occurs during the early stage of die forging.Basket-weave microstructure forms in most local areas.采用电子背散射衍射法研究了模锻对亚稳态β钛合金Ti55511显微组织演变和变形行为的影响。在模锻之前,对Ti55511合金进行了多道次锻造,以优化钛合金织构导致的力学行为各向异性。结果表明,模锻后,Ti55511部件局部区域表现出不同的显微组织和织构。在所有变形区域都没有发现<100>纤维织构。动态回复再结晶发生在模锻早期承受大应变的区域,大多数局部区域形成了网篮组织。

关 键 词：metastableβ-titanium alloy microstructure TEXTURE die forging EBSD 

分 类 号：TG316.3[金属学及工艺—金属压力加工] TG146.23[一般工业技术—材料科学与工程]