亚稳态β钛合金Ti55511模锻过程中显微组织演变与变形行为
Microstructure Evolution and Deformation Behavior of Metastable β-Titanium Alloy Ti55511 in Die Forging
谷宾 1熊智豪 1杨平 1顾新福 1颜孟奇 2沙爱学2
作者信息
- 1. 北京科技大学材料科学与工程学院,北京 100083
- 2. 中国航发北京航空材料研究院,北京 100095
- 折叠
摘要
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.
Abstract
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.
关键词
亚稳态β钛合金/显微组织/织构/模锻/EBSDKey words
metastable β-titanium alloy/microstructure/texture/die forging/EBSD引用本文复制引用
基金项目
National Science and Technology Project of China(JPPT-135-GH-2-017)
Fellowship of China Postdoctoral Science Foundation(2022M720399)
出版年
2024
NETL
NSTL
万方数据