宇航材料工艺2024，Vol.54Issue(3)：45-54,10.DOI:10.12044/j.issn.1007-2330.2024.03.006
热处理及晶粒组织对2A55超高强铝锂合金板材各向异性的影响
Effect of Heat Treatments and Grain Structures on the Anisotropy of Super High-strength 2A55 Al-Li Alloy Sheets
邹智涛 1李劲风 1马鹏程 2陈永来 2张绪虎2
作者信息
- 1. 中南大学材料科学与工程学院,长沙 410083
- 2. 航天材料及工艺研究所,北京 100076
- 折叠
摘要
Abstract
In this paper,the in-plane anisotropy of super high-strength 2A55 Al-Li alloy sheets with thicknesses of 10 mm and 2 mm were compared and analyzed by means of tensile test at room temperature,X-ray and EBSD texture detection,etc.The effects of different heat treatments and grain structures were studied.The results show that the hard orientations were parallel to the rolling direction(0°)and the transverse direction(90°)after heat treatments.The anisotropic behavior of the sheets can be mainly attributed to the crystallographic texture,because the calculated Taylor factors were consistent with the yield strength anisotropy of the solutionized sheets and the sheets in condition T6.The severer anisotropy of 10 mm-thickness sheets was attributed to higher volume fraction of textures and aspect ratio of grains.Moreover,the aging treatments weakened the anisotropy of 10 mm-thickness sheets,but it had an opposite effect on 2 mm-thickness sheets.Sheets in condition T3 and T8 displayed severer in-plane anisotropy than those in condition T4 and T6.The pre-deformation before aging treatments increased the anisotropic behavior of the sheets.关键词
铝锂合金/热处理/织构/泰勒因子/各向异性Key words
Al-Li alloy/Heat treatments/Texture/Taylor factor/Anisotropy分类
矿业与冶金引用本文复制引用
邹智涛,李劲风,马鹏程,陈永来,张绪虎..热处理及晶粒组织对2A55超高强铝锂合金板材各向异性的影响[J].宇航材料工艺,2024,54(3):45-54,10.
