固溶时效处理对高强高韧钛合金显微组织与力学性能的影响

夏晓洁; 吴国清; 黄正; 李志燕

doi:10.13700/j.bh.1001-5965.2014.0517

固溶时效处理对高强高韧钛合金显微组织与力学性能的影响

doi: 10.13700/j.bh.1001-5965.2014.0517

夏晓洁^1,2,
吴国清^2, ,,
黄正²,
李志燕³

1.
上海飞机设计研究院, 上海 201210
2. 北京航空航天大学材料科学与工程学院, 北京 100191
3. 北京航空材料研究院, 北京 100095

基金项目: 航空科学基金(2012ZEL056); 教育部长江学者和创新团队发展计划(IRT0805)

详细信息

作者简介:
夏晓洁(1989—),女,湖北荆州人,硕士研究生,xxj_beijing@126.com

通讯作者:
吴国清(1974—),男,山东临沂人,副教授,guoqingwu@buaa.edu.cn,主要研究方向为轻质合金及复合材料设计与成型技术.

中图分类号: TG146.23
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- 被引次数: 0
出版历程
- 收稿日期: 2014-08-21
- 修回日期: 2014-09-19
- 网络出版日期: 2015-07-20

Effects of solution-aging treatment on microstructure and mechanical properties of a high-strength and high-toughness titanium alloy

1.
Shanghai Aircraft Design and Research Institute, Shanghai 201210, China
2. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
3. Beijing Institute of Aeronautical Materials, Beijing 100095, China

摘要

摘要: 对固溶时效处理后的高强高韧钛合金初生α相的体积分数、尺寸,次生α相的体积分数和α_s/β相界面密度等显微组织特征进行了定量表征和统计分析,探讨了随着固溶温度的变化,高强高韧钛合金显微组织与其力学性能间的相关性.结果表明:在α+β两相区固溶时效处理,随着固溶温度的升高,合金初生α相的体积分数降低,相尺寸先降低后略有升高,次生α相的体积分数升高,α_s/β相界面密度先升高后降低.初生α相的体积分数与伸长率、静力韧度和裂纹形成功正相关,α_s/β相界面密度与合金屈服强度成正相关.
- 近β钛合金 /
- 固溶时效 /
- 显微组织 /
- 力学性能 /
- 量化分析
Abstract: Solution-aging treatment was performed to a high-strength and high-toughness titanium alloy. Several microstructural feature including volume fraction of primary α phase, size factor of primary α phase, volume fraction of secondary α phase, α_s/β interface density, were quantitatively characterized. By making a statistical analysis of the microstructure characteristics, the relationship between microstructure features and mechanical properties of the high-strength and high-toughness titanium alloy was investigated as solution temperature changed. The results show that with the increase of solution temperature in α+β phase, the volume fraction of primary α phase decreases, the size factor of primary α phase firstly decreases and then increases, volume fraction of secondary α phase increases, and the α_s/β interface density increases and then decreases. The elongation, static toughness and crack initiation energy increase with the growth of the volume fraction of primary α phase. And yield strength is positively correlated with the α_s/β interface density.
- near β titanium alloy /
- solution-aging treatment /
- microstructure /
- mechanical properties /
- quantified analysis

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