北京航空航天大学学报 ›› 2015, Vol. 41 ›› Issue (7): 1294-1299.doi: 10.13700/j.bh.1001-5965.2014.0517

• 论文 • 上一篇    下一篇

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1,2, 吴国清2, 黄正2, 李志燕3   

  1. 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
  • 收稿日期:2014-08-21 修回日期:2014-09-19 出版日期:2015-07-20 发布日期:2015-07-30
  • 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. E-mail:guoqingwu@buaa.edu.cn
  • 作者简介:夏晓洁(1989—),女,湖北荆州人,硕士研究生,xxj_beijing@126.com
  • 基金资助:
    航空科学基金(2012ZEL056); 教育部长江学者和创新团队发展计划(IRT0805)

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

XIA Xiaojie1,2, WU Guoqing2, HUANG Zheng2, LI Zhiyan3   

  1. 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
  • Received:2014-08-21 Revised:2014-09-19 Online:2015-07-20 Published:2015-07-30

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αs/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,αs/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,αs/β相界面密度与合金屈服强度成正相关.

关键词: 近&beta, 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, αs/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 αs/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 αs/β interface density.

Key words: near &beta, titanium alloy, solution-aging treatment, microstructure, mechanical properties, quantified analysis

中图分类号: 


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