Ti62A钛合金固溶过程中初生α相的球化机理

doi:10.13251/j.issn.0254-6051.2024.03.029

金属热处理 ›› 2024, Vol. 49 ›› Issue (3): 168-173.DOI: 10.13251/j.issn.0254-6051.2024.03.029

Ti62A钛合金固溶过程中初生α相的球化机理

李海涛¹, 陈冬梅¹, 官海婷², 袁武华²

1.中国航空工业集团公司沈阳飞机设计研究所, 辽宁沈阳 110035;
2.湖南大学材料科学与工程学院, 湖南长沙 410082

收稿日期:2023-09-29 修回日期:2023-12-26 出版日期:2024-03-25 发布日期:2024-04-24
通讯作者: 袁武华,教授,E-mail:yuan46302@163.com
作者简介:李海涛(1978—),男,高级工程师,硕士,主要研究方向为航空金属材料技术,E-mail:leastaony@163.com。

Spheroidization mechanism of primary α-phase in solution treatment process of Ti62A titanium alloy

Li Haitao¹, Chen Dongmei¹, Guan Haiting², Yuan Wuhua²

1. Shenyang Institute of Aircraft Design, Aviation Industry Corporation of China, Shenyang Liaoning 110035, China;
2. College of Materials Science and Engineering, Hunan University, Changsha Hunan 410082, China

Received:2023-09-29 Revised:2023-12-26 Online:2024-03-25 Published:2024-04-24

摘要/Abstract

摘要： 采用OM、SEM和EBSD检测技术,对Ti62A钛合金在910 ℃固溶不同时间时的初生α相显微组织进行表征,探究固溶处理过程中初生α相的演变特征及球化机制。结果表明,锻态Ti62A钛合金初始组织由初生α相、片层α相和残留β相组成,在910 ℃固溶过程中,片层状α相快速溶解,且随着固溶时间延长,初生α相的体积分数先减小后保持不变,但轴径比基本保持在2.1左右。固溶处理过程中,初生α相晶粒内部出现较大的取向差,产生取向不同的α/α晶界。随着固溶时间的增长,长条状初生α相内α/α晶界的取向差大于10°时,晶粒易发生晶界分离,形成新的等轴初生α相。

关键词: Ti62A钛合金, 固溶处理, 显微组织, α相, 球化机制

Abstract: Primary α phase microstructure of Ti62A titanium alloy solution treated at 910 ℃ for different time was characterized by means of OM, SEM and EBSD techniques, to investigate the evolution characteristics of the primary α phase and the spheroidization mechanism during the solid solution process. The results show that the initial microstructure of the forged Ti62A titanium alloy consists of the primary α phase, lamellar α phase and residual β phase. During the solid solution process at 910 ℃, the lamellar α phase dissolves rapidly, and the volume fraction of primary α phase first decreases and then remains unchanged with the increase of solution time, but the axis/diameter ratio is basically maintained at about 2.1. During the solution treatment, a large misorientation appeares inside the grains of the primary α phase, producing α/α grain boundaries with different orientations. With the growth of solution time, the grain is prone to grain boundary separation and the formation of new equiaxed primary α phase when the misorientation of α/α grain boundaries within the long strip primary α phase is greater than 10°.

Key words: Ti62A titanium alloy, solution treatment, microstructure, α phase, spheroidization mechanism

中图分类号:

李海涛, 陈冬梅, 官海婷, 袁武华. Ti62A钛合金固溶过程中初生α相的球化机理[J]. 金属热处理, 2024, 49(3): 168-173.

Li Haitao, Chen Dongmei, Guan Haiting, Yuan Wuhua. Spheroidization mechanism of primary α-phase in solution treatment process of Ti62A titanium alloy[J]. Heat Treatment of Metals, 2024, 49(3): 168-173.

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Ti62A钛合金固溶过程中初生α相的球化机理

Spheroidization mechanism of primary α-phase in solution treatment process of Ti62A titanium alloy

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