稀土元素对钛合金激光焊接头组织及性能的影响

doi:10.11896/cldb.23060020

材料导报

2025, Vol. 39

Issue (3): 23060020-5 https://doi.org/10.11896/cldb.23060020

金属与金属基复合材料

稀土元素对钛合金激光焊接头组织及性能的影响

程东海, 张夫庭, 陶玄宇, 余超, 龚浩, 李海涛^*, 王德, 熊震宇

南昌航空大学航空制造工程学院,南昌 330063

Effect of Rare Earth Elements on the Microstructure and Properties of Titanium Alloy Laser-welded Joints

CHENG Donghai, ZHANG Futing, TAO Xuanyu, YU Chao, GONG Hao, LI Haitao^*, WANG De, XIONG Zhenyu

School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China

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摘要在TC4钛合金激光焊缝中以Yb₂O₃的方式加入稀土元素Yb,探究稀土元素对TC4钛合金激光焊接接头组织、室温性能及高温性能的影响。研究表明:焊缝原始β晶粒内部存在弥散分布的白色Yb₂O₃,能有效减小焊缝中心宽度,并细化β晶粒尺寸。当Yb₂O₃含量为6%时,焊缝中心宽度减小22.3%,β晶粒尺寸减小32.4%。Yb₂O₃能够提高钛合金激光焊接接头塑性,随着Yb₂O₃含量增加,焊缝室温伸长率和高温延伸率均呈先增大后减小的趋势,Yb₂O₃含量在6%时,室温伸长率达到最大,为6.8%,高温延伸率达到最大,为382%。

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	程东海
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	李海涛
	王德
	熊震宇

关键词: 稀土元素激光焊接钛合金高温性能

Abstract: Rare earth element Yb was incorporated in the form of Yb₂O₃ into the laser weld of TC4 titanium alloy to explore the influences of rare earth elements on the microstructure, room-temperature properties, and high-temperature properties of the laser-welded joints of TC4 titanium alloy. The research indicates that there are white Yb₂O₃ particles dispersedly distributed within the original β grains of the weld, which can effectively narrow the width of the weld center and refine the β-grain size. When the content of Yb₂O₃ is 6%, the width of the weld center reduces by 22. 3%, and the β-grain size shrinks by 32. 4%. Yb₂O₃ can enhance the plasticity of the laser-welded joints of titanium alloy. With the increase in the Yb₂O₃ content, both the room-temperature elongation and the high-temperature elongation of the weld initially increase and then decrease. When the Yb₂O₃ content is 6%, the room-temperature elongation reaches a maximum of 6. 8%, and the high-temperature elongation attains a maximum of 382%.

Key words: rare earth element laser welding titanium alloy high-temperature property

出版日期: 2025-02-10 发布日期: 2025-02-05

ZTFLH:

TB31

基金资助: 江西省自然科学基金(20212BAB204044)

通讯作者: *李海涛,博士,讲师,硕士研究生导师,主要从事堆焊及金属表面防腐等方面的研究工作。70269@nchu.edu.cn

作者简介: 程东海,南昌航空大学航空制造工程学院副教授、硕士研究生导师。主要从事焊接/超塑成形技术、高能束焊接、钎焊等方向的研究工作。

引用本文:

程东海, 张夫庭, 陶玄宇, 余超, 龚浩, 李海涛, 王德, 熊震宇. 稀土元素对钛合金激光焊接头组织及性能的影响[J]. 材料导报, 2025, 39(3): 23060020-5.
CHENG Donghai, ZHANG Futing, TAO Xuanyu, YU Chao, GONG Hao, LI Haitao, WANG De, XIONG Zhenyu. Effect of Rare Earth Elements on the Microstructure and Properties of Titanium Alloy Laser-welded Joints. Materials Reports, 2025, 39(3): 23060020-5.

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http://www.mater-rep.com/CN/10.11896/cldb.23060020 或 http://www.mater-rep.com/CN/Y2025/V39/I3/23060020

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