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| 表面纳米化对高温Ti合金与TiAl合金的扩散连接工艺及力学性能影响 |
| Effect of Surface Nanocrystallization on Diffusion Bonding Process and Mechanical Property of Titanium Alloy and Titanium Aluminium Alloy at High Temperature |
| Received:January 22, 2020 Revised:March 10, 2020 |
| DOI：10.3969/j.issn.1674-6457.2020.02.008 |
| 中文关键词: 表面纳米化 扩散连接 钛合金 钛铝合金 |
| 英文关键词: surface nanocrystallization diffusion bonding TC11 titanium alloy titanium aluminum alloy |
| 基金项目:国家自然科学基金（51975084a，51405059）；航空科学基金（20185425009）；中央高校基本科研业务费专项资金（DUT19LAB16）；大学生创新创业项目 |
| Author Name | Affiliation | | WANG Hao-miao | 1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, China | | SHI Shu-yan | 1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, China | | FU Xue-song | 1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, China | | WANG Xiao-chen | 1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, China | | ZHOU Wen-long | 1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, China | | XU Hui-yuan | 2. AVIC Manufacturing Technology Institute, Beijing 100024, China | | LI Zhi-qiang | 2. AVIC Manufacturing Technology Institute, Beijing 100024, China |
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| 中文摘要: |
| 目的 研究表面纳米化Ti合金与TiAl合金异质扩散连接的界面反应、力学性能和工艺条件。方法 利用高能喷丸技术对钛合金的表面进行纳米化处理，然后在高温压力真空炉内进行扩散连接实验。结果 Ti合金/TiAl扩散连接的结合强度与中间层厚度密切相关，当中间层厚度为1.7~2.0 μm时，剪切强度最大。结论 表面纳米化可以促进原子扩散、增加接头厚度、缩短扩散连接所需的时间。对于扩散界面存在缝隙接头，在无压热处理条下表面纳米化样品可以快速提高焊合率，改善连接质量。 |
| 英文摘要: |
| The work aims to study the interfacial reaction, mechanical properties and process conditions of diffusion bonding between surface nanocrystallized Ti alloy and TiAl alloy. The surface layer of titanium alloy was nanocrystallized by high energy shot peening technology, and then diffusion bonding experiments were carried out in high temperature pressure vacuum furnace. The strength of Ti alloy/TiAl diffusion bonding was closely related to the thickness of the intermediate layer. When the thickness of the intermediate layer was in the range of 1.7-2.0 μm, the shear strength was the largest. Surface nanocrystallization can promote atom diffusion, increase joint thickness and shorten diffusion bonding time. For joints with gap in diffusion interface, surface nano-sample under non-pressure heat treatment strip can rapidly improve bonding rate and bonding quality. |
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