|
| 超声冲击对铝合金搅拌摩擦焊接头组织及性能的影响 |
| Effects of Ultrasonic Impact on Microstructure and Properties of Friction Stir Welded Aluminum Alloy |
| Received:July 21, 2019 Revised:September 10, 2019 |
| DOI：10.3969/j.issn.1674-6457.2019.05.011 |
| 中文关键词: 超声冲击 搅拌摩擦焊 2A12铝合金 显微组织 腐蚀性能 |
| 英文关键词: ultrasonic impact friction stir welding 2A12 aluminum alloy microstructure corrosion properties |
| 基金项目:江西省教育厅科学技术研究项目（GJJ180507） |
| Author Name | Affiliation | | DENG Yun-fa | Jiangxi Key Laboratory of Forming and Joining Technology for Aviation Components, Nanchang Hangkong University,Nanchang 330063, China | | ZHANG Ti-ming | Jiangxi Key Laboratory of Forming and Joining Technology for Aviation Components, Nanchang Hangkong University,Nanchang 330063, China | | GAN Xian-wei | Jiangxi Key Laboratory of Forming and Joining Technology for Aviation Components, Nanchang Hangkong University,Nanchang 330063, China | | YOU Yi-ming | Jiangxi Key Laboratory of Forming and Joining Technology for Aviation Components, Nanchang Hangkong University,Nanchang 330063, China | | CHEN Yu-hua | Jiangxi Key Laboratory of Forming and Joining Technology for Aviation Components, Nanchang Hangkong University,Nanchang 330063, China |
|
| Hits: 3380 |
| Download times: 2249 |
| 中文摘要: |
| 目的 分析超声冲击对铝合金搅拌摩擦焊成形后接头的组织及耐蚀性的作用效果。方法 采用超声冲击设备对2A12铝合金搅拌摩擦焊接头表面进行超声冲击处理，并对超声冲击前后接头的显微组织、显微硬度以及耐腐蚀性能进行了分析。结果 经过超声冲击处理后的铝合金接头上表面会产生一层塑性变形层，并且塑性层内位错密度增大，使表层金属得到一定程度的加工硬化，促使冲击后接头各区域的表面硬度明显提高，冲击后接头热机械影响区和热影响区硬度提高达60%以上；腐蚀浸泡试验发现，超声冲击后接头的点腐蚀程度较超声冲击前明显减缓，腐蚀速率约是冲击前的1/2。结论 超声冲击有效改善了铝合金搅拌摩擦焊接头区域材料过时效的软化现象，并且有效改善了接头的抗腐蚀性能。 |
| 英文摘要: |
| The paper aims to analyze the effects of ultrasonic impact on joint structure and corrosion resistance of aluminum alloy joint after friction stir weld. UIT was firstly applied to the surface of 2A12 aluminum alloy friction stir welded joint. The microstructure, micro-hardness and corrosion resistance of the joints before and after UIT were analyzed. A layer of plastic deformation was observed on the surface of the joints after UIT, and the dislocation density in the plastic layer was increased, leading to work hardening and surface hardness increase. The hardness of the thermo-mechanical affected zone (TMAZ) and heat-affected zone (HAZ) of the joint was increased by more than 60%. Immersion test results showed that the corrosion rate was halved after UIT. Therefore, it can be concluded that UIT can effectively improve the hardness of friction stir welded aluminum alloy, and improve the corrosion resistance as well. |
|
View Full Text
View/Add Comment Download reader |
| Close |
渝公网安备 50010702501719号