|
|
Efficacy of Intense Cooling for Controlling Residual Stress in Al-Li Alloys |
|
|
Abstract Choosing 2 mm thick Al-Ti alloy plate as the research object, temperature filed and residual stress of FSW were simulated by ABAQUS software under conditions of air cooling and intense cooling. The results of simulation were verified by experiments. Results show that the temperature field during welding presents an elliptical distribution, and the residual stresses perpendicular to the weld exhibits an "M" tendency. Meanwhile, the peak residual stresses are located at the edge of the shoulder zone. Compared with the air cooling condition, the peak stress on the upper surface of the AA2060 welded plate was reduced by 13%. At the same intense cooling distance, decreasing the intense cooling temperature increased the temperature gradient between the heat and cold sources, thereby leading to the decreased residual stresses.
|
Received: 21 September 2022
Published: 04 April 2023
|
Corresponding Authors:
Liang WeiHE
E-mail: sxxyhwl@sina.com
|
|
|
|
[1] 杨武雄,张心怡,肖荣诗.2060-T8/2099-T83铝锂合金T型接头双光束激光焊接工艺[J].中国激光,2013,40(07):89-93.[2] 周旭东,吴友发,陈帅,占小红.服役载荷下铝锂合金激光焊接T型接头残余应力的有限元分析[J].航空制造技术,2020,63(13):75-82.[3] 李帅贞,邢艳双,刘雪松. 转速对2060铝锂合金RFSSW接头成形及拉剪性能的影响[J]. 焊接学报, 2019, 040(010):156-160.[4] 林松,张坤,王卫兵,栾国红.2060铝锂合金FSW接头微观组织和力学性能[J].焊接学报,2017,38(06):101-104+133.[5] 孙景峰,郑子樵,林毅,等.2060合金FSW接头微观组织与力学性能[J].中国有色金属学报,2014,24(02):364-370.[6] He X , Gu F , Ball A . A review of numerical analysis of friction stir welding[J]. Progress in Materials Science, 2014, 65(10):1-66.[7] Giorgi M D , Scialpi A , Panella F W , et al. Effect of shoulder geometry on residual stress and fatigue properties of AA6082 FSW joints[J]. Journal of Mechanical ence & Technology, 2009, 23(1):26-35.[8] Staron P, Kocak M, Williams S, et al. Residual stresses in friction stir welded Al sheets[J]. Physica B: Condensed Matter, 2004, 350(1-3): 491–493.[9] Wen S W , Colegrove P A , Williams S W , et al. Rolling to control residual stress and distortion in friction stir welds[J]. Science & Technology of Welding & Joining, 2013, 15(6):440-447.[10] Sun T , Roy M J , Strong D , et al. Comparison of residual stress distributions in conventional and stationary shoulder high-strength aluminum alloy friction stir welds[J]. Journal of Materials Processing Technology, 2017, 242(11):92-100.[11] 姬书得,温泉,吕赞,杨占鹏.激冷影响TC4钛合金FSW残余应力与变形的规律[J].中国机械工程,2016,27(04):531-536+543.[12] 刘日明,孙成凯,党青敏,刘书华. 搅拌摩擦焊工具的研究现状[J].机械设计与制造,2004,4 (2):45-46.[13] 余建新,王晓鹏. 高温高强钨铼合金Gleeble热力模拟试验方法探讨[J].物理测试, 2021, 39(5):20-25.[14] 李红克,史清宇,赵海燕.热量自适应搅拌摩擦焊热源模型[J].焊接学报,2006,27(11):81-85. |
|
|
|