Effect of Pre- and Post-Weld Heat Treatment on Microstructure and Properties of 2195 Al-Li Alloy Double-Sided Friction Stir Welded Joints
摘 要
采用双面搅拌摩擦焊方法对6 mm厚2195铝锂合金板进行焊接,对比研究了焊前与焊后热处理(410 ℃×1 h退火+510 ℃×1 h固溶+155℃×1 h人工时效)对接头显微组织及力学性能的影响。结果表明:焊前热处理的接头焊核区晶粒呈细小等轴状,平均晶粒尺寸约为9.2μm,而焊后热处理的焊核区晶粒发生了异常长大现象,平均晶粒尺寸达到0.3 mm。焊前热处理接头的抗拉强度比焊后热处理条件下的接头高约4.7%,断后伸长率也得到明显提高,且焊前热处理接头的拉伸断裂方式为韧性断裂,焊后热处理接头的拉伸断裂方式为脆性断裂。焊前热处理接头的最大弯曲角度大于焊后热处理接头,具有良好的塑性变形能力。
Abstract
6 mm thick 2195 aluminum-lithium alloy plates were connected by double-sided friction stir welding. The effects of pre- and post-weld heat treatment(410 ℃×1 h annealing + 510 ℃×1 h solution and 155 ℃×1 h artificial aging) on the microstructure and mechanical properties of joints were compared and studied. The results show that the grains in the weld nugget area of the joint with pre-weld heat treatment were small and equiaxed, and the average grain size was about 9.2 μm. The grains in the weld nugget area with post-weld heat treatment grew abnormally, and the average grain size reached 0.3 mm. The tensile strength of the joint with pre-weld heat treatment was about 4.7% higher than that with post-weld heat treatment, and the percentage elongation after fracture was improved obviously. The tensile fracture mode of the joint with pre-weld heat treatment was ductile fracture, and that with post-weld heat treatment was brittle fracture. The maximum bending angle of the joint with pre-weld heat treatment was larger than the joint with post-weld heat treatment, indicating the joint had good plastic deformation ability.
中图分类号 TG453.9 DOI 10.11973/jxgccl202202012
所属栏目 材料性能及应用
基金项目 上海市自然科学基金资助项目(20ZR1422600)
收稿日期 2020/12/29
修改稿日期 2021/12/15
网络出版日期
作者单位点击查看
备注张骥俊(1997-),男,上海人,硕士研究生
引用该论文: ZHANG Jijun,CAO Juyong,XING Yanfeng,ZHANG Chengcong. Effect of Pre- and Post-Weld Heat Treatment on Microstructure and Properties of 2195 Al-Li Alloy Double-Sided Friction Stir Welded Joints[J]. Materials for mechancial engineering, 2022, 46(2): 75~80
张骥俊,曹菊勇,邢彦锋,张成聪. 焊前和焊后热处理对2195铝锂合金双面搅拌摩擦焊接头组织与性能的影响[J]. 机械工程材料, 2022, 46(2): 75~80
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】李劲风,郑子樵,陈永来,等.铝锂合金及其在航天工业上的应用[J].宇航材料工艺,2012,42(1):13-19.LI J F,ZHENG Z Q,CHEN Y L,et al.Al-Li alloys and their application in aerospace industry[J].Aerospace Materials & Technology,2012,42(1):13-19.
【2】方文鹏,杜晓伟,潘庆军.新技术在铝锂合金焊接中的应用[J].现代焊接,2008(2):17-19.FANG W P,DU X W,PAN Q J.Application of new technology in aluminum-lithium alloy welding [J].Modern Welding Technology,2008(2):17-19.
【3】LEE H S,YOON J H,YOO J T,et al.Friction stir welding process of aluminum-lithium alloy 2195 [J].Procedia Engineering,2016,149:62-66.
【4】MISHRA R S,MA Z Y.Friction stir welding and processing[J].Materials Science and Engineering:R:Reports,2005,50(1/2):1-78.
【5】ZHANG D D,QU W Q,LV Q B,et al.Mechanical behaviour of Al-Li alloy joints by different friction stir welding parameters[J].Advanced Materials Research,2014,1051:799-807.
【6】WU Y,MAO H,YANG Q B,et al.Effect of welding parameters on defects and fracture behavior of friction stir welded 2195-T8 Al-Li alloy joints[J].Materials Science Forum,2018,913:182-189.
【7】陈向荣,郑子樵,叶志豪,等.2099铝锂合金搅拌摩擦焊接头的微观组织[J].稀有金属材料与工程,2018,47(6):1786-1792.CHEN X R,ZHENG Z Q,YE Z H,et al.Microstructure characterization of friction stir welded 2099 Al-Li alloy[J].Rare Metal Materials and Engineering,2018,47(6):1786-1792.
【8】HATAMLEH O.The effects of laser peening and shot peening on mechanical properties in friction stir welded 7075-T7351 aluminum [J].Journal of Materials Engineering and Performance,2008,17(5):688-694.
【9】ZHANG J,FENG X S,GAO J S,et al.Effects of welding parameters and post-heat treatment on mechanical properties of friction stir welded AA2195-T8 Al-Li alloy[J].Journal of Materials Science & Technology,2018,34(1):219-227.
【10】GAO C,GAO R Q,MA Y.Microstructure and mechanical properties of friction spot welding aluminium-lithium 2A97 alloy[J].Materials & Design,2015,83:719-727.
【11】LIN Y,LU C G,WEI C Y,et al.Influences of friction stir welding and post-weld heat treatment on Al-Cu-Li alloy[J].Advanced Engineering Materials,2018,20(2):1700652.
【12】戴明亮,万心勇,彭熠,等.新型热处理工艺对搅拌摩擦焊接头性能的影响[J].西安交通大学学报,2017,51(8):136-141.DAI M L,WAN X Y,PENG Y,et al.Effects of a new post-weld heat treatment process on the properties of friction stir welded joints[J].Journal of Xi'an Jiaotong University,2017,51(8):136-141.
【13】CHEN K,GAN W,OKAMOTO K,et al.The mechanism of grain coarsening in friction-stir-welded AA5083 after heat treatment[J].Metallurgical and Materials Transactions A,2011,42(2):488-507.
【14】刘大海,宗崇文,黎俊初,等.热处理对2A12铝合金搅拌摩擦焊板件时效成形的影响[J].材料热处理学报,2015,36(6):71-77.LIU D H,ZONG C W,LI J C,et al.Effects of heat treatment on creep age forming formability of friction stir welded 2A12 aluminum alloy sheet[J].Transactions of Materials and Heat Treatment,2015,36(6):71-77.
【2】方文鹏,杜晓伟,潘庆军.新技术在铝锂合金焊接中的应用[J].现代焊接,2008(2):17-19.FANG W P,DU X W,PAN Q J.Application of new technology in aluminum-lithium alloy welding [J].Modern Welding Technology,2008(2):17-19.
【3】LEE H S,YOON J H,YOO J T,et al.Friction stir welding process of aluminum-lithium alloy 2195 [J].Procedia Engineering,2016,149:62-66.
【4】MISHRA R S,MA Z Y.Friction stir welding and processing[J].Materials Science and Engineering:R:Reports,2005,50(1/2):1-78.
【5】ZHANG D D,QU W Q,LV Q B,et al.Mechanical behaviour of Al-Li alloy joints by different friction stir welding parameters[J].Advanced Materials Research,2014,1051:799-807.
【6】WU Y,MAO H,YANG Q B,et al.Effect of welding parameters on defects and fracture behavior of friction stir welded 2195-T8 Al-Li alloy joints[J].Materials Science Forum,2018,913:182-189.
【7】陈向荣,郑子樵,叶志豪,等.2099铝锂合金搅拌摩擦焊接头的微观组织[J].稀有金属材料与工程,2018,47(6):1786-1792.CHEN X R,ZHENG Z Q,YE Z H,et al.Microstructure characterization of friction stir welded 2099 Al-Li alloy[J].Rare Metal Materials and Engineering,2018,47(6):1786-1792.
【8】HATAMLEH O.The effects of laser peening and shot peening on mechanical properties in friction stir welded 7075-T7351 aluminum [J].Journal of Materials Engineering and Performance,2008,17(5):688-694.
【9】ZHANG J,FENG X S,GAO J S,et al.Effects of welding parameters and post-heat treatment on mechanical properties of friction stir welded AA2195-T8 Al-Li alloy[J].Journal of Materials Science & Technology,2018,34(1):219-227.
【10】GAO C,GAO R Q,MA Y.Microstructure and mechanical properties of friction spot welding aluminium-lithium 2A97 alloy[J].Materials & Design,2015,83:719-727.
【11】LIN Y,LU C G,WEI C Y,et al.Influences of friction stir welding and post-weld heat treatment on Al-Cu-Li alloy[J].Advanced Engineering Materials,2018,20(2):1700652.
【12】戴明亮,万心勇,彭熠,等.新型热处理工艺对搅拌摩擦焊接头性能的影响[J].西安交通大学学报,2017,51(8):136-141.DAI M L,WAN X Y,PENG Y,et al.Effects of a new post-weld heat treatment process on the properties of friction stir welded joints[J].Journal of Xi'an Jiaotong University,2017,51(8):136-141.
【13】CHEN K,GAN W,OKAMOTO K,et al.The mechanism of grain coarsening in friction-stir-welded AA5083 after heat treatment[J].Metallurgical and Materials Transactions A,2011,42(2):488-507.
【14】刘大海,宗崇文,黎俊初,等.热处理对2A12铝合金搅拌摩擦焊板件时效成形的影响[J].材料热处理学报,2015,36(6):71-77.LIU D H,ZONG C W,LI J C,et al.Effects of heat treatment on creep age forming formability of friction stir welded 2A12 aluminum alloy sheet[J].Transactions of Materials and Heat Treatment,2015,36(6):71-77.
相关信息