2219铝合金板材搅拌摩擦焊焊接接头局部力学性能研究
|
摘要
2219铝合金拼焊板焊接接头局部微区力学性能差异大,严重影响拼焊板的整体成形性能,为了构建拼焊板的整体成形损伤模型,预测成形破裂缺陷,有必要对搅拌摩擦焊拼焊板焊接接头的局部力学性能进行研究。针对焊接接头不同微区尺寸小,直接测量难度大的问题,提出显微组织分析与DIC测试相结合测试搅拌摩擦焊焊接接头局部力学性能的方法。首先通过微观组织分析与显微硬度测试相结合的方法确定了2219铝合金焊接接头各微区的形状和尺寸;其次通过DIC分析获得了2219铝合金焊接接头各微区在单向拉伸过程中应变变化情况;最后利用幂指数模型进行拟合,建立了拼焊板焊接接头各微区的局部力学性能模型。
The sharp changes in the local mechanical properties of welding joint seriously affect the forming performance of 2219 aluminum alloy tailor welded blanks. In order to establish the damage model for rupture predicting during forming process,the investigation on the local mechanical properties of welding joint of tailor welded blanks of friction stir welding( FSW) is necessary. As the direct measurement of microzone size of welding joint is difficult,the method combining the microstructure analysis and DIC to test the local mechanical properties of welding joint of FSW was proposed. For each microzone of 2219 welding joint,the shape and size which were firstly determined through microstructure analysis and microhardness test,and then the strain change during the uniaxial tensile test was obtained through the DIC analysis. Finally,the power exponential model was used to fit the stress-strain curve,and the local mechanical properties models of each microzone of welding joint for tailor welded blanks were established.
The sharp changes in the local mechanical properties of welding joint seriously affect the forming performance of 2219 aluminum alloy tailor welded blanks. In order to establish the damage model for rupture predicting during forming process,the investigation on the local mechanical properties of welding joint of tailor welded blanks of friction stir welding( FSW) is necessary. As the direct measurement of microzone size of welding joint is difficult,the method combining the microstructure analysis and DIC to test the local mechanical properties of welding joint of FSW was proposed. For each microzone of 2219 welding joint,the shape and size which were firstly determined through microstructure analysis and microhardness test,and then the strain change during the uniaxial tensile test was obtained through the DIC analysis. Finally,the power exponential model was used to fit the stress-strain curve,and the local mechanical properties models of each microzone of welding joint for tailor welded blanks were established.
引文
[1]夏德顺.航天运载器贮箱结构材料工艺研究[J].导弹与航天运载技术,1999,(3):32-41.XIA Deshun. Technological research of tank structural matreial for launch vehicle[J]. Journal of Missiles and Space Vehicles,1999,(3):32-41.
[2]龙乐豪.中国运载火箭技术的成就与展望[J].中国航天,2001,(3):3-8.LONG Lehao. Achievements and prospects of China's launch vehicle technology[J]. Journal of Aerospace China,2001,(3):3-8.
[3]苑世剑.现代液压成形技术[J]. 2版.北京:国防工业出版社,2016.YUAN Shijian. Modern hydroforming technology[J]. The Second Edition. Beijing:National Defense Industry Press,2016.
[4]苑世剑,刘伟,徐永超.板材液压成形技术与装备新进展[J].机械工程学报,2015,51(8):20-28.YUAN Shijian,LIU Wei,XU Yongchao. New development on technology and equipment of sheet hydroforming[J]. Journal of Mechanical Engineering,2015,51(8):20-28.
[5]陈一哲. 2219铝合金薄壁曲面件液压成形起皱行为与变形均匀性研究[D].哈尔滨:哈尔滨工业大学,2017.CHEN Yizhe. Wrinkling behavior and uniform deformation during hydroforming of 2219 aluminum alloy curved shell[D]. Harbin:Harbin Institute of Technology,2017.
[6] FRANCHIM A S,FEMANDEZ F F. Microstructural aspects and mechanical properties of friction stir welded AA2024-T3 aluminium alloy sheet[J]. Materials and Design,2011,32(10):4684-4688.
[7]郝云飞,王国庆,周庆,等.运载火箭铝合金贮箱全搅拌摩擦焊接工艺及应用[J].宇航材料工艺,2016,46(6):11-20.HAO Yunfei,WANG Guoqing,ZHOU Qing,et al. Application of all friction stir welding technology on the launch vehicle tank[J]. Journal of Aerospace Materials&Technology,2016,46(6):11-20.
[8] WANG Z B,HE Z B,FAN X B,et al. High temperature deformation behavior of friction stir welded 2024-T4 aluminum alloy sheets[J]. Journal of Materials Processing Technology,2017,247:184-191.
[9]徐永超,周斌军,周久红.不锈钢外板对2219铝合金拼焊板胀形性能的影响[J].精密成形工程,2016,8(5):65-70.XU Yongchao,ZHOU Binjun,ZHOU Jiuhong. Effects of outside sheet on the bulging properties of inside 2219 aluminum FSW sheet[J]. Journal of Netshape Forming Engineering,2016,8(5):65-70.
[2]龙乐豪.中国运载火箭技术的成就与展望[J].中国航天,2001,(3):3-8.LONG Lehao. Achievements and prospects of China's launch vehicle technology[J]. Journal of Aerospace China,2001,(3):3-8.
[3]苑世剑.现代液压成形技术[J]. 2版.北京:国防工业出版社,2016.YUAN Shijian. Modern hydroforming technology[J]. The Second Edition. Beijing:National Defense Industry Press,2016.
[4]苑世剑,刘伟,徐永超.板材液压成形技术与装备新进展[J].机械工程学报,2015,51(8):20-28.YUAN Shijian,LIU Wei,XU Yongchao. New development on technology and equipment of sheet hydroforming[J]. Journal of Mechanical Engineering,2015,51(8):20-28.
[5]陈一哲. 2219铝合金薄壁曲面件液压成形起皱行为与变形均匀性研究[D].哈尔滨:哈尔滨工业大学,2017.CHEN Yizhe. Wrinkling behavior and uniform deformation during hydroforming of 2219 aluminum alloy curved shell[D]. Harbin:Harbin Institute of Technology,2017.
[6] FRANCHIM A S,FEMANDEZ F F. Microstructural aspects and mechanical properties of friction stir welded AA2024-T3 aluminium alloy sheet[J]. Materials and Design,2011,32(10):4684-4688.
[7]郝云飞,王国庆,周庆,等.运载火箭铝合金贮箱全搅拌摩擦焊接工艺及应用[J].宇航材料工艺,2016,46(6):11-20.HAO Yunfei,WANG Guoqing,ZHOU Qing,et al. Application of all friction stir welding technology on the launch vehicle tank[J]. Journal of Aerospace Materials&Technology,2016,46(6):11-20.
[8] WANG Z B,HE Z B,FAN X B,et al. High temperature deformation behavior of friction stir welded 2024-T4 aluminum alloy sheets[J]. Journal of Materials Processing Technology,2017,247:184-191.
[9]徐永超,周斌军,周久红.不锈钢外板对2219铝合金拼焊板胀形性能的影响[J].精密成形工程,2016,8(5):65-70.XU Yongchao,ZHOU Binjun,ZHOU Jiuhong. Effects of outside sheet on the bulging properties of inside 2219 aluminum FSW sheet[J]. Journal of Netshape Forming Engineering,2016,8(5):65-70.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |