7005铝合金CMT、TIG和FSW焊接接头组织与性能对比研究
Microstructure and Properties of 7005 Aluminum Alloy Welded Joints by CMT, TIG and FSW
摘要: 分别对2 mm厚的7005铝合金进行冷金属过渡(Cold metal transition welding, CMT)焊、钨极惰性气体保护(Tungsten inert gas, TIG)焊与搅拌摩擦焊接(Friction stir welding, FSW)，对比分析了3种焊接工艺下接头的微观组织、力学性能和应力腐蚀性能。结果表明：3种工艺都能获得无缺陷的接头。CMT和TIG焊核区晶粒粗大，FSW焊核区为等轴细晶；常温拉伸试验中，FSW接头强度和塑性要优于CMT和TIG接头。CMT、TIG和FSW焊接样件ISSRT值分别为8.3%、9.2%和4.9%，表明7005铝合金FSW焊接接头的应力腐蚀敏感性更低。
Abstract: 2 mm thick 7005 aluminum alloy was subjected to cold metal transition welding (CMT), tungsten inert gas welding (TIG) and friction stir welding (FSW), respectively. The microstructure mechanical properties and stress corrosion properties of the CMT, TIG and FSW joints were investigated. The results showed that defect-free joints for CMT, TIG and FSW were acquired. For the CMT and TIG joint, the nugget zone (NZ) was characterized with coarsened grains, for the FSW nugget, the NZs was characterized with equaix fine grains. The strength and plasticity of FSW joint is better than that of CMT joint and TIG joint. The stress corrosion sensitivity index of CMT, TIG and FSW welded samples are 8.3%, 9.2% and 4.9%, respectively, indicating that the stress corrosion susceptibility of 7005 aluminum alloy FSW welded joints is lower.
文章引用：周青华, 刘州, 杜涛, 徐文玲, 许俊海. 7005铝合金CMT、TIG和FSW焊接接头组织与性能对比研究[J]. 材料科学, 2021, 11(4): 317-325. https://doi.org/10.12677/MS.2021.114038

参考文献

[1] 刘玉玲, 王晨, 张修庆. 热处理工艺对导电铝合金力学性能的影响[J]. 材料科学, 2019, 9(9): 854-860.
[2] 孔亚非, 郭孝云, 和淑文, 等. 固溶处理对半固态7075铝合金浆料组织的影响[J]. 材料科学, 2016, 6(6): 322-328.
[3] 蓝艳全, 杨昭, 林森, 等. Zn/Mg比对7003铝合金挤压型材组织与性能的影响[J]. 材料科学, 2020, 10(1): 1-8.
[4] 黄英, 邓运来, 陈龙, 等. 双级时效对7N01合金组织与性能的影响[J]. 材料科学, 2014, 4(3): 63-72.
[5] 赵龙, 叶凌英, 邓运来, 等. 回归再时效温度对Al-Zn-Mg合金性能的影响[J]. 材料科学, 2018, 8(5): 617-624.
[6] 商婷婷, 邓运来, 郭晓斌, 等. Cu含量对Al-5Zn-2.6Mg-xCu合金组织和性能的影响[J]. 材料科学, 2020, 10(4): 238-247.
[7] 王建军, 查小琴, 郑国华. 7×××系铝合金应力腐蚀开裂研究现状[J]. 轻合金加工技术, 2020(48): 9-15.
[8] 李春岭. 7075铝合金应力腐蚀开裂机理研究[D]: [硕士学位论文]. 镇江: 江苏科技大学, 2014.
[9] Zhang, Z., Deng, Y.L., Ye, L.Y., et al. (2020) Effect of Multi-Stage Aging Treatments on the Precipitation and Mechanical Properties of Al-Zn-Mg Alloys. Materials Science & Engineering A, 785, Article ID: 139394. [Google Scholar] [CrossRef] 
[10] Zhang, Z., Deng, Y.L., Ye, L.Y., et al. (2020) Influence of Aging Treatments on the Strength and Localized Corrosion Resistance of Aged Al-Zn-Mg-Cu Alloy. Journal of Alloys and Compounds, 846, Article ID: 156223. [Google Scholar] [CrossRef] 
[11] 唐鸿远, 张臻, 邓运来, 等. 基于灰色系统理论的Al-Zn-Mg合金板材疲劳寿命预测[J]. 上海交通大学学报, 2018, 52(2): 228-232.
[12] 吴建山, 邓运来, 张臻, 等. 加载方向对Al-Zn-Mg合金型材应力腐蚀开裂行为的影响[J]. 工程科学学报, 2019, 41(3): 350-358.
[13] 张臻, 邓运来, 郭辉, 等. 应变速率对Al-Zn-Mg合金室温拉伸性能的影响[J]. 功能材料, 2017, 48(7): 7215-7220.
[14] 罗先甫, 刘晓勇, 张文利, 等. 7020 铝合金在Cl-环境下的应力腐蚀与局部腐蚀性能及其相关性分析[J]. 材料保护, 2021, 54(1): 57-62.
[15] 杜娟, 李浩, 魏子明, 等. 慢应变速率拉伸下铝合金的缓蚀性能[J]. 材料科学与工程学报, 2020, 38(2): 301-307.
[16] 张满, 李年莲, 吕建强, 等. CMT焊接技术的发展现状[J]. 焊接, 2010(12): 25-32.
[17] 刘美娜. 新能源汽车电池包下壳体焊接工艺分析[J]. 生产现场, 2018(12): 37-42.

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