焊接参数对7075铝合金搅拌摩擦焊接头组织及腐蚀行为的影响
Effect of Processing Parameters on Microstructure and Corrosion Behavior of Friction Stir Welded 7075 Aluminum Alloy
摘 要
不同参数下对1.6 mm厚7075铝合金板进行了搅拌摩擦焊接, 在分析了焊缝表面组织的基础上, 采用浸泡试验对焊缝表面的腐蚀行为进行研究, 讨论了硬度分布与腐蚀发生的关系。结果表明, 焊后轴肩作用区晶粒细化明显。随转速的增加, 焊缝上表面热机械影响区范围加宽、轴肩作用区硬度增大。焊缝上表面腐蚀最严重的区域为轴肩作用区, 在EXCO溶液中浸泡4 h后发生明显的剥落腐蚀, 剥蚀以轴肩作用区为中心向两边扩展。接头硬度的软化区是腐蚀发生较严重的区域。
搅拌摩擦焊(FSW)
微观组织
显微硬度
剥落腐蚀
7075 aluminum alloy
friction stir welding
microstructure
micro-hardness
exfoliation corrosion
Abstract
Friction stir welding (FSW) for 1.6 mm thickness 7075 aluminum alloy sheets with different processing parameters was carried out. Based on the analysis of the microstructures of the joint surface, the corrosion behavior was investigated by immersion test. The correlation between the micro-hardness distribution and the corrosion was discussed. The results showed that the grains in the shoulder active zone (SAZ) were obviously refined with the increase of the rotational speed. The spans of the thermomechanically-affected zone (TMAZ) widened and the hardness in the SAZ increased with the increase of the rotation speed. The SAZ corroded worse than other regions. Exfoliation corrosion attack occurred predominantly in the SAZ after being immersed for 4 hours in EXCO solution, and the exfoliation corrosion extended from the SAZ to heat-affected zone. The hardness softened zone was the corrosion sensitive region.
中图分类号 TG172
所属栏目 试验研究
基金项目 航空科学重点基金项目(2009ZE25007)
收稿日期 2010/10/12
修改稿日期 2010/11/22
网络出版日期
作者单位点击查看
备注康举, 硕士研究生,
引用该论文: KANG Ju,LUAN Guo-hong,LI Guang,DONG Chun-lin,FU Rui-dong. Effect of Processing Parameters on Microstructure and Corrosion Behavior of Friction Stir Welded 7075 Aluminum Alloy[J]. Corrosion & Protection, 2011, 32(7): 507
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参考文献
【1】Matrukanitz R P. Selection and weldability of heat-treatable aluminum alloys[C]//ASM Handbook-Welding, Brazing and Soldering. ASM Int, 1990:528-536.
【2】王希靖, 孙桂苹, 张杰, 等. 焊后热处理对高强铝合金搅拌摩擦焊接头的影响[J]. 中国有色金属学报, 2009, 20(3):484-498.
【3】Mishra R S, Ma Z Y. Friction stir welding and processing[J]. Materials Science and Engineering R, 2005(50):1-78.
【4】付瑞东, 栾国红, 董春林, 等. 酸性盐雾中7075铝合金搅拌摩擦焊接头的腐蚀行为[J]. 腐蚀科学与防护技术, 2009, 21:580-585.
【5】Jariyaboon M, Davenport A J, Ambat R, et al. The effect of welding parameters on the corrosion behaviour of friction stir welded AA2024-T351[J]. Corrosion Science, 2007, 49:877-909.
【6】Omar H. Effects of peening on mechanical properties in friction stir welded 2195 aluminum alloy joints[J]. Materials Science and Engineering A, 2008, 492:168-176.
【7】ASTM G34-01. Standard test method for exfoliation corrosion susceptibility in 2××× and 7××× series aluminum alloys (EXCO Test)[S].
【8】Kang J, Fu R D, Luan G H, et al. In-situ investigation on the pitting corrosion behavior of friction stir welded joint of AA2024-T3 aluminium alloy[J]. Corrosion Science, 2010(52):620-626.
【9】栾国红, 付瑞东, 董春林, 等. 中性盐雾下7075铝合金搅拌摩擦焊焊缝的腐蚀行为[J]. 中国腐蚀与防护学报, 2010, 30(3):236-240.
【10】Yang B S, Yan J H, Michael S A, et al. Banded microstructure in AA2024-T351 and AA2524-T351 aluminum friction stir welds.Part I:metallurgical studies[J]. Materials Science and Engineering A, 2004, 364:55-65.
【11】Yutaka S S, Mitsunori U, Hiroyuki K. Hall-Petch relationship in friction stir welds of equal channel angular-pressed aluminium alloys[J]. Materials Science and Engineering A, 2003, 354:298-305.
【12】Cao G, Kou S. Friction stir welding of 2219 aluminum: behavior of θ (Al2Cu) particles[J]. Welding Journal, 2005(1):1-8.
【13】朱日彰. 金属腐蚀学[M]. 北京:冶金工业出版社, 1989.
【2】王希靖, 孙桂苹, 张杰, 等. 焊后热处理对高强铝合金搅拌摩擦焊接头的影响[J]. 中国有色金属学报, 2009, 20(3):484-498.
【3】Mishra R S, Ma Z Y. Friction stir welding and processing[J]. Materials Science and Engineering R, 2005(50):1-78.
【4】付瑞东, 栾国红, 董春林, 等. 酸性盐雾中7075铝合金搅拌摩擦焊接头的腐蚀行为[J]. 腐蚀科学与防护技术, 2009, 21:580-585.
【5】Jariyaboon M, Davenport A J, Ambat R, et al. The effect of welding parameters on the corrosion behaviour of friction stir welded AA2024-T351[J]. Corrosion Science, 2007, 49:877-909.
【6】Omar H. Effects of peening on mechanical properties in friction stir welded 2195 aluminum alloy joints[J]. Materials Science and Engineering A, 2008, 492:168-176.
【7】ASTM G34-01. Standard test method for exfoliation corrosion susceptibility in 2××× and 7××× series aluminum alloys (EXCO Test)[S].
【8】Kang J, Fu R D, Luan G H, et al. In-situ investigation on the pitting corrosion behavior of friction stir welded joint of AA2024-T3 aluminium alloy[J]. Corrosion Science, 2010(52):620-626.
【9】栾国红, 付瑞东, 董春林, 等. 中性盐雾下7075铝合金搅拌摩擦焊焊缝的腐蚀行为[J]. 中国腐蚀与防护学报, 2010, 30(3):236-240.
【10】Yang B S, Yan J H, Michael S A, et al. Banded microstructure in AA2024-T351 and AA2524-T351 aluminum friction stir welds.Part I:metallurgical studies[J]. Materials Science and Engineering A, 2004, 364:55-65.
【11】Yutaka S S, Mitsunori U, Hiroyuki K. Hall-Petch relationship in friction stir welds of equal channel angular-pressed aluminium alloys[J]. Materials Science and Engineering A, 2003, 354:298-305.
【12】Cao G, Kou S. Friction stir welding of 2219 aluminum: behavior of θ (Al2Cu) particles[J]. Welding Journal, 2005(1):1-8.
【13】朱日彰. 金属腐蚀学[M]. 北京:冶金工业出版社, 1989.
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