定量研究2024-T351铝合金搅拌摩擦焊过程中的时效相行为
Quantitative Investigation on Aging Phase Behavior for 2024-T351 Aluminum Alloy during Friction Stir Welding Process
摘 要
采用差示扫描量热法研究了2024-T351铝合金搅拌摩擦焊接过程中时效相回溶或粗化的相对值, 给出了一种定量研究搅拌摩擦焊接过程中时效相行为的方法。结果表明: 相对于母材, 焊缝不同区域时效相的回溶或粗化值可通过公式f=Sx/SBM-1来计算;当搅拌摩擦焊搅拌头转速为700 r·min-1, 焊接速度为200 mm·min-1时, 2024-T351铝合金焊缝轴肩作用区的S相对于母材的回溶值为23.3%, 同时硬度相对于母材下降了23.8%; S相发生回溶或粗化主要取决于焊接热量的高低。
搅拌摩擦焊
差示扫描量热
时效相
2024-T351 aluminum alloy
friction stir welding
differential scanning calormetry
aging phase
Abstract
The relative value of dissolution or coarse for aging phases in 2024-T351 aluminum alloy during friction stir welding (FSW) process was characterized by differential scanning calorimetry (DSC) method, and a quantitative method to investigate the aging phase behavior during FSW process was revealed. The results show that the dissolution or coarse relative value of aging phases in welded zone of 2024-T351 aluminum alloy could be obtained by formula of f=Sx/SBM-1. Compared with the base metal, the dissolution relative value of S phase in the shoulder active zone (SAZ) of 2024-T351 aluminum alloy was 23.3% when the rotary speed of 700 r·min-1 and welding speed of 200 mm·min-1, and the hardness decreased 23.8%. The dissolution or coarse of S phase depended on the thermal profile generated by FSW.
中图分类号 TG146.2
所属栏目
基金项目 航空科学重点基金资助项目(2009ZE25007)
收稿日期 2010/10/12
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备注康举(1983-),男,硕士。
引用该论文: KANG Ju,FU Rui-dong,LUAN Guo-hong. Quantitative Investigation on Aging Phase Behavior for 2024-T351 Aluminum Alloy during Friction Stir Welding Process[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2011, 47(4): 199～203
康举,付瑞东,栾国红. 定量研究2024-T351铝合金搅拌摩擦焊过程中的时效相行为[J]. 理化检验－物理分册, 2011, 47(4): 199～203
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参考文献
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【4】刘志义,李云涛,刘延斌,等. Al-Cu-Mg-Ag合金析出相的研究进展[J]. 中国有色金属学报,2007,17(12):1905-1915.
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【7】XU W F,LIU J H,LUAN G H,et al. Temperature evolution,microstructure and mechanical properties of friction stir welded thick 2219-O aluminum alloy joints[J]. Materials and Design,2009(30):1886-1893.
【8】CAO G,KOU S. Friction stir welding of 2219 aluminum: behavior of θ (Al2Cu) particles[J]. Welding Journal,2005(1):1-8.
【9】KHANDKAR M,KHAN J,REYNOLDS A. Prediction of temperature distribution and thermal history during friction stir welding:input torque based model[J]. Science and Technology of Welding and Joining,2003,8:165-174.
【10】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(2):620-626.
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【12】YUTAKA S S,MITSUNORI U,HIROYUKI K,et al. Hall-Petch relationship in friction stir welds of equal channel angular-pressed aluminium alloys[J]. Materials Science and Engineering A,2003,354(1):298-305.
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