肖博,张振林,麻思达,等.热循环、腐蚀和自然时效对 2024 铝合金搅拌摩擦焊接头力学性能的影响[J].精密成形工程,2015,7(5):59-64.
XIAO Bo,ZHANG Zhen-lin,MA Si-da,et al.Effects of Thermal Cycles, Corrosion, and Natural Aging on the Mechanical Properties of Friction Stir Welded Al2024 Joints[J].Journal of Netshape Forming Engineering,2015,7(5):59-64. |
| 热循环、腐蚀和自然时效对 2024 铝合金搅拌摩擦焊接头力学性能的影响 |
| Effects of Thermal Cycles, Corrosion, and Natural Aging on the Mechanical Properties of Friction Stir Welded Al2024 Joints |
| 投稿时间：2015-08-12 修订日期：2015-09-10 |
| DOI：10.3969/j.issn.1674-6457.2015.05.009 |
| 中文关键词: 搅拌摩擦焊 热循环 接头腐蚀 自然时效 力学性能 |
| 英文关键词: friction stir welding thermal cycle corrosion natural aging mechanical properties |
| 基金项目:中央高校基本科研业务费专项资金(3102014JC02010404); 凝固技术国家重点实验室自主课题(108-QP-2014) |
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| 中文摘要: |
| 研究了焊接过程中热循环、焊后腐蚀和自然时效对 2024 铝合金搅拌摩擦焊(FSW)接头力学性能的影响。 结果表明,同一焊缝不同位置的力学性能存在一定的差异,靠近插入点位置的屈服强度和抗拉强度明显低于其他位置,之后不断升高,趋于稳定,屈服强度和抗拉强度的最大值分别约为 310 MPa 和 415 MPa;随着自然时效时间的增加,接头屈服强度和抗拉强度在前 2 个月增长较快,增长率最大分别为 2% 和 1. 5% ,之后趋于稳定,而伸长率的增长率先较快,增长率最大为 6% ,之后变缓;在不同的自然时效时间下,腐蚀均明显降低 2024 铝合金 FSW 接头的屈服强度、抗拉强度和伸长率,减小率的最大值分别为 6. 5% ,6. 1% 和 19. 8% ;随着自然时效时间的增加,腐蚀后接头的力学性能下降更严重。 |
| 英文摘要: |
| The influence of welding thermal cycle and the interaction of post-weld corrosion and natural aging on mechanical properties of Al2024 joints welded by friction stir welding (FSW) were studied. The results show that the mechanical properties at different positions of the same weld are different. The yield stress and ultimate tensile strength (UTS) are lower in the starting position of the welded joint compared with other parts of the joint, and then they increase in the advancing direction of the stir tool, finally they keep stable at the last welding stage. The maximum values of yield stress and UTS are approximately 310 MPa and 415 MPa, respectively. The yield stress and UTS of the joints significantly increase during the first two months of natural aging and tend to be stable after that, the maximum values of growth rate are approximately 2% and 1. 5% , respectively. While the elongation increases at first, and then is stable, the maximum growth rate of elongation is approximately 6% . After corrosion, the yield stress and UTS of joints are decreased at different natural aging times as well as the elongation. The maximum values of reducing rate are approximately 6. 5% , 6. 1% , and 19. 8% , respectively. The tensile properties of Al 2024 joints after corrosion decrease with increasing the natural aging time. |
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