The sound LD2 Al alloy/0Cr18Ni9 stainless steel dissimilar metal joint was achieved by inertia friction welding. The joint strength after post-welding processing could reach 96% of that of the aluminum alloy base metal. The process study was conducted on the sound Al/steel joint. The interface microstructure, tightness, pressure-bearing capacity, and the hardness of the joints before and after the high/low-temperature were comparatively analyzed. The results show that the optimized welding process can obtain defect-free Al/steel dissimilar metal joints. The distribution of the interface intermetallic compounds (IMCs) layer was uniform and continuous, with the thickness of about 500 ~ 600 nm. The element diffusion was observed at the joint interface, with the generation of Si rich FeAlx phase. The joint fracture type was the mixed fracture dominated by ductile fracture. The joints showed sound tightness and pressure-bearing capacity. After the high/low temperature cycling tests, the interface microstructure, tightness, and pressure-bearing capacity of the joints were barely changed. Compared with the initial joints and the joints after the low temperature cycling test, the hardness of LD2 Al alloy increased by about 10% due to aging strengthening.
ZHAO Yanhua
,
ZHANG Lina
,
CAI Jingqing
,
WANG Wei
,
GUO Shengbin
,
SHEN Yan
. LD2 Al alloy and stainless steel inertia friction welding and high/low temperature cycling tests[J]. Transactions of The China Welding Institution, 2023
, 44(8)
: 123
-128
.
DOI: 10.12073/j.hjxb.20221008002
[1] 朱瑞灿, 赵衍华, 王浩, 等. 铝/钢异种金属旋转摩擦焊接研究现状[J]. 焊接, 2020(12): 1-9
Zhu Ruican, Zhao Yanhua, Wang Hao, et al. Research status of rotary friction welding of aluminum/steel dissimilar metals[J]. Welding & Joining, 2020(12): 1-9
[2] Mo S, Dong S, Zhu H, et al. Corrosion behavior of aluminum/steel dissimilar metals friction stir welding joint[J]. China Welding, 2021, 30(3): 20-30.
[3] 刘涛, 高嵩, 肖光春, 等. 附加超声对6061-T6铝合金/Q235钢搅拌摩擦焊搭接工艺优化[J]. 焊接学报, 2022, 43(5): 69-75
Liu Tao, Gao Song, Xiao Guangchun, et al. Process optimization on friction stir lap welding of 6061-T6 aluminum alloy/Q235 steel with ultrasonic vibration[J]. Transactions of the China Welding Institution, 2022, 43(5): 69-75
[4] Liu Y, Zhao H, Peng Y, et al. Microstructure characteristics and tensile strength of aluminum/stainless steel joint welded by inertia friction[J]. Rare Metal Materials and Engineering, 2021, 50(3): 795-801.
[5] Ma H, Zhao Y, Qin G, et al. Formation of nanoscale reaction layer with several crystallinities in the friction-welded 6061 Al alloy/steel joint[J]. Materials & Design, 2022, 219: 110742.
[6] 赵衍华, 张丽娜, 孙秀京, 等. LF6铝合金与不锈钢异种金属惯性摩擦焊工艺技术研究[J]. 宇航材料工艺, 2016, 46(5): 68-71
Zhao Yanhua, Zhang Lina, Sun Xiujing, et al. Inertia friction welding between LF6 aluminum and stainless steel[J]. Aerospace Materials & Technology, 2016, 46(5): 68-71
[7] 张丽娜, 赵衍华, 张田仓, 等. 2219铝合金与不锈钢惯性摩擦焊接接头组织与力学性能[J]. 电焊机, 2017, 47(11): 100-105
Zhang Lina, Zhao Yanhua, Zhang Tiancang, et al. Microstructure and mechanical properties of inertia friction welded joint between 2219 aluminum alloy and stainless steel[J]. Electric Welding Machine, 2017, 47(11): 100-105
[8] Lee W, Bang K, Jung S. Effects of intermetallic compound on the electrical and mechanical properties of friction welded Cu/Al bimetallic joints during annealing[J]. Journal of Alloys and Compounds, 2005, 390(1-2): 212-219.
[9] Zhang D, Qin G, Ma H, et al. Non-uniformity of intermetallic compounds and properties in inertia friction welded joints of 2A14 Al alloy to 304 stainless steel[J]. Journal of Manufacturing Processes, 2021, 68: 834-842.
[10] Kimura M, Iijima T, Kusaka M, et al. Joining phenomena and tensile strength of friction welded joint between Ti-6Al-4V titanium alloy and low carbon steel[J]. Journal of Manufacturing Processes, 2016, 24: 203-211.
[11] Ma H, Qin G, Dang Z, et al. Interfacial microstructure evolution and mechanical properties of inertia friction welded aluminium alloy/stainless steel joint with preheat treatment[J]. Materials Science and Engineering: A, 2022, 836: 142671.
[12] 潘春旭, 胡伦骥. 铝基复合材料─不锈钢摩擦焊焊接接头显微组织的电镜研究[J]. 中国机械工程, 1996, 7(6): 98-100
Pan Chunxu, Hu Lunji. EM study of microstructures in Al-MMC/stainless steel friction joint[J]. China Mechanical Engineering, 1996, 7(6): 98-100
[13] 冯健, 韩靖, 张雪梅, 等. 7A04铝合金/304不锈钢连续驱动摩擦焊及焊后热处理[J]. 焊接学报, 2018, 39(8): 11-17
Feng Jian, Han Jing, Zhang Xuemei, et al. Continuous drive friction welding and post welding heat treatment of 7A04 aluminum alloy and 304 stainless steel[J]. Transactions of the China Welding Institution, 2018, 39(8): 11-17
