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爆炸焊接Al-Fe啮合界面的微观结构和力学性能 预览

Microstructure and mechanical properties of Al-Fe meshing bonding interfaces manufactured by explosive welding
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摘要 为了提高Al-Fe爆炸焊接界面的力学性能,通过在基板上预制燕尾槽的方法获得啮合型结合界面,并系统研究啮合界面的微观结构和力学性能。微观结构观察表明,啮合界面实现了没有孔洞的冶金结合,结合方式为直接结合和熔化区结合。拉伸样品断面表明,在界面附近钢侧为解理断裂而铝侧为延性断裂。拉剪测试结果表明,相比于普通的铝钢爆炸焊接界面,0°和90°啮合界面的剪切强度分别提高11%和14%。随着离界面距离的增加,界面两侧金属显微硬度值逐渐下降。由于存在脆性Fe-Al化合物,在三点弯曲试验中界面出现裂缝。 In order to improve the mechanical properties of Al.Fe transition joints manufactured by explosive welding,meshing bonding interfaces were obtained by prefabricating dovetail grooves in base plates.The microstructure and mechanical properties of the meshing interfaces were systematically investigated.The microstructure observation showed that metallurgical bonding without pores was created in the form of direct bonding and melting zone bonding at the interface.Fractography on tensile specimens showed cleavage fracture on the steel side and ductile fracture on the aluminum side near the interfaces.The tensile shear test results indicated that the shear strength of the meshing interface 0°and 90°was increased by 11%and 14%,respectively,when being compared to that of the ordinary Al.Fe transition joints.The values of microhardness decreased as the distance from the interface increased.After three-point bending,cracks were observed at the bonding interface for some specimens due to the existence of brittle Fe.Al compounds.
作者 杨明 马宏昊 沈兆武 陈代果 邓永兴 Ming YANG;Hong-hao MA;Zhao-wu SHEN;Dai-guo CHEN;Yong-xin DENG(CAS Key Laboratory of Mechanical Behavior and Design of Materials,University of Science and Technology of China,Hefei 230026,China;State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026,China)
出处 《中国有色金属学报:英文版》 SCIE EI CAS CSCD 2019年第4期680-691,共12页 Transactions of Nonferrous Metals Society of China
基金 Projects(51674229,51374189)the National Natural Science Foundation of China Project(WK2480000002)Fundamental Research Funds for Central Universities,China.
关键词 爆炸焊接 啮合界面 不锈钢 explosive welding meshing interface aluminum stainless steel
作者简介 Corresponding author: Hong-hao MA;Tel:+86-17755131576;E-mail: hhma@ustc.edu.cn.
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