FeCuNiTiAl高熵合金中间层连接铝/钛异种金属电阻点焊接头的组织与力学性能

doi:10.3901/JME.2024.22.094

机械工程学报 ›› 2024, Vol. 60 ›› Issue (22): 94-105.doi: 10.3901/JME.2024.22.094

• 特邀专栏：异种材料焊接与连接 • 上一篇下一篇

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FeCuNiTiAl高熵合金中间层连接铝/钛异种金属电阻点焊接头的组织与力学性能

乔宇¹, 曹睿¹, 南灏², 闫英杰¹

1. 兰州理工大学有色金属先进加工与再利用省部共建国家重点实验室兰州 730050;
2. 中国钢研科技集团有限公司安泰科技股份有限公司北京 100081

收稿日期:2024-03-02 修回日期:2024-07-04 出版日期:2024-11-20 发布日期:2025-01-02
作者简介:乔宇,男,1998年出生。主要研究方向为异种金属焊接。E-mail:qiaoyuqiaochu@163.com;曹睿(通信作者),女,1977年出生,博士,教授,博士研究生导师。主要研究方向为新材料、异种材料的焊接性、强韧性、腐蚀、变形、损伤及断裂行为。E-mail:caorui@lut.edu.cn
基金资助:
国家自然科学基金(52175325)和甘肃省科技重大专项(22ZD6GA008)资助项目。

Microstructure and Mechanical Properties of Al/Ti Dissimilar Metal Resistance Spot Welded Joint with FeCuNiTiAl High Entropy Alloy Interlayer

QIAO Yu¹, CAO Rui¹, NAN Hao², YAN Yingjie¹

1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050;
2. Advanced Technology & Materials Co., Ltd., China Iron & Steel Research Institute Group, Beijing 100081

Received:2024-03-02 Revised:2024-07-04 Online:2024-11-20 Published:2025-01-02
About author:10.3901/JME.2024.22.094

摘要/Abstract

摘要： 采用电阻点焊焊接方法对表面预先激光熔覆FeCuNiTiAl高熵合金(High-entropy alloy，HEA)的TC4钛合金板与6061铝合金板进行搭接试验，研究焊接电流和焊接时间对焊接接头界面组织和力学性能的影响。结果表明，试验所采用的FeCuNiTiAl HEA在TC4钛合金板表面的润湿性良好，焊后接头界面处未产生Ti-Al金属间化合物。随着焊接电流和焊接时间的增加，熔核直径增大，但受铝板减薄量的影响，接头的抗拉剪载荷呈先上升后降低的趋势。当焊接电流为3.0 kA，焊接时间为1.0 s时，接头抗拉剪载荷达到峰值，可达4.1 kN。与Ti/Al接头相比，添加FeCuNiTiAl HEA后接头抗拉剪性能提高19.07%。焊接接头断裂方式包括三种形式：铝/HEA界面处剪切撕裂断裂、焊点周围以“纽扣”状断裂和焊点边缘沿母材断裂。大部分接头断裂于铝母材一侧，说明以FeCuNiTiAl HEA为中间层的6061铝合金与TC4钛合金的点焊接头焊接质量良好。

关键词: 铝/钛焊接接头, 电阻点焊, 高熵合金, 界面组织, 力学性能

Abstract: The TC4 titanium alloy plate with pre-laser cladding FeCuNiTiAl high-entropy alloy(HEA) and 6061aluminum alloy plate were lapped by resistance spot welding. The effects of welding current and welding time on the interface microstructure and mechanical properties of welded joints were investigated. The results show that the FeCuNiTiAl high-entropy alloy used in the experiment has good wettability on the surface of TC4 titanium alloy plate, and no Ti-Al intermetallic compound is produced at the interface of the joint after welding. With the increase of welding current and welding time, the nugget diameter increases, but the tensile shear load of the joint increases first and then decreases due to the influence of the thinning amount of the aluminum plate. When the welding current is 3.0 kA and the welding time is 1.0 s, the tensile shear load of the joint reaches a peak value of 4.1 kN. Compared with the Ti/Al joint, the tensile shear performance of the joint with FeCuNiTiAl HEA is improved by 19.07%.The fracture modes of the welded joint include three types: shear tearing fracture at the aluminum/HEA interface, “button” type fracture around the weld joint and fracture along the edge of the weld joint along the base metal. Most of the joints are fractured on the side of the aluminum base metal, indicating that the spot welding lap joint of 6061 aluminum alloy and TC4 titanium alloy with FeCuNiTiAl HEA as the intermediate layer has good welding quality.

Key words: aluminium/titanium welded joints, resistance spot welding, high-entropy alloy, interface microstructure, mechanical property

中图分类号:

TG438
TG457

乔宇, 曹睿, 南灏, 闫英杰. FeCuNiTiAl高熵合金中间层连接铝/钛异种金属电阻点焊接头的组织与力学性能[J]. 机械工程学报, 2024, 60(22): 94-105.

QIAO Yu, CAO Rui, NAN Hao, YAN Yingjie. Microstructure and Mechanical Properties of Al/Ti Dissimilar Metal Resistance Spot Welded Joint with FeCuNiTiAl High Entropy Alloy Interlayer[J]. Journal of Mechanical Engineering, 2024, 60(22): 94-105.

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FeCuNiTiAl高熵合金中间层连接铝/钛异种金属电阻点焊接头的组织与力学性能

Microstructure and Mechanical Properties of Al/Ti Dissimilar Metal Resistance Spot Welded Joint with FeCuNiTiAl High Entropy Alloy Interlayer

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