Evaluation of Tensile Shear Strength under Salt Spray Test on Dissimilar Metal Spot Welding of Aluminum Alloy and Galvannealed Steel Sheet

Applied Sciences

卷:10

Sung-Min Joo¹  Min-Suk Oh²  Young-Gon Kim³ 

[1] Department of Naval Architecture and Ocean Engineering, Chosun University, Gwangju 61452, Korea;

[2] Division of Advanced Materials Engineering, Jeonbuk National University, Jeonju 54896, Korea;

[3] Gwangju Ppuri Technology Support Center, Korea Institute of Industrial Technology, Gwangju 61012, Korea;

关键词: adhesive bonding;    corrosion;    DeltaSpot;    dissimilar material;    salt spray test;    tensile shear strength;   

DOI  :  10.3390/app10228116

来源: DOAJ

【 摘 要 】

In order to reduce the weight of parts in the automobile and electronic industries, various research on dissimilar welding techniques of aluminum and steel is being carried out. Since dissimilar materials have different physical and electrochemical characteristics, joining through conventional fusion welding is challenging, and there is a high probability of a decrease in strength of the welded joints. To solve this problem, a mechanical fastening method is mainly applied to join dissimilar parts with different material properties, but this process has disadvantages in terms of productivity improvement and cost reduction because additional consumables, such as rivets, are required. In this research, we investigated the optimization of the weld bonding conditions of joints using epoxy-based adhesive bonding and DeltaSpot welding for Al/Fe dissimilar materials. For each experimental condition, the corrosion resistance and tensile shear strength of the welded joints were evaluated according to salt spray test times of 0 h, 640 h, 1280 h, and 1920 h. As a whole, as the salt spray test time increased, the tensile shear strength of the welded joints decreased. It was confirmed that weld bonding, after manual polishing of the aluminum side, resulted in the highest average tensile shear strength of 5.88 kN at 1920 h, which was an increase compared with other conditions.

【 授权许可】

Unknown