Mechanical properties and nugget evolution in resistance spot welding of Zn–Al–Mg galvanized DC51D steel

IF 1.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI:10.1515/htmp-2022-0243

Linlin Zhao, Yuechuan Lu, Ziliu Xiong, Li Sun, J. Qi, X. Yuan, J. Peng

引用次数: 0

Abstract

Abstract Zn–Al–Mg coating galvanized steel in resistance spot welded (RSW) in different configurations of DC51D was investigated to illustrate the nugget evolution process and mechanical properties of the joints. Results show that the microstructure of welded joints can be divided into nugget zone (FZ), heat-affected zone (HAZ), and base metal zone (BM). FZ was composed of lath martensite. The average hardness value of the weld joint was 110 HV0.2 while the FZ was up to 300 HV0.2 due to the formation of lath martensite. The failure modes can be divided into interface fracture (IF) and pull-out fracture occurred (PF) under different welding parameters, in which shear dimples showed had a typical plastic fracture morphology. The best range for welding parameters was found to be 12–18 cycles in which the nugget diameter reached 5.5 mm. The process of nugget evolution in HAZ and FZ was discussed.

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锌-铝-镁镀锌DC51D钢电阻点焊的力学性能和熔核演变

摘要:研究了不同形态DC51D电阻点焊(RSW)中Zn-Al-Mg涂层镀锌钢接头的熔核演化过程和力学性能。结果表明:焊接接头组织可分为熔核区(FZ)、热影响区(HAZ)和母材区(BM)。FZ由板条马氏体组成。由于板条马氏体的形成，焊缝平均硬度为110 HV0.2, FZ最高可达300 HV0.2。不同焊接参数下的破坏模式可分为界面断裂(IF)和拉出断裂(PF)，其中剪切韧窝表现为典型的塑性断裂形态。焊接参数的最佳范围为12 ~ 18次循环，其中熔核直径达到5.5 mm。讨论了热区和飞区熔核的演化过程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Temperature Materials and Processes 工程技术-材料科学：综合

CiteScore

2.50

自引率

0.00%

发文量

审稿时长

3.9 months

期刊介绍： High Temperature Materials and Processes offers an international publication forum for new ideas, insights and results related to high-temperature materials and processes in science and technology. The journal publishes original research papers and short communications addressing topics at the forefront of high-temperature materials research including processing of various materials at high temperatures. Occasionally, reviews of a specific topic are included. The journal also publishes special issues featuring ongoing research programs as well as symposia of high-temperature materials and processes, and other related research activities. Emphasis is placed on the multi-disciplinary nature of high-temperature materials and processes for various materials in a variety of states. Such a nature of the journal will help readers who wish to become acquainted with related subjects by obtaining information of various aspects of high-temperature materials research. The increasing spread of information on these subjects will also help to shed light on relevant topics of high-temperature materials and processes outside of readers’ own core specialties.