Influence of zirconium and scandium on crack susceptibility during welding of Al–Ca–Zn–Mg alloys and mechanical properties of their welded joints

IF 0.8 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Metallurgist Pub Date : 2024-12-20 DOI:10.1007/s11015-024-01842-y

Viktor V. Ovchinnikov, Torgom K. Akopyan, Yakov M. Klochkov, Evgeny O. Protsenko

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Abstract

The susceptibility of experimental alloys to cracking during fusion welding was evaluated by fishbone testing and the method developed at the Bauman Moscow State Technical University (BMSTU). In terms of weldability, the experimental Al–2Ca–2.5 Mg–0.4Mn (alloy 2B) and Al–1Ca–5.5 Mg–0.5Mn (alloy 1B) alloys are comparable to commercial AMg3 and 1915 aluminum alloys, respectively. Alloying of zirconium alloy (alloy 1) led to a decrease in resistance to cracking during welding. Additional alloying of alloy 2B with scandium had a beneficial effect on its susceptibility to crack formation at an arc current of 90 A. For alloy 4, an increase in the arc current of up to 95A was accompanied by a significant increase in the crack susceptibility coefficient of up to 75%, which indicates the need to use filler wire to obtain joints from this alloy during argon arc welding. Joint alloying of the studied alloys with zirconium and scandium contributes to the destruction of axial crystallite in the weld metal (when welding without filler wire) and the overall increase in the resistance of the weld metal to crack formation during welding.

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锆、钪对Al-Ca-Zn-Mg合金焊接裂纹敏感性及焊接接头力学性能的影响

采用鱼骨试验和莫斯科鲍曼国立技术大学（BMSTU）开发的方法，对实验合金在熔焊过程中的开裂敏感性进行了评估。在可焊性方面，实验制备的Al-2Ca-2.5 Mg-0.4Mn（合金2B）和Al-1Ca-5.5 Mg-0.5Mn（合金1B）合金分别与AMg3和1915铝合金相当。锆合金（合金1）的合金化导致焊接时抗开裂性降低。在90 a的电弧电流下，对2B合金进行额外的钪合金化，有利于提高其裂纹形成的敏感性。对于合金4，当电弧电流增加到95A时，裂纹敏感性系数显著增加，达到75%，这表明在氩弧焊时需要使用填充丝来获得该合金的接头。所研究的合金与锆和钪的接合合金化有助于破坏焊缝金属中的轴晶（当焊接时没有填充丝），并且在焊接过程中焊缝金属对裂纹形成的总体阻力增加。

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

Metallurgist 工程技术-冶金工程

CiteScore

1.50

自引率

44.40%

发文量

151

审稿时长

4-8 weeks

期刊介绍： Metallurgist is the leading Russian journal in metallurgy. Publication started in 1956. Basic topics covered include: State of the art and development of enterprises in ferrous and nonferrous metallurgy and mining; Metallurgy of ferrous, nonferrous, rare, and precious metals; Metallurgical equipment; Automation and control; Protection of labor; Protection of the environment; Resources and energy saving; Quality and certification; History of metallurgy; Inventions (patents).