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Microstructure and mechanical properties of Mg-to-Al dissimilar welded joints with an Ag interlayer using ultrasonic spot welding
Microstructure and mechanical properties of Mg-to-Al dissimilar welded joints with an Ag interlayer using ultrasonic spot welding
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摘要：
Lightweight ZEK100-0 Mg alloy and A16022-T43 Al alloy with an Ag interlayer were joined via ultrasonic spot welding(USW),focusing on the microstructural change and tensile lap shear strength of the welded joints in relation to welding energy.Mg/Al interface was superseded by Mg/Ag and Al/Ag interfaces,and unfavorable Mg门A-intermetallic compound was eliminated.Ag foil was observed to be intact in the nugget center,while it was broken or dissolved at the nugget edge at high welding energy levels.The diffusion layer at the Mg/Ag interface consisted of two distinctive sub-layers:Mg3Ag intermetallic compound adjoining Ag foil,and Mg3Ag-l-Mg eutectic structure adjacent to Mg.Only a thin diffusion layer consisting mainly of Ag3Al occurred al lhe Al/Ag interface.The tensile lap shear strength first increased,reached its peak value,and then decreased with increasing welding energy.The shear strength achieved in the present study was〜31%higher than that of the joint without interlayer.Interfacial failure occurred at all energy levels,with Ag foil particles or fragments being stuck on both Mg and Al sides due to its intense interaction with Mg and Al via accelerated diffusion during USW.The results obtained pave the way for the challenging dissimilar welding between Mg and Al alloys.
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| 篇名 | Microstructure and mechanical properties of Mg-to-Al dissimilar welded joints with an Ag interlayer using ultrasonic spot welding | ||
| 来源期刊 | 镁合金学报(英文) | 学科 | 工学 |
| 关键词 | Magnesium alloy Aluminum alloy Ultrasonic spot welding Ag interlayer Microstructure Tensile lap shear strength | ||
| 年，卷（期） | 2020,（2） | 所属期刊栏目 | |
| 研究方向 | 页码范围 | 552-563 | |
| 页数 | 12页 | 分类号 | TG1 |
| 字数 | 语种 | ||
| DOI | |||
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节点文献
Magnesium
alloy
Aluminum
alloy
Ultrasonic
spot
welding
Ag
interlayer
Microstructure
Tensile
lap
shear
strength
研究起点
研究来源
研究分支
研究去脉
引文网络交叉学科
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期刊影响力
镁合金学报（英文）
主办单位：
China
Association
for
Science
and
Technology
Chinese
Committee
for
Magnesium
and
its
Applications
出版周期：
季刊
ISSN：
2213-9567
CN：
50-1220/TF
开本：
出版地：
174 Shazheng Str., C
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出版文献量（篇）
153
总下载数（次）
1
总被引数（次）
0
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