Microstructures and mechanical properties of metal inert-gas arc welded joints of aluminum alloy and ultrahigh strength steel using Al–Mg and Al–Cu fillers

2017 ◽  
Vol 32 (3) ◽  
pp. 666-676 ◽  
Author(s):  
Qing Chang ◽  
Daqian Sun ◽  
Xiaoyan Gu ◽  
Hongmei Li
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Welded Joints ◽  
Inert Gas ◽  
Ultrahigh Strength ◽  
Ultrahigh Strength Steel ◽  
Microstructures And Mechanical Properties ◽  
Image Position

Abstract

Microstructures and Mechanical Properties of 7050 Ultrahigh-Strength Aluminum Alloy Joints by Laser Welding

2018 ◽  
Vol 55 (3) ◽  
pp. 031403
Author(s):  
谢超杰 Xie Chaojie ◽  
杨尚磊 Yang Shanglei ◽  
刘浩博 Liu Haobo ◽  
曹亚明 Cao Yaming ◽  
张琪 Zhang Qi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Laser Welding ◽  
Ultrahigh Strength ◽  
Microstructures And Mechanical Properties

Interface characteristics and formation mechanism of plasma arc welding-brazing aluminum alloy/ultrahigh-strength steel joint

2021 ◽  
Vol 118 (4) ◽  
pp. 405
Author(s):  
Di Wu ◽  
Wenhua Geng ◽  
Hongmei Li ◽  
Lei Wang ◽  
Ke Yu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Formation Mechanism ◽  
Arc Welding ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Interface Zone ◽  
Ultrahigh Strength ◽  
Ultrahigh Strength Steel ◽  
Interface Characteristics

A butt welding-brazing joint of 5A06 aluminum alloy and DP1180 ultrahigh-strength steel was carried out by using plasma arc welding (PAW) with Al-Si welding wire. Interface characteristics, formation mechanism and mechanical properties of the joint were investigated. The results showed that the dissimilar joint contained bond zone, weld zone and Al/steel interface zone. During PAW, the inter-diffusion of Fe and Al and the interfacial reaction occurred, and the double-layer structure intemtallics (IMCs) composed of Fe4Al13 layer and Fe2Al5 layer were produced in the interface zone. The thickness and morphology of both IMC layers depended on different positions in the interface zone. The Fe2Al5 layer thickness decreased obviously and its morphology changed from continuous layer to discontinuous layer with the decrease of welding heat input. The average tensile strength of the joint was 88 MPa and the joint fractured at the Al/steel interface zone with the highest hardness (524 HV). The interface zone IMCs were the main factor of affecting the mechanical properties of aluminum alloy and ultrahigh-strength steel PAW joint.

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