Improvement of the Laser-Welded Lap Joint of Dissimilar Mg Alloy and Cu by Incorporation of a Zn Interlayer

During pulsed laser welding of AZ 31B magnesium (Mg) alloy and T2 pure copper (Cu), Cu2Mg and Mg2Cu are generated, but the bonding ability of the two compounds is usually weak, resulting in low strength. In order to improve the joint of two dissimilar metals, a zinc interlayer was inserted between the Mg alloy and Cu, and the effects of the thickness of the Zn interlayer on the microstructure and properties of the joint were studied. The fused zone consisted of Cu2Mg and MgZn, and, according to first-principles calculation, in the same energy range, the area enclosed by the density of the state curve of MgZn was larger than that of Cu2Mg. Hence, the bonding ability of MgZn was better than that of Cu2Mg, and MgZn improved the strength of the welded joint. The most advantageous thickness of the Zn interlayer was 0.1 mm, and the shear strength was 48.15 MPa that was 161% higher than that of the directly welded Mg/Cu joint.

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Effect of Welded Joints Design on the Joint Strength During Statie and Dynamie Loading with Different Current and Type of Wire Welding

Baghdad Science Journal ◽

10.21123/bsj.1.1.80-86 ◽

2004 ◽

Vol 1 (1) ◽

pp. 80-86

Author(s):

Baghdad Science Journal

Keyword(s):

Dynamic Loading ◽

Welded Joint ◽

Welding Current ◽

Fatigue Loading ◽

Butt Joint ◽

Lap Joint ◽

Joint Properties ◽

Tension Loading ◽

Static And Dynamic Loading ◽

Better Than

The aim of this research is to study the effect of welded joint design (Butt joint and lap joint) on thejoint strength during tension and fatigue loading with different current of welding (40,50,60,70,80) ^per, and different type of wire welding. The result of this research is showed that the effect of fatigue loading on the type of joint is more than the effect of tension loading on it. And the butt joint welding is better than the lap joint welding during the fatigue loaded.The experimental results of the effect of W'elding current showed that more increasing and more decreasing the value of the heat input, during the welding was found to produce mechanical brittleness on the buttjoint welding during the static and dynamic loading. Also it was found that welded lap joint properties are improved when the welding current is increase during the static and dynamic loading. Results indicate too that the more effect of the type of wires welding on the welded joint during the static and dynamic loading.?

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Structural stabilities and thermal properties of η′-Mg2Zn5-Al2+ and η-MgZn2 phase in Al–Zn–Mg alloy: first-principles calculation and quasi-harmonic Debye approximation

Journal of Materials Research and Technology ◽

10.1016/j.jmrt.2020.12.072 ◽

2021 ◽

Vol 10 ◽

pp. 840-852

Author(s):

Shao Hongbang ◽

Huang Yuanchun ◽

Liu Yu ◽

Ren Xianwei ◽

Xiao Zhengbing

Keyword(s):

Thermal Properties ◽

First Principles ◽

First Principles Calculation ◽

Mg Alloy ◽

Debye Approximation ◽

Mgzn2 Phase

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First-Principles Calculation of Al-Cu-Mg Alloy Strengthening Phase

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1096.109 ◽

2015 ◽

Vol 1096 ◽

pp. 109-113

Author(s):

He Ma ◽

Li Jia Chen ◽

Lian Quan Guo ◽

Li Leng ◽

Lin Lin

Keyword(s):

First Principles ◽

Density Functional ◽

Heat Of Formation ◽

First Principles Calculation ◽

Mg Alloy ◽

First Principles Calculations ◽

Strengthening Phase ◽

Functional Theory ◽

Calculation Results ◽

Mg Content

In this study, equilibrium lattice parameters, heat of formation and cohesive energy of four kinds of typical phases with different structure intermetallic compound in Al-Cu-Mg alloy were investigated by first-principles calculations based on density functional theory via CASTEP software. The calculation results are analyzed and show that ternary strengthening phase Al2CuMg generated first when Mg content is higher, while binary strengthening phase Al2Cu or Al3Cu2 first generated and more stable when Mg content is low in Al-Cu-Mg alloy which indicates that element Cu and Al alloying capacity significantly higher than that of Mg and Al element.

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