Multi-scale simulation of solidification behavior and microstructure evolution during vacuum electron beam welding of Al-Cu alloy

2021 ◽  
Vol 172 ◽  
pp. 121156
Author(s):  
Ziyou Yang ◽  
Kangning Jin ◽  
Hui Fang ◽  
Jingshan He
Keyword(s):  
Electron Beam ◽  
Microstructure Evolution ◽  
Electron Beam Welding ◽  
Solidification Behavior ◽  
Multi Scale ◽  
Cu Alloy

Effects of Precipitated Particles on Microstructure Evolution during Thermo-Mechanical Processing of Al-Zn-Mg-Cu Alloy

2016 ◽  
Vol 879 ◽  
pp. 318-323
Author(s):  
Hui Qin Chen ◽  
Kun Zhang ◽  
Xiao Dong Zhao
Keyword(s):  
Solid Solution ◽  
Microstructure Evolution ◽  
Hot Deformation ◽  
Mechanical Treatment ◽  
Solution Treatment ◽  
Mechanical Processing ◽  
Final Solution ◽  
Multi Scale ◽  
Cu Alloy ◽  
Solid Solution Treatment

Two intermediate thermal mechanical treatment (ITMT) Processes were designed for investigation the influence of multi-scale precipitated particles on microstructure evolution during thermo-mechanical processing of Al-7.6Zn-1.5Mg-1.75Cu-0.12Zr alloy by hot compressive experiments and microstructure testing of OM and EBSD. It is found that the size and distribution of precipitated particles preprocessed by over-aging at 400°C for14h can meet the particle stimulated nucleation of recrystallization. Refined and uniform grains present in the sample after hot deformation at about 20 of LnZ up to 80% reduction and subsequent final solid solution treatment. But for samples preprocessed by solid solution at 435°C for 2h and aging at 200°C for 12h, Refined uniform recrystallized grains or recovery sub-grains in elongated grains present in the samples after hot deformation at about 25 of LnZ up to 60% reduction followed by annealing at 350°C for 0.5h and final solution treatment.

Effect of Electron Beam Welding on Microstructure and Mechanical Properties of Spray-Deposited Al-Zn-Mg-Cu Alloy

2013 ◽  
Vol 302 ◽  
pp. 230-235
Author(s):  
Feng Wang ◽  
Yu Ting Zuo ◽  
Bai Qing Xiong ◽  
Yon Gan Zhang ◽  
Hong Wei Liu ◽  
...  
Keyword(s):  
Electron Beam ◽  
Fusion Zone ◽  
Base Metal ◽  
Heat Affected Zone ◽  
Electron Beam Welding ◽  
Spray Atomization ◽  
Test Results ◽  
Cu Alloy ◽  
Equiaxed Grains ◽  
Strengthening Phases

In this study, Al-8.6Zn-2.6Mg-2.2Cu (wt,%) alloy was synthesized by the spray atomization and deposition technique. Electron beam welding (EBW) joint in the spray-deposited Al-8.6Zn-2.6Mg-2.2Cu alloy is composed of fusion zone, heat affected zone and base metal region. The microstructure of the fusion zone has been found to be very fine equiaxed grains, and the microstructure of the heat affected zone is mainly composed of α-Al and Al/MgZn2 eutectic microstructure. Extensive microhardness measurements were conducted in the weld regions of the nuggets exhibited a hardness loss in the fusion zone due to the loss of strengthening phases. Tensile properties test results indicated that tensile strength of these welds approached 82.3~85.3% of the base metal. The analysis of fracture surface has confirmed that the specimen fractured within the weld region during tensile test.

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