Liquid Penetration Induced Cracking in Mg-Alloy Spot Welds

2008 ◽  
Vol 580-582 ◽  
pp. 409-412 ◽  
Author(s):  
M. Yamamoto ◽  
A. Gerlich ◽  
T.H. North ◽  
K. Shinozaki
Keyword(s):  
Spot Welding ◽  
Friction Stir Spot Welding ◽  
Stir Zone ◽  
Mg Alloy ◽  
Liquid Penetration ◽  
Key Factors ◽  
Spot Welds ◽  
Friction Stir ◽  
Temperature Cycles

Liquid Penetration Induced (LPI) cracking during AZ91, AZ31 and AM60 friction stir spot welding is investigated. The temperature cycles, within the stir zone and in the TMAZ region, are examined. The mechanism and the key factors determining LPI cracking in Mg-alloy friction stir spot welds are delineated.

Cracking and Local Melting in Mg-Alloy and Al-Alloy During Friction Stir Spot Welding

2008 ◽  
Vol 52 (9-10) ◽  
pp. 38-46 ◽  
Author(s):  
M. Yamamoto ◽  
A. Gerlich ◽  
T. H. North ◽  
K. Shinozaki
Keyword(s):  
Spot Welding ◽  
Friction Stir Spot Welding ◽  
Mg Alloy ◽  
Al Alloy ◽  
Local Melting ◽  
Friction Stir

Microstructural analysis of the stir zone of Al alloy produced by friction stir spot welding

2009 ◽  
Vol 23 (6) ◽  
pp. 403-410 ◽  
Author(s):  
Mitsuo Fujimoto ◽  
Shinji Koga ◽  
Natsumi Abe ◽  
Yutaka S. Sato ◽  
Hiroyuki Kokawa
Keyword(s):  
Spot Welding ◽  
Microstructural Analysis ◽  
Friction Stir Spot Welding ◽  
Stir Zone ◽  
Al Alloy ◽  
Friction Stir

scholarly journals Improved mechanical properties of cast Mg alloy welds via texture weakening by differential rotation refill friction stir spot welding

2021 ◽  
Vol 203 ◽  
pp. 114113
Author(s):  
Banglong Fu ◽  
Junjun Shen ◽  
Uceu F.H.R. Suhuddin ◽  
Ting Chen ◽  
Jorge F. dos Santos ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Differential Rotation ◽  
Spot Welding ◽  
Friction Stir Spot Welding ◽  
Mg Alloy ◽  
Friction Stir

scholarly journals Dislocation Density-Based Modeling of Dynamic Recrystallized Microstructure and Process in Friction Stir Spot Welding of AA6082

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 672
Author(s):  
Zeng Gao ◽  
Jianguang Feng ◽  
Zhenjiang Wang ◽  
Jitai Niu ◽  
Christof Sommitsch
Keyword(s):  
Grain Size ◽  
Dislocation Density ◽  
Dynamic Recrystallization ◽  
Spot Welding ◽  
Microstructural Analysis ◽  
Friction Stir Spot Welding ◽  
Stir Zone ◽  
Friction Stir ◽  
Fine Grained ◽  
Dynamic Recrystallization Behavior

This work mainly focuses on a series of microstructural analysis and predictions regarding dynamic recrystallization behavior, change in grain size, and dislocation density. Additionally, this study includes the shape prediction of the stir zone formed during friction stir spot welding. Microstructure analysis of the joint reveals that the mechanism of dynamic recrystallization in the stir zone is geometric dynamic recrystallization. A set of constitutive equations based on dislocation density is established and implemented in DEFORM-3D software to predict dynamic recrystallization during friction stir spot welding of AA6082. From the experimental and model predictions, it is observed that the original microstructure in the stir zone is completely replaced by a recrystallized fine grained microstructure. There is satisfactory agreement between the experimental grain size and the simulated results. In addition, the predicted shape of the stir zone fits quite well with the experimental shape as well.

scholarly journals Microstructural Analysis of the Stir Zone of Al Alloy Produced by Friction Stir Spot Welding

2007 ◽  
Vol 25 (4) ◽  
pp. 553-559 ◽  
Author(s):  
Mitsuo FUJIMOTO ◽  
Shinji KOGA ◽  
Natsumi ABE ◽  
Yutaka SATO S. ◽  
Hiroyuki KOKAWA
Keyword(s):  
Spot Welding ◽  
Microstructural Analysis ◽  
Friction Stir Spot Welding ◽  
Stir Zone ◽  
Al Alloy ◽  
Friction Stir
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