A new smoothed particle hydrodynamics non-Newtonian model for friction stir welding: Process modeling and simulation of microstructure evolution in a magnesium alloy

2013 ◽  
Vol 48 ◽  
pp. 189-204 ◽  
Author(s):  
Wenxiao Pan ◽  
Dongsheng Li ◽  
Alexandre M. Tartakovsky ◽  
Said Ahzi ◽  
Marwan Khraisheh ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Magnesium Alloy ◽  
Modeling And Simulation ◽  
Microstructure Evolution ◽  
Process Modeling ◽  
Smoothed Particle Hydrodynamics ◽  
Welding Process ◽  
Friction Stir ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

Microstructure evolution during friction-stir welding of AZ31 magnesium alloy

2015 ◽  
Vol 100 ◽  
pp. 301-312 ◽  
Author(s):  
S. Mironov ◽  
T. Onuma ◽  
Y.S. Sato ◽  
H. Kokawa
Keyword(s):  
Friction Stir Welding ◽  
Magnesium Alloy ◽  
Microstructure Evolution ◽  
Az31 Magnesium Alloy ◽  
Friction Stir

scholarly journals Correlating Tensile Strength & Peak Temperatures for Magnesium Alloy AZ91 during Friction Stir Welding Using Varied Tool Geometries & FEA Tool

10.29007/6xnv ◽  
2018 ◽  
Author(s):  
Kamlesh Dhansukhlal Bhatt ◽  
Nikul Patel ◽  
Vishal Mehta
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Magnesium Alloy ◽  
Rotation Speed ◽  
Welding Process ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Alloy Az91 ◽  
Magnesium Alloy Az91 ◽  
Tool Rotation

Magnesium & its alloys are flammable for conventional fusion welding process. This adverse effect can be eliminated by a non-fusion solid state welding process, established by The Welding Institute (TWI) in 1991, called friction stir welding (FSW). This is applied in this investigation for joining two plates together by using non-consumable tools (three pin profiles) between two abutting plates of magnesium alloy AZ91 having 6 mm thickness. FSW process joins the plates with certain advantages such as low distortion, no shielding gas required, fine recrystallized microstructure, no fumes liberated during the process, etc. In Friction stir welding, process parameters such as welding speed, tool rotation speed, tool dimensions and axial force play an important role during the process. In the present work, the 6 mm thick plates of the said alloy are welded at traverse speed of 28 mm/min to 56 mm/min with tool rotation speed ranging from 710 rpm to 1400 rpm. Tensile strength testing & simulation of peak temperatures has been carried out for establishing correlationship between best parameters from the selected ones with temperature profiles obtained by those parameters for giving optimum structure-property relationship using different pin profiles.

Friction Stir and Gas Tungsten Arc Welding of ZM21 Magnesium Alloy

2014 ◽  
Vol 909 ◽  
pp. 77-82
Author(s):  
Hari Krishna Kallipudi ◽  
Rama Koteswara Rao Sajja ◽  
Venkata Subba Rao Veera
Keyword(s):  
Friction Stir Welding ◽  
Magnesium Alloy ◽  
Arc Welding ◽  
Welding Process ◽  
Gas Tungsten Arc Welding ◽  
Friction Stir ◽  
Friction Stir Welding Process ◽  
Gas Tungsten Arc ◽  
Gas Tungsten ◽  
Welding Processes

Magnesium alloy ZM21 plates were welded using friction stir welding, a solid state process and gas tungsten arc welding which is a fusion welding process. Defect free, full penetration welds were obtained after several trials using different process parameters. The effect of welding processes on mechanical properties of Mg-Zn-Mn joints were evaluated using tensile tests, bend test, vickers micro hardness measurements and optical microscopy. Welds produced by Friction stir welding process exhibited superior tensile properties compared to Gas Tungsten Arc Welding process. Hardness reduction in the weld metals were observed for both the welding techniques. Friction stir welds showed finer grains in the weld nugget and in the heat affected zone. Both types of welds exhibited good bend ductility comparable to that of the base material. It has been concluded that both the processes are well suited to obtain sound welds of the magnesium alloy ZM21 and Friction stir welding process offers stronger welds.

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