Mechanical Behavior of Gas Tungsten Arc Surface Modified Composite Layer on Mg Alloy AZ31 with SiCp and Aluminum

2007 ◽  
Vol 546-549 ◽  
pp. 485-490
Author(s):  
Hai Yan Jiang ◽  
Wen Bin Ding ◽  
Xiao Qin Zeng ◽  
De Hui Li ◽  
Shou Shan Yao
Keyword(s):  
Wear Resistance ◽  
Magnesium Alloy ◽  
Grain Refinement ◽  
Composite Layer ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Gas Tungsten Arc ◽  
Sic Particles ◽  
Gas Tungsten ◽  
Surface Modified

Gas tungsten arc (GTA) surface modification process was used to deposit SiC particles and aluminum alloy powders on the surface of magnesium alloy AZ31. This method is an effective technique in producing a high performance composite layer. This process result notable grain refinement in the GTA surface modified composite layer. The hardness and wear resistance of the GTA surface modified composite layer are superior to that of as-received magnesium alloy AZ31. The hardness values and wear resistance of GTA surface modified composite layer depend on the GTA process parameters and the SiC particles powder concentration and distribution. The optimum processing parameters for the formation of a homogeneous crack/defect-free and grain refinement microstructure were established.

The properties of gas tungsten arc deposited SiCP and Al surface coating on magnesium alloy AZ31

2007 ◽  
Vol 61 (2) ◽  
pp. 496-501 ◽  
Author(s):  
Wenbin Ding ◽  
Haiyan Jiang ◽  
Xiaoqin Zeng ◽  
Dehui Li ◽  
Shoushan Yao
Keyword(s):  
Magnesium Alloy ◽  
Surface Coating ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

Grain Refinement of Magnesium Alloy AZ31 under Torsion Extrusion with a Square-Hole Die

2010 ◽  
Vol 654-656 ◽  
pp. 711-714 ◽  
Author(s):  
Susumu Mizunuma ◽  
Takamichi Iizuka ◽  
Kazuhiro Mitsui ◽  
Hidehito Okumura ◽  
Masahide Kohzu
Keyword(s):  
Magnesium Alloy ◽  
Grain Refinement ◽  
Cross Section ◽  
Crystal Orientation ◽  
Electron Backscatter Diffraction ◽  
Entire Cross Section ◽  
Extrusion Axis ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Square Hole

Grain refinement and crystal orientation of magnesium alloy AZ31 under torsion extrusion with a square-hole die are investigated. The optimum temperature and ratio of the die rotation speed to the extrusion speed were clarified, resulting in uniformly distributed fine grains with sizes in the range 1- m over the entire cross section of the worked specimen. The crystal orientation of the specimen was determined by electron backscatter diffraction and compared with that of a conventionally extruded specimen. In the case of torsion extrusion, a very strong <0001> texture was observed along the extrusion axis, especially in the center region of the cross section. In contrast, the <0001> direction of many grains in the conventionally extruded specimen tended to be perpendicular to the extrusion axis.

Effect of Initial Grain Size on Deformation Behavior and Dynamic Recrystallization of Magnesium Alloy AZ31

2005 ◽  
Vol 488-489 ◽  
pp. 223-226 ◽  
Author(s):  
Xu Yue Yang ◽  
Masayoshi Sanada ◽  
Hiromi Miura ◽  
Taku Sakai
Keyword(s):  
Magnesium Alloy ◽  
Dynamic Recrystallization ◽  
Grain Refinement ◽  
Hot Deformation ◽  
Structural Changes ◽  
Kink Bands ◽  
Alloy Az31 ◽  
Continuous Dynamic Recrystallization ◽  
Magnesium Alloy Az31 ◽  
Continuous Dynamic

Hot deformation and associated structural changes were studied in compression of a magnesium alloy AZ31 with initial grain sizes (D0) of 22 µm and 90 µm at a temperature of 573K. D0 influences significantly the flow curve and the kinetics of grain refinement during hot deformation. For D0 = 22 µm, grain fragmentation takes place due to frequent formation of kink bands initially at corrugated grain boundaries and then in grain interiors in low strain, followed by full development of new fine grains in high strain. For D0 = 90 µm, in contrast, twinning takes place in coarser original grains, and then kink bands and new fine grains are formed mainly in finer ones at low strains. Then new grains are formed in necklace along the boundaries of coarse original grains, followed by their development into the grain interiors. Grain refinement in the Mg alloy can be concluded to result from a series of deformation-induced continuous reactions, they are essentially similar to continuous dynamic recrystallization (cDRX).

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