scholarly journals Research Progress in Plasma arc welding of Magnesium Alloys and Magnesium Matrix Composites

2017 ◽  
Vol 269 ◽  
pp. 012021
Author(s):  
Li Hui ◽  
Zou Yang ◽  
Li Yongbo ◽  
Jiao Lei ◽  
Hou Ruijun
Keyword(s):  
Magnesium Alloys ◽  
Arc Welding ◽  
Research Progress ◽  
Plasma Arc Welding ◽  
Matrix Composites ◽  
Plasma Arc ◽  
Magnesium Matrix ◽  
Magnesium Matrix Composites

Fabrication and Characterization of AZ91/CNT Magnesium Matrix Composites

2009 ◽  
Vol 620-622 ◽  
pp. 271-274 ◽  
Author(s):  
Yong Ha Park ◽  
Yong Ho Park ◽  
Ik Min Park ◽  
Jeong Jung Oak ◽  
Hisamichi Kimura ◽  
...  
Keyword(s):  
Magnesium Alloys ◽  
High Strength ◽  
Matrix Composites ◽  
Wear Properties ◽  
Magnesium Matrix ◽  
Magnesium Matrix Composites ◽  
Squeeze Infiltration ◽  
Infiltration Technique ◽  
Matrix Reinforcement ◽  
Carbon Nano Tube

Carbon Nano Tube (CNT) reinforced AZ91 metal matrix composites (MMC) were fabricated by the squeeze infiltrated method. Properties of magnesium alloys have been improved by impurity reduction, surface treatment and alloy design, and thus the usage for the magnesium alloys has been extended recently. However there still remain barriers for the adaption of magnesium alloys for engineering materials. In this study, we report light-weight, high strength heat resistant magnesium matrix composites. Microstructural study and tensile test were performed for the squeeze infiltrated magnesium matrix composites. The wear properties were characterized and the possibility for the application to automotive power train and engine parts was investigated. It was found that the squeeze infiltration technique is a proper method to fabricate magnesium matrix composites reducing casting defects such as pores and matrix/reinforcement interface separation etc. Improved tensile and mechanical properties were obtained with CNT reinforcing magnesium alloys

scholarly journals Numerical Analysis of Keyhole and Weld Pool Behaviors in Ultrasonic-Assisted Plasma Arc Welding Process

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 703
Author(s):  
Junnan Qiao ◽  
Chuansong Wu ◽  
Yongfeng Li
Keyword(s):  
Shear Stress ◽  
Weld Pool ◽  
Arc Welding ◽  
Acoustic Radiation ◽  
Radiation Force ◽  
Acoustic Radiation Force ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Arc Pressure ◽  
Ultrasonic Assisted

The acoustic radiation force driving the plasma jet and the ultrasound reflection at the plasma arc-weld pool interface are considered to modify the formulas of gas shear stress and plasma arc pressure on the anode surface in ultrasonic-assisted plasma arc welding (U-PAW). A transient model taking into account the dynamic changes of heat flux, gas shear stress, and arc pressure on the keyhole wall is developed. The keyhole and weld pool behaviors are numerically simulated to predict the heat transfer and fluid flow in the weld pool and dynamic keyhole evolution process. The model is experimentally validated. The simulation results show that the acoustic radiation force increases the plasma arc velocity, and then increases both the plasma arc pressure and the gas shear stress on the keyhole wall, so that the keyholing capability is enhanced in U-PAW.

The interfacial characteristic of SiCp/AZ91 magnesium matrix composites fabricated by stir casting

2009 ◽  
Vol 44 (11) ◽  
pp. 2759-2764 ◽  
Author(s):  
X. J. Wang ◽  
X. S. Hu ◽  
K. Wu ◽  
M. Y. Zheng ◽  
L. Zheng ◽  
...  
Keyword(s):  
Stir Casting ◽  
Matrix Composites ◽  
Magnesium Matrix ◽  
Magnesium Matrix Composites ◽  
Az91 Magnesium ◽  
Interfacial Characteristic
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