Journal
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
Volume 17, Issue 5, Pages 357-363Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/136217112X13333824902125
Keywords
Magnesium; Friction stir spot welding; Microstructure; Tensile shear force; Microhardness; Pin diameter; Curved interface; Grain
Funding
- Key Scientific and Technological Project of Chongqing [CSTC, 2009AC4046]
- Natural Science Foundation of CQ CSTC [CSTC, 2010BB4039]
- Fundamental Research Funds for the Central Universities of PR China [CDJZR11135501]
- Fundamental Research Funds for the Central Universities [CDJXS10131155]
- Chongqing University [2011063023, 2010121506]
Ask authors/readers for more resources
The effects of pin diameter on the microstructure and mechanical properties of friction stir spot welded AZ31B magnesium alloy joints were investigated using microstructural observations, tensile tests and microhardness tests. The results showed that with an increase in the pin diameter, the height and width of the curved interface in the friction stir spot welded AZ31B magnesium alloy joints increased because of the strong effect of stirring and high temperature obtained when large sized pins were adopted. An increase in the pin diameter led to the coarsening of alpha-Mg grains in the stir zone, thermomechanical affected zone and heat affected zone because of heat generation, resulting in the decrease in microhardness of stir zone, thermomechanical affected zone and heat affected zone. The tensile shear force of the friction stir spot welded AZ31B magnesium alloy joints increased with the increase in pin diameter because the height and width of the curved interface dominated the failure of the specimens.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available