Effect of Nugget Size on Tensile and Fatigue Strength of Spot Welded AZ31 Magnesium Alloy 2010-01-0411
Interest in magnesium, as the lightest engineering metal, has increased in the automotive industry as a result of requirements for lighter and cleaner vehicles. Resistance spot welding (RSW) is already the predominant mode of fabrication in this industry, and the fatigue of spot welded magnesium sheet must be studied.
In this study, the tensile and fatigue strength of resistance spot welded AZ31 Mg alloy was studied. Three sets of tensile shear spot welded specimens were prepared with different welding parameters to achieve different nugget sizes. Metallographic examination revealed grain size changes from the base material (BM) to heat affected zone (HAZ) to the fusion zone (FZ). Monotonic tensile and fatigue tests were conducted and the effect of nugget size on tensile shear and fatigue strength was discussed. Modes of failure in each set of specimens under tensile and cyclic loading were examined and compared with those in steel and aluminum spot welds which are the most common materials in the automotive industry. Microstructural features of the fracture surface were studied.
Citation: Behravesh, B., Liu, L., Jahed, H., Lambert, S. et al., "Effect of Nugget Size on Tensile and Fatigue Strength of Spot Welded AZ31 Magnesium Alloy," SAE Technical Paper 2010-01-0411, 2010, https://doi.org/10.4271/2010-01-0411. Download Citation
Author(s):
Behzad Behravesh, Lei Liu, Hamid Jahed, Stephen Lambert, Grzegorz Glinka, Norman Zhou
Affiliated:
Univ. of Waterloo, Univ of Waterloo
Pages: 9
Event:
SAE 2010 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Advances In Light Weight Materials – Aluminum, Casting Materials, and Magnesium Technologies, 2010-SP-2294
Related Topics:
Tensile strength
Magnesium alloys
Welding
Fatigue
Fabrication
Magnesium
Aluminum
Metals
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