Effect of Nugget Size on Tensile and Fatigue Strength of Spot Welded AZ31 Magnesium Alloy Univ. of Waterloo

Format:

Conference/Event

Author/Creator:

Behravesh, Behravesh, author.

Contributor:

Glinka, Grzegorz

Jahed, Hamid

Lambert, Stephen

Liu, Lei

Zhou, Y.

Conference Name:

SAE 2010 World Congress & Exhibition (2010-04-13 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2010

Summary:

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

Notes:

Vendor supplied data

Publisher Number:

2010-01-0411

Access Restriction:

Restricted for use by site license