Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 59, Issue -, Pages 9-13Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2013.10.004
Keywords
Magnesium alloys; Friction stir welding; Stress fatigue; Texture
Funding
- National R&D Program of China [2011BAE22B05]
- National Natural Science Foundation of China [51371179, 51331008]
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A friction stir welded (FSW) Mg-3Al-1Zn (AZ31) joint, prepared at a welding speed of 100 mm/min and a rotation rate of 800 rpm, was subjected to stress fatigue test. During fatigue deformation, while the specimen thickness shrank around the nugget zone (NZ)/thermomechanically-affected zone (TMAZ) boundary, it varied little in the NZ middle. Besides, the surface appearance differed between the two sides of a fatigued specimen. This non-uniform deformation was attributed to different grain orientation distributions and sheared material layers in various regions, which influenced the fatigue life and fracture behavior of the joint. (C) 2013 Elsevier Ltd. All rights reserved.
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