Microstructure and mixed mode I/II fracture of AA2524-T351 base material and friction stir welds

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Engineering Fracture Mechanics, ISSN: 0013-7944, Vol: 73, Issue: 4, Page: 391-407

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Sutton, Michael A.; Reynolds, Anthony P.; Yan, Junhui; Yan, Bangcheng; Yuan, Ning
Elsevier BV
Materials Science; Engineering; aluminum AA2524-T351 microstructure; mixed mode I/II stable tearing; crack opening displacement; Applied Mechanics; Materials Science and Engineering; Mechanical Engineering; Metallurgy; Structural Materials
article description
Mixed mode I/II experiments for base material AA2524 indicate that (a) transition from a local opening mode of fracture to a local shear mode of fracture occurs in AA2524 at much lower levels of far-field shear loading than observed in AA2024, showing the increased potential for mode transition in the cleaner aluminum alloy AA2524 and (b) the measured critical crack opening displacement (∣COD crit ∣) in AA2524 is isotropic and equal to the maximum measured value (LT orientation) in AA2024.