Multiaxial fatigue behaviour of A356-T6
Version of Record online: 27 JUN 2012
© 2012 Wiley Publishing Ltd.
Fatigue & Fracture of Engineering Materials & Structures
Volume 35, Issue 12, pages 1148–1159, December 2012
How to Cite
ROY, M., NADOT, Y., MAIJER, D. M. and BENOIT, G. (2012), Multiaxial fatigue behaviour of A356-T6. Fatigue & Fracture of Engineering Materials & Structures, 35: 1148–1159. doi: 10.1111/j.1460-2695.2012.01702.x
- Issue online: 20 NOV 2012
- Version of Record online: 27 JUN 2012
- Received in final form 1 May 2012
- casting defects;
- high cycle fatigue;
- multiaxial fatigue
Aluminum alloy A356-T6 was subjected to fully reversed cyclic loading under tension, torsion and combined loading. Results indicate that endurance limits are governed by maximum principal stress. Fractography demonstrates long shear mode III propagation with multiple initiation sites under torsion. Under other loadings, fracture surfaces show unique initiation sites coincidental to defects and mode I crack propagation. Using the replica technique, it has been shown that the initiation life is negligible for fatigue lives close to 106 cycles for combined loading. The natural crack growth rate has also been shown to be comparable to long cracks in similar materials.