| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1633992 | Procedia Materials Science | 2016 | 6 Pages |
Abstract
The characteristics of cyclic bending deformation and fatigue fracture are studied on polycrystalline aluminum and Al-1.0mass%Mg alloy from the metallurgical point of view. It is found that the fatigue life mainly depends on grain size and the kind of materials. Cracks are preferentially formed at grain boundaries inclined 40 – 60°to the tension-compression direction, suggesting that shear stress affects the crack formation. EBSD measurements reveal the inhomogeneity of deformation. Intense development of sub-grain is seen in the grain interior close to a crack. It indicates that the work hardening close to grain boundaries triggers the crack formation.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Hayato Ikeya, Hiroshi Fukutomi,