Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5455706 | Materials Science and Engineering: A | 2017 | 8 Pages |
Abstract
A novel experimental approach to study the cyclic plastic deformation of thin metallic films is presented. 300Â nm thick Ni films are deposited on both sides of a pre-tensile soft substrate which allows to deform the films alternately in tension and compression (approximately from +2.7Â GPa down to â2Â GPa) relative to the as-deposited residual stress state. Nanocrystalline thin films' intrinsic elastic strains (or stresses) and true strains have been measured step by step during two loading/unloading cycles thanks to the X-ray diffraction (XRD) and digital image correlation (DIC) techniques respectively. From the first cyclic deformation, a significant Bauschinger effect is evidenced in the films, however, little or no cyclic hardening is observed during the two cyclic tests.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
He Wei, Pierre-Olivier Renault, Eric Le Bourhis, Shibin Wang, Philippe Goudeau,