Room temperature mechanical behaviour of a Ni-Fe multilayered material with modulated grain size distribution |
| |
Authors: | Lilia Kurmanaeva Hamed Bahmanpour Troy Holland Jonathan McCrea Joon Hwan Lee Jie Jian |
| |
Affiliation: | 1. Department of Chemical Engineering and Materials Science, University of California, Davis, CA 95817, USAlkurmanaeva@ucdavis.edu;3. Department of Chemical Engineering and Materials Science, University of California, Davis, CA 95817, USA;4. Department of Mechanical Engineering, Colorado State University, Campus Delivery 1374, Fort Collins, CO 80523, USA;5. Integran Technologies Inc., Toronto, Canada;6. Department of Electrical and Computer Engineering, Texas A &7. M University, College Station, TX 77843-3128, USA |
| |
Abstract: | To gain fundamental insight into the relationship between length scales and mechanical behaviour, Ni-Fe multilayered materials with a 5-μm-layer thickness and a modulated grain size distribution have been synthesized by pulsed electrodeposition. Microstructural studies by SEM and TEM reveal the alternating growth of well-defined layers with either nano (d = 16 nm) or coarse grains (d ≥ 500 nm). Room temperature tensile tests have been performed to investigate the mechanical response and understand the underlying deformation mechanisms. Tensile test results and fractographic studies demonstrate that the overall room temperature mechanical behaviour of the multilayered material, i.e. strength and ductility, is governed primarily by the layers containing nanocrystalline grains. The measured properties have been discussed in the context of modulated grain structure of the multilayered sample and contribution of each grain size regime to the overall strength and ductility. |
| |
Keywords: | Ni-Fe electrodeposition multilayered structure tensile test |
|
|