Deformation behavior of multilayered NiFe with bimodal grain size distribution at room and elevated temperature

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:656

Article

Fiebig, Jochen¹  Jian, Jie²  Kurmanaeva, Lilia¹  McCrea, Jon³  Wang, Haiyan²  Lavernia, Enrique^1,4  Mukherjee, Amiya¹ 

[1] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95817 USA

[2] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA

[3] Integran Technol Inc, Toronto, ON, Canada

[4] Univ Calif Irvine, Dept Chem Engn & Mat Sci, Irvine, CA 92697 USA

关键词: Multilayered material;    Tensile tests;    Elevated temperature;    Deformation mechanism;   

DOI  :  10.1016/j.msea.2015.12.075

来源: Elsevier

【 摘 要 】

We describe a study of the temperature dependent deformation behavior of a multilayered NiFe-60 wt% Fe alloy with a layer thickness of 5 urn fabricated by electrodeposition. The structure of adjacent layers alternates between a nanocrystalline and a coarse grained. Uniaxial tensile tests at temperature between 20 degrees C and 400 degrees C and strain rate of 10(-4)-10(-2) were used to determine the mechanical behavior. Microstructure observations via transmission electron microscopy and fractography were performed to provide insight into the underlying deformation mechanism. The mechanical behavior is discussed in the context of the bimodal microstructure of multilayered samples and the contribution of each sub-layer to strength and ductility. The results reveal that even at higher temperatures the nanocrystalline layer determines the mechanical performance of multilayered materials. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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