期刊
SCRIPTA MATERIALIA
卷 152, 期 -, 页码 141-145出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2018.04.026
关键词
Shape memory alloys; Martensitic phase transformation; Plastic deformation; Micropillars
类别
资金
- National Youth Science Foundation [51501113]
- National Natural Science Foundation of China [51501087, 11532010]
- Fundamental Research Program of Shenzhen [JCYJ20170307110418960, JCYJ20170412153039309]
- National Key RAMP
- D Program of China [2017YFB0406000]
- Japan Society for the Promotion of Science [26289230]
The size effect on the mechanical behaviors of single crystalline Fe-31.2Pd (at.%) micropillars with four different pillar diameters (approximately 2 mu m,1 mu m, 500 nm and 400 nm) were studied by compressing in the [001] direction. Both the Young's modulus and yield stress increase with the decrease of pillar diameter. The main defects in the plastically deformed pillars are the {111} deformation twins, which could be covered by high density of dislocations after further plastic deformation in a 400 nm pillar. A repeatable elastic-like strain similar to 4% was observed for more than 40,000 cycles. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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