Journal
ACTA MATERIALIA
Volume 130, Issue -, Pages 196-207Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2017.03.042
Keywords
Concentration modulation; Martensitic transformation; Hysteresis; Pseudo-elasticity; Computer simulation
Funding
- XJTU
- HKUST
- Hong Kong Research Grants Council [622911]
- US Natural Science Foundation [DMR-1410322]
- U.S. Department of Energy Grant [DE-SC0001258]
- Science and Technology Commission of Shanghai Municipality [15DZ2260300, 16DZ2260600]
- National Key Research and Development Program of China [2016YFB0701302, 2014CB644003]
- National Natural Science Foundation of China [51671156, IRT13034]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1410322] Funding Source: National Science Foundation
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Martensitic transformation (MT) is typically a strongly first-order transition with autocatalysis in nucleation followed by rapid growth. It usually takes place within a narrow temperature or stress range, making its utilization in a controllable manner difficult. We show by computer simulations how MTs can be tailored by concentration modulation at the nanoscale in the parent phase, which induces spatial variations of both the stability of martensite and the transformation strain and tunes the overall MT kinetics from a typical first-order transition into a high-order like continuous transition. Such a unique MT characteristic reduces or even eliminates the transformation hysteresis and produces quasi-linear elasticity with ultra-low apparent elastic modulus. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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