Journal of Alloys and Compounds2022，Vol.91510.DOI:10.1016/j.jallcom.2022.165401

Re-examination of martensitic stabilization in Cu-based shape memory alloys Part II. Key factors determining occurrence of martensitic stabilization in Cu-based alloys

Peng, Huabei He, Wei Yan, Jiazhen Wang, Shanling Li, Ning Wen, Yuhua Wang, Yongning Jing, Tengfei
Journal of Alloys and Compounds2022，Vol.91510.DOI:10.1016/j.jallcom.2022.165401
✕
  • NSTL
  • Elsevier

Re-examination of martensitic stabilization in Cu-based shape memory alloys Part II. Key factors determining occurrence of martensitic stabilization in Cu-based alloys

Peng, Huabei 1He, Wei 1Yan, Jiazhen 1Wang, Shanling 1Li, Ning 1Wen, Yuhua 1Wang, Yongning 1Jing, Tengfei1
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作者信息

  • 1. Sichuan Univ
  • 折叠

Abstract

Present proposed mechanisms for ageing-induced martensitic stabilization cannot explain why the amount of martensites losing reverse transformation ability (RTA) positively depended on Ms temperatures in directly-quenched CuZnAl alloys owing to dynamic ageing during the cooling process of quenching and subsequent slow heating. We proposed and confirmed that the number of vacancies at martensites boundaries (N-vmb) was the key factor controlling the occurrence of martensitic stabilization and its resulting RTA or loss in shape memory effect, not the number of vacancies inside the martensites and their long-range diffusion. All reported results can be rationalized by the positive dependence of original N-vmb on the Ms temperature. (C) 2022 Published by Elsevier B.V.

Key words

Martensitic stabilization/Cu-based alloys/Shape memory effect/Martensitic transformation temperatures/Original vacancies sites/Dynamic ageing/PINNING-INDUCED STABILIZATION/RUBBER-LIKE BEHAVIOR/POINT-DEFECTS/ZN/FERROELASTICITY/TRANSFORMATION/STABILITY/ORIGIN

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出版年

2022
Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN：0925-8388
被引量3
参考文献量44
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