A review on shape memory metallic alloys and their critical stress for twinning
A review on shape memory metallic alloys and their critical stress for twinning
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DOI：
10.1016/j.intermet.2018.11.005
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发表时间：
2019-02-01
期刊：
影响因子：
4.4
通讯作者：
Gonzalez, S.
中科院分区：
文献类型：
--
作者：
Nnamchi, P.;Younes, A.;Gonzalez, S.
形状记忆合金（SMA）是一类具有记忆原始形状能力的智能材料。形状记忆合金通过孪晶发生应力诱发马氏体相变，这是一种重要的变形机制，赋予强度和塑性。调整合金的变形孪晶能力能够优化其机械性能。本文综述了内、外参数对孪晶倾向的影响。在这些参数中，成分，晶粒尺寸，温度和应变速率的影响将被探索。此外，使用形状记忆相作为改善金属使用记忆行为的延展性的策略对于开发SMA用于多种应用（包括机械、汽车、航空航天、民用和生物医学工业）是非常重要的。还将讨论有关挑战和拟议解决方案的初步展望。
Shape Memory Alloys (SMAs) is a class of smart materials with the ability to remember the original shape. SMAs exhibit stress-induced martensitic transformation through twinning which is an important deformation mechanism that renders strength and ductility. Tailoring the capability of alloys for deformation twinning enables to optimise their mechanical performance. This paper presents a comprehensive review on the effect of internal and external parameters on the twinning propensity. Among these parameters, the effect of the composition, grain size, temperature and strain rate will be explored. In addition the use of shape memory phase as a strategy to improve the ductility of metallic use memory behaviour is of great importance to develop SMAs for multiple applications including mechanical, automotive, aerospace, civil and biomedical industries. A tentative outlook about the challenges and proposed solutions will be also discussed.