Abstract Recent macroscopic experimental and theoretical evidence on the stress-strain-temperature behavior of NiTi beyond the strain recoverability limits (large strain, high stress, high temperature), where reversible martensitic transformation tends to proceed together with irreversible plastic deformation processes, is reviewed. Model predictions on the transformation – plasticity coupling are laid out based on the mathematical theory of martensitic microstructures and the crystal plasticity theory. A particular attention is paid to the strain compatibility at moving phase interfaces that may have a direct impact on the plasticity accompanying the martensitic transformation. It is suggested that strong transformation-plasticity coupling shall be expected during the reverse martensitic transformation. Macroscopic models from the literature capable of simulation of thermomechanical responses of NiTi polycrystals due to coexisting martensitic transformation and plastic deformation are reviewed. Dedicated thermomechanical loading experiments on superelastic and actuator NiTi wires aimed at improving our understanding of the coupling between martensitic transformation and plasticity are presented. Based on the results of in-situ studies during thermomechanical loading experiments (electric resistance, synchrotron X-ray diffraction, surface strain by DIC, relaxations) and characterization microstructures in deformed wires by TEM, it is shown that: (i) microstructures and consequently functional properties of annealed NiTi wires can be purposely manipulated by thermomechanical processing, (ii) shape setting of NiTi can be performed at relatively low temperatures (

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关于 NiTi 中马氏体相变和塑性之间的耦合：实验和基于连续介质的建模

摘要 回顾了最近关于 NiTi 超出应变恢复性极限（大应变、高应力、高温）的应力-应变-温度行为的宏观实验和理论证据，其中可逆马氏体转变倾向于与不可逆塑性变形过程一起进行。转变-塑性耦合的模型预测是基于马氏体显微组织的数学理论和晶体塑性理论进行的。特别注意移动相界面处的应变兼容性，这可能对伴随马氏体转变的塑性产生直接影响。建议在逆马氏体相变过程中预计会有很强的相变-塑性耦合。文献中的宏观模型能够模拟由于共存的马氏体转变和塑性变形引起的 NiTi 多晶的热机械响应。介绍了超弹性和致动器 NiTi 线的专用热机械加载实验，旨在提高我们对马氏体转变和塑性之间耦合的理解。基于热机械加载实验（电阻、同步加速器 X 射线衍射、DIC 的表面应变、弛豫）期间的原位研究结果和 TEM 对变形线材的微观结构进行表征，表明：（i）微观结构，因此退火镍钛丝的功能特性可以通过热机械加工有目的地控制，