镍钛诺中Ni4Ti3沉淀过程中外部载荷的变体选择图:理论和相场研究

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中文摘要：Ni4Ti3沉淀物的形态对于调节镍钛诺的马氏体转变行为和力学性能非常重要。由于缺乏外部载荷的变体选择效应，限制时效在工程化Ni4Ti3沉淀物的形态方面非常有效。在本研究中，通过结合理论分析和相场模拟，获得了沿所有晶体学方向施加外部载荷的变体选择效应图。发现单向拉伸和单向压缩产生的图谱存在很大差异。外部载荷优选的Ni4Ti3变体的数量和类型随着加载方向的变化而变化。此外，还发现了影响变体选择效应强度的因素。这项工作为理解Ni4Ti3沉淀过程提供了见解，并为获得所需的机械和功能特性的Ni4Ti3沉淀物形态工程提供了启示。

外文标题：Variant selection map of external load during Ni4Ti3 precipitation in nitinol:a theoretical and phase field study

外文摘要：The morphology of Ni4Ti3 precipitates is important in tuning the martensitic transformation(MT)behavior and mechanical properties of nitinol.Constrained ageing is effective in engineering the morphology of Ni4Ti3 precipitates due to the variant selection effect of external load which is still lacking.In this work,maps of variant selection effect of external load applied along all crystallographic directions are obtained by using a combination of theoretical analyses and phase field simu-lations.It is found that maps produced by uniaxial tension and uniaxial compression are quite different.The number and types of Ni4Ti3 variants preferred by external load vary as the loading direction changes.Moreover,factors influencing the strength of variant selection effect are discovered.This work provides insights on understanding the Ni4Ti3 precipitation process and sheds light on the engineering of morphology of Ni4Ti3 precipitates for desired mechanical and functional properties.

外文关键词：

Ni4Ti3Variant selectionNiTi alloyPhase field modelPrecipitation morphology

作者：

周学伟、张天隆、程利、杨许生、朱家明

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作者单位：

School of Civil Engineering,Shandong University,Jinan 250061,China

Department of Mechanical Engineering,Hong Kong University of Science and Technology,Hong Kong,China

State Key Laboratory of Ultra-precision Machining Technology,Department of Industrial and Systems Engineering,The Hong Kong Polytechnic University,Hong Kong,China

Shenzhen Research Institute of Shandong University,Shenzhen 518057,China

Institute of Materials Intelligent Technology Shenyang 110004,China

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关键词：

Ni4Ti3 Variant selection NiTi alloy Phase field model Precipitation morphology

基金：

National Natural Science Foundation of ChinaQilu Young Talent Program of Shandong University,Zhejiang Lab Open Research ProjectShandong Provincial Natural Science FoundationGuangdong Basic and Applied Basic Research Foundation

项目编号：

12372152K2022PE0AB05ZR2023MA0582023A1515011819

出版年：

2024

DOI：

10.1007/s10409-023-23480-x

力学学报(英文版)

CSTPCD

影响因子：0.363

ISSN：0567-7718

年,卷(期)：2024.40(7)