A Visualized Microstructure Evolution Model Integrating an Analytical Cutting Model with a Cellular Automaton Method during NiTi Smart Alloy Machining

IF 2.4 4区材料科学 Q2 CRYSTALLOGRAPHY

Crystals Pub Date : 2024-07-23 DOI:10.3390/cryst14080672

Jiaqi Wang, Ming Li, Qingguang Li, Xianchao Pan, Zixuan Wang, Jing Jia, Renti Liu, Yunguang Zhou, Lianjie Ma, Tianbiao Yu

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引用次数: 0

Abstract

In this study, a visualized microstructure evolution model for the primary shear zone during NiTi smart alloy machining was established by integrating an analytical cutting model with a cellular automaton method. Experimental verification was conducted using an invented electromagnet rotation-type quick-stop device. The flow stress curve during the dynamic recrystallization of the NiTi smart alloy, the influence of relevant parameters on the dynamic recrystallization process, and the distribution of dynamic recrystallization in the primary shear zone were studied via the model. The simulation results showed that strain rate and deformation temperature significantly affect the relevant parameters during the dynamic recrystallization process. Three typical shear planes were selected for a comparison between simulation results and experimental results, with a minimum error of 3.76% and a maximum error of 11.26%, demonstrating that the model accurately simulates the microstructure evolution of the NiTi smart alloy during the cutting process. These results contribute theoretical and experimental insights into understanding the cutting mechanism of the NiTi smart alloy.

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镍钛智能合金加工过程中的可视化微结构演变模型，将分析切削模型与细胞自动机方法相结合

本研究通过将分析切削模型与单元自动机方法相结合，建立了镍钛智能合金加工过程中一次剪切区的可视化微观结构演变模型。利用发明的电磁铁旋转式快速停止装置进行了实验验证。通过模型研究了镍钛智能合金动态再结晶过程中的流动应力曲线、相关参数对动态再结晶过程的影响以及动态再结晶在初级剪切区的分布。模拟结果表明，应变速率和变形温度对动态再结晶过程中的相关参数有显著影响。选取了三个典型的剪切平面进行了模拟结果与实验结果的对比，结果表明该模型准确模拟了镍钛智能合金在切削过程中的微观结构演变，最小误差为 3.76%，最大误差为 11.26%。这些结果为理解镍钛智能合金的切削机理提供了理论和实验见解。

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来源期刊

Crystals CRYSTALLOGRAPHYMATERIALS SCIENCE, MULTIDIS-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

4.20

自引率

11.10%

发文量

1527

审稿时长

16.12 days

期刊介绍： Crystals (ISSN 2073-4352) is an open access journal that covers all aspects of crystalline material research. Crystals can act as a reference, and as a publication resource, to the community. It publishes reviews, regular research articles, and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on article length. Full experimental details must be provided to enable the results to be reproduced. Crystals provides a forum for the advancement of our understanding of the nucleation, growth, processing, and characterization of crystalline materials. Their mechanical, chemical, electronic, magnetic, and optical properties, and their diverse applications, are all considered to be of importance.