微粒子冲击梯度结构的动态形成--晶体塑性材料点法研究

IF 10.3 1区 工程技术 Q1 ENGINEERING, MANUFACTURING
Cong Chen, TianYuan Guan, Xianheng Wang, Yan Liu
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引用次数: 0

摘要

具有独特微观结构的金属材料可以实现理想的强度-电导率协同效应。然而,有效制造和精确控制金属中的微观结构分布仍然具有挑战性。微颗粒冲击是冷喷技术的关键过程,可在颗粒中形成梯度结构,这也可作为一种前景广阔的增材制造技术。为了研究异质微观结构的动态形成机制及其重要影响因素,我们开发了晶体塑性材料点法(CPMPM),尤其适用于高应变率和大变形下的微观结构形成。我们的研究对冲击过程中结构梯度的演变进行了定量分析。研究发现,晶粒尺寸越小,结构梯度越大,而对颗粒压缩比的影响则微乎其微。这表明可以通过优化冲击过程来调整微观结构分布,而不会影响颗粒的垂直变形。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Dynamic formation of gradient structure by microparticle impact — A crystal plasticity material point method study

Dynamic formation of gradient structure by microparticle impact — A crystal plasticity material point method study
Metallic materials with unique microstructure can achieve desirable strength-ductility synergy. However, effectively fabricating and precisely controlling microstructure distribution in metals remain challenging. Microparticle impact, the key process of cold spray technique, can lead to a gradient structure in the particle, which may also serve as a promising additive manufacturing technology. To investigate the dynamic formation mechanism of heterogeneous microstructure and its significant influencing factors, the crystal plasticity material point method (CPMPM) is developed, especially for microstructure formation under a high strain rate and large deformation. Our work provides a quantitative analysis of evolution of structural gradient during impact. It is found that decreasing grain size can afford a larger structural gradient and there is negligible influence on the compression ratio of particles. It suggests that microstructure distribution can be tailored by optimizing the impact process without influencing vertical deformation of particles.
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来源期刊
Additive manufacturing
Additive manufacturing Materials Science-General Materials Science
CiteScore
19.80
自引率
12.70%
发文量
648
审稿时长
35 days
期刊介绍: Additive Manufacturing stands as a peer-reviewed journal dedicated to delivering high-quality research papers and reviews in the field of additive manufacturing, serving both academia and industry leaders. The journal's objective is to recognize the innovative essence of additive manufacturing and its diverse applications, providing a comprehensive overview of current developments and future prospects. The transformative potential of additive manufacturing technologies in product design and manufacturing is poised to disrupt traditional approaches. In response to this paradigm shift, a distinctive and comprehensive publication outlet was essential. Additive Manufacturing fulfills this need, offering a platform for engineers, materials scientists, and practitioners across academia and various industries to document and share innovations in these evolving technologies.
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