利用晶体塑性模拟研究球形缺陷周围局部场的取向依赖性

IF 6.2 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
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引用次数: 0

摘要

空洞或次生颗粒的存在对金属的机械响应和损伤演变都起着至关重要的作用。这项研究利用晶体塑性有限元法(CP-FEM)模拟,对含有球形空隙或硬质颗粒的单晶基体中的局部应力和应变场进行了预测。模拟结果表明,在缺陷附近存在高度异构的取向依赖性局部场。特别是,我们表明,在应变控制的单轴拉伸和等速加载条件下,硬颗粒周围的基体会首先发生解粘,然后才会在预先存在的空隙中发生空隙增长。此外,CP-FEM 模拟预测[1̄11]取向的晶粒最容易失效,而[001]取向的晶粒则更耐失效。这项研究深入揭示了具有体积缺陷的晶粒尺度微结构如何影响金属合金的局部损伤和失效行为。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Investigating the orientation dependence of local fields around spherical defects using crystal plasticity simulations

Investigating the orientation dependence of local fields around spherical defects using crystal plasticity simulations

The presence of a void or secondary particle plays a crucial role in both the mechanical response and damage evolution of metals. This work presents local stress and strain field predictions in a single crystalline matrix that contains a spherical void or hard particle using crystal plasticity finite element method (CP-FEM) simulations. Simulations demonstrate highly heterogeneous orientation dependent local fields near defects. In particular, we show that matrix decohesion around hard particles will occur first before void growth in pre-existing voids under strain-controlled uniaxial tension and isochoric loading. Furthermore, CP-FEM simulations predict that the [1̄11]-oriented grain is most susceptible for failure, while grains oriented toward the [001] orientation are more resistant to failure. This work provides insights into how grain-scale microstructure with volumetric defects influence the local damage and failure behavior in metal alloys.

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来源期刊
Journal of Materials Research and Technology-Jmr&t
Journal of Materials Research and Technology-Jmr&t Materials Science-Metals and Alloys
CiteScore
8.80
自引率
9.40%
发文量
1877
审稿时长
35 days
期刊介绍: The Journal of Materials Research and Technology is a publication of ABM - Brazilian Metallurgical, Materials and Mining Association - and publishes four issues per year also with a free version online (www.jmrt.com.br). The journal provides an international medium for the publication of theoretical and experimental studies related to Metallurgy, Materials and Minerals research and technology. Appropriate submissions to the Journal of Materials Research and Technology should include scientific and/or engineering factors which affect processes and products in the Metallurgy, Materials and Mining areas.
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