利用高分辨率数字图像相关技术研究Ti6Al4V中微尺度滑动系统活动

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-04-04 DOI:10.1016/j.matchar.2025.114997

Bo Pang

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引用次数: 0

摘要

采用高分辨率数字图像相关（HRDIC）、电子背散射衍射（EBSD）、痕量分析和相对位移比（RDR）分析，定量表征了Ti6Al4V合金在单轴拉伸下的滑移系统行为。结果强调了不同滑动系统的重要作用，特别是<；a >；交叉滑移是塑性变形的主要原因。尽管在大量有利取向晶粒中频繁激活，<c + a >；与滑动系统相比，滑动系统只贡献了有限的一部分总应变。滑移线表现出更高的应变和更明显的活动。应变的中尺度分布利用基于晶粒的HRDIC图进行表征，揭示了受晶体取向和局部微观结构影响的应变水平变化。滑移活度最小晶粒的残余压缩应变表明邻近缺陷存储量较高晶粒的影响。

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Meso/micro scale slip system activity study in Ti6Al4V using high resolution digital image correlation

The slip system behaviour of Ti6Al4V alloy under uniaxial tension was quantitatively characterised using a combination of high-resolution digital image correlation (HRDIC), electron backscatter diffraction (EBSD), trace analysis, and relative displacement ratio (RDR) analysis. The results highlight significant roles played by different slip systems, notably <a > cross slip, which contributes substantially to the plastic deformation. Despite frequent activation in a large number of favourably oriented grains, <c + a > slip systems contribute a limited portion only of the overall strain, in contrast to the <a > slip lines that demonstrate higher strain and more pronounced activity. The meso-scale distribution of strain is characterised using a grain-based HRDIC map, revealing variable strain levels influenced by crystal orientations and local microstructure. Compressive residual strain in grains with minimal slip activity indicates the influence of neighbouring grains with higher defect storage.

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.