Comprehending interface shearing behavior within a bulk Cu-Nb alloy using micromechanical testing

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

Materials Characterization Pub Date : 2025-03-10 DOI:10.1016/j.matchar.2025.114928

Tanvi Ajantiwalay , Farhan Ishrak , Aniruddha Malakar , Mayur Pole , Lei Li , Ayoub Soulami , Xiaolong Ma , Mark Wirth , Arun Devaraj , Bharat Gwalani

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引用次数: 0

Abstract

Understanding the deformation mechanisms behind microstructural evolution during shear loading has been a long-standing area of interest. However, establishing a connection between microstructure, mechanical properties, and the extent of shear deformation is challenging and requires refined experimental approaches. Micro-shear testing offers a controlled method to introduce shear into small volumes of material, allowing for detailed site-specific microstructural characterization. In this work, we investigated the shear deformation behavior and properties of copper (Cu) matrix and at copper‑niobium (Cu-Nb) interfaces using micro-shear testing. The yielding under shear loading is dependent on the orientation of the interfaces. Intuitively, when the interface is along the shear direction, the flow stresses are lower compared to when it is across. Transmission electron microscopy examination shows stacking faults and high dislocation density dominating the deformation on the Cu side while limited dislocation activity in the neighboring Nb crystal. Moreover, an amorphous layer was observed at the Cu-Nb interface which likely formed after shear deformation. In summary, our study provides an understanding of the shear deformation behavior of phase-interfaces in an immiscible system at a micro-scale. The focus of the paper is demonstrating the applicability of the S-shaped pillar geometry for local shear measurements and deformation of specifically oriented interface boundaries.

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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.