Deformation response analysis of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy under electromagnetic shock treatment via nanoindentation
Author Identifier (ORCID)
Lai Chang Zhang: https://orcid.org/0000-0003-0661-2051
Abstract
The microscale mechanical properties play a crucial role in determining the service life and fatigue performance of components. In this work, A novel electromagnetic shock treatment (EST) method aims to homogenize the microstructure and improve the microscale mechanical properties of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy, with its effectiveness validated through array-based nanoindentation technology. The experimental results indicated that, after 0.12 s of EST, the secondary α phase (αs) disappeared, and numerous needle-like martensitic phases (αM) precipitated. Force-displacement (P-h) curve indicated that the matrix resistance to deformation was enhanced and the elastic recovery capability was reduced. The microhardness H increased from 4.81 GPa to 5.43 GPa and the standard deviation σ decreases from 0.20 to 0.19, whereas the elastic modulus EIT decreased from 116.10 GPa to 111.56 GPa and the σ decreases from 2.49 to 2.24. The indentation imprint morphology showed that the consistency of the indentation imprints was significantly improved, and the average value of the indentation imprint size decreases by 10.5 %. Atomic force microscopy (AFM) results revealed the height difference of the three-dimensional indentation imprint decreased. EST suppressed the occurrence of localized hardening phenomenon and exhibited pronounced size effect. These findings confirmed that EST was an effective method for homogenizing the microstructure and enhancing the microscale mechanical response behavior. Moreover, EST could provide theoretical guidance on the strengthening mechanisms of metallic alloys through electromagnetic coupling methods.
Document Type
Journal Article
Date of Publication
11-1-2025
Volume
229
Publication Title
Materials Characterization
Publisher
Elsevier
School
Centre for Advanced Materials and Manufacturing / School of Engineering
Funders
National Natural Science Foundation of China (92266102) / National Natural Science Foundation of China (52271135, 52433016, 52571177) / National Key Research and Development Program of China (2024YFB4609700) / Open Project of Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials (GFST2024KF05) / Innovative Research Group Project of Hubei Provincial Natural Science Foundation (2025AFA014)
Copyright
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Comments
Zhou, J., Li, X., Ding, C., Zhang, F., Wen, Y., Wang, L., Zhang, L., Xie, L., & Hua, L. (2025). Deformation response analysis of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy under electromagnetic shock treatment via nanoindentation. Materials Characterization, 229, 115551. https://doi.org/10.1016/j.matchar.2025.115551