Deformation response analysis of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy under electromagnetic shock treatment via nanoindentation

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-09-05 DOI:10.1016/j.matchar.2025.115551

Jian Zhou , Xia Li , Chaoyi Ding , Fanrong Zhang , Yan Wen , Liqiang Wang , Lai-Chang Zhang , Lechun Xie , Lin Hua

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引用次数: 0

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 (α_s) disappeared, and numerous needle-like martensitic phases (α_M) 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 E_IT 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.

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Ti-6.5Al-3.5Mo-1.5Zr-0.3Si合金纳米压痕电磁冲击变形响应分析

微观力学性能对部件的使用寿命和疲劳性能起着至关重要的作用。本文提出了一种新的电磁冲击处理（EST）方法，旨在均匀Ti-6.5Al-3.5Mo-1.5Zr-0.3Si合金的微观组织，提高其微观力学性能，并通过基于阵列的纳米压痕技术验证了其有效性。实验结果表明，EST作用0.12 s后，次生α相（αs）消失，大量针状马氏体相（α m）析出。力-位移（P-h）曲线表明，基体抗变形能力增强，弹性恢复能力降低。显微硬度H从4.81 GPa增加到5.43 GPa，标准差σ从0.20降低到0.19，弹性模量EIT从116.10 GPa降低到111.56 GPa， σ从2.49降低到2.24。压痕形貌表明，压痕的一致性显著提高，压痕尺寸平均值降低了10.5%。原子力显微镜（AFM）结果显示，三维压痕的高度差减小。EST抑制了局部硬化现象的发生，并表现出明显的尺寸效应。这些结果证实了EST是均匀化微观结构和提高微观力学响应行为的有效方法。此外，EST可以为金属合金电磁耦合强化机理的研究提供理论指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.