Effect of heat treatment on microstructure evolution mechanism of hydrogenated TC4 alloy via friction stir processing

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

Materials Characterization Pub Date : 2025-09-27 DOI:10.1016/j.matchar.2025.115594

Jie Yao , Yunjing Xing , Guoqing Dai , Zhonggang Sun , Yanhua Guo , Hui Chang , Yang Liu , Lian Zhou , Igor V. Alexandrov

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引用次数: 0

Abstract

In recent years, friction stir processing (FSP) of the TC4 alloy has drawn growing attention. This is attributed to its advantages, including low cost, high efficiency, and the ability to control the microstructure and enhance mechanical properties. Nevertheless, research on Friction stir processed (FSPed) TC4 alloy still encounters several challenges. Firstly, the substantial deformation resistance during processing hinders material deformation. Secondly, the short service life of the costly W25Re alloy stirrer raise processing costs. Therefore, reducing the deformation resistance of the TC4 alloy during FSP is crucial for overcoming the application bottleneck of titanium alloys. In this study, TC4–0.37wt.%H alloy was fabricated and subjected to FSP. The addition of hydrogen significantly reduced the material's deformation resistance, thereby prolonging the service life of the stirring tool. However, to improve the mechanical property degradation caused by hydrogen embrittlement, post-treatments were carried out on the FSPed TC4–0.37wt.%H alloy. These treatments include dehydrogenation treatment (No.1), solution-dehydrogenation treatment (No.2), and solution-aging-dehydrogenation treatment (No.3). The research findings revealed that specimens containing hydrogen exhibited markedly inferior mechanical properties. After dehydrogenation treatment, the tensile strength of the No.1 specimen increased considerably, from 546.5 MPa to 1023.9 MPa. However, there was no notable improvement in elongation. Notably, the elongation of No.2 specimen reached a maximum of 10 %. Meanwhile, the tensile strength of No.3 specimen achieved the highest value of 1268.2 MPa. Additionally, the microstructural evolution mechanism of hydrogened titanium alloys was explored, providing a theoretical foundation for expanding the application of FSPed titanium alloys.

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热处理对搅拌摩擦加氢TC4合金组织演化机理的影响

近年来，TC4合金的搅拌摩擦加工（FSP）受到越来越多的关注。这归功于它的优点，包括低成本，高效率，以及控制微观结构和提高机械性能的能力。然而，搅拌摩擦加工（FSPed） TC4合金的研究仍然面临着一些挑战。首先，加工过程中较大的变形阻力阻碍了材料的变形。其次，昂贵的W25Re合金搅拌器使用寿命短，提高了加工成本。因此，降低TC4合金在FSP过程中的变形抗力是克服钛合金应用瓶颈的关键。在本研究中，TC4-0.37wt。制备了%H合金并进行了FSP处理。氢气的加入显著降低了材料的抗变形能力，从而延长了搅拌工具的使用寿命。然而，为了改善氢脆引起的力学性能退化，对FSPed TC4-0.37wt进行了后处理。% H合金。这些处理包括脱氢处理（No.1）、溶液-脱氢处理（No.2）和溶液-老化-脱氢处理（No.3）。研究结果表明，含氢试样的力学性能明显较差。脱氢处理后，1号试样的抗拉强度显著提高，由546.5 MPa提高到1023.9 MPa。然而，伸长率没有显著提高。值得注意的是，2号试件的伸长率最高达到10%。3号试件抗拉强度最高，达到1268.2 MPa。并对氢化钛合金的微观组织演化机理进行了探讨，为扩大FSPed钛合金的应用提供了理论基础。

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.