Developing pure titanium with 1 GPa tensile strength and 24 % elongation by interstitial oxygen doping

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

Materials Characterization Pub Date : 2025-07-08 DOI:10.1016/j.matchar.2025.115362

Bingbing Cai , Mingju Chen , Biao Chen , Jie Wan , Jianghua Shen , Katsuyoshi Kondoh , Jinshan Li

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Abstract

Interstitial oxygen in the octahedral sites, could strengthen titanium (Ti) and its alloys efficiently. However, oxygen tends to segregate along matrix grain boundaries, which could cause severe embrittlement. Herein, we utilized a plenary ball milling process to gradually introduce oxygen into pure Ti, which was found to be capable of doping up to 0.63 wt% of equivalent interstitial oxygen ([O]_eq = [O] + 2[N], in wt%) into the Ti matrix homogeneously. Tensile tests revealed that the TiO with 0.63 wt% of [O]_eq exhibited an excellent ductility of 24.2 % in elongation and high tensile strength of 1018 MPa, which results in a high strengthening efficiency of 624 MPa per wt% of [O]_eq. A quantitative analysis on strengthening mechanism further confirmed the superior strengthening effect of interstitial oxygen via solid solution strengthening. This study may provide guidance for the development of high-performance yet cost-effective Ti materials.

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采用间质氧掺杂法制备抗拉强度为1gpa，延伸率为24%的纯钛

八面体位置的间隙氧能有效强化钛及其合金。然而，氧倾向于沿基体晶界偏析，这可能导致严重的脆化。在此，我们利用全球磨工艺逐渐将氧引入纯Ti中，发现能够将高达0.63 wt%的等效间隙氧（[O]eq = [O] + 2[N], wt%）均匀地掺杂到Ti基体中。拉伸试验结果表明，当[O]当量为0.63 wt%时，tio2的延展性为24.2%，拉伸强度为1018 MPa，强化效率为624 MPa / wt%。强化机理的定量分析进一步证实了间隙氧通过固溶体强化的优越强化效果。本研究可为高性能、低成本钛材料的开发提供指导。

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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.