Effect of Stable and Metastable Phase Microstructures on Mechanical Properties of Ti-33Nb Alloys.

IF 3.1 3区材料科学 Q3 CHEMISTRY, PHYSICAL

Materials Pub Date : 2025-05-18 DOI:10.3390/ma18102351

Shitao Fan, Yingqi Zhu, Na Min

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Abstract

In this paper, the crystal structure, microstructure, and deformation behavior in the Ti-33Nb alloy under furnace-cooling (FC) and water-quenching (WQ) conditions after holding at 950 °C for 0.5 h are reviewed. The stable and metastable phases obtained under FC and WQ heat treatments have significantly different influences on the mechanical properties of this alloy. The furnace-cooling specimens possess a β and α phase at room temperature, while water-quenched specimens are composed of a metastable β phase and martensite α″ phase. According to the results of the nanoindentation test, the hardness value of the FC specimens is 2.66 GPa, which is lower than that of the WQ specimens. It can be attributed to the presence of a large number of α phases. The indentation depth recovery ratio (η_h) and work recovery ratio (η_w) of the WQ specimens are 19.02% and 19.54%, respectively, indicating a better superelastic response than the FC specimens. In addition, the wear resistance (H/E_r) and yield pressure (H3/Er2) of the WQ specimens are 0.0282 and 0.0030 GPa, respectively, suggesting a better wear resistance and resistance of plastic deformation.

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稳定与亚稳相组织对Ti-33Nb合金力学性能的影响

本文综述了Ti-33Nb合金在950℃保温0.5 h后，在炉冷（FC）和水淬（WQ）条件下的晶体结构、显微组织和变形行为。在FC和WQ热处理下获得的稳定相和亚稳相对该合金的力学性能有显著不同的影响。炉冷试样在室温下主要由β相和α相组成，而水淬试样主要由亚稳β相和马氏体α″相组成。纳米压痕试验结果显示，FC试件的硬度值为2.66 GPa，低于WQ试件。这可归因于大量α相的存在。WQ试件的压痕深度恢复比（ηh）和功恢复比（ηw）分别为19.02%和19.54%，超弹性响应优于FC试件。WQ试样的耐磨性（H/Er）和屈服压力（H3/Er2）分别为0.0282和0.0030 GPa，具有较好的耐磨性和抗塑性变形性。

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来源期刊

Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

5.80

自引率

14.70%

发文量

7753

审稿时长

1.2 months

期刊介绍： Materials (ISSN 1996-1944) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Materials provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of materials. Chemical syntheses, chemical structures and mechanical, chemical, electronic, magnetic and optical properties and various applications will be considered.