University of Oulu

Yongli Wu, Yi Xiong, Wei Liu, Zhengge Chen, Xin Zhang, Shubo Wang, Wei Cao, Effect of supersonic fine particle bombardment on microstructure and fatigue properties of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si titanium alloy at different temperatures, Surface and Coatings Technology, Volume 421, 2021, 127473, ISSN 0257-8972, https://doi.org/10.1016/j.surfcoat.2021.127473

Effect of supersonic fine particle bombardment on microstructure and fatigue properties of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si titanium alloy at different temperatures

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Author: Wu, Yongli1; Xiong, Yi1,2; Liu, Wei1,2;
Organizations: 1School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, Henan, China
2Collaborative innovation center of new nonferrous metal materials and advanced processing technology jointly established by the Ministry of science and technology, Luoyang 471023, Henan, China
3State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology, Xi'an 710024, Shanxi, China
4Nano and Molecular Systems Research Unit, University of Oulu, FIN-90014, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2021090645218
Language: English
Published: Elsevier, 2021
Publish Date: 2023-07-01
Description:

Abstract

In this work, supersonic fine particle bombardment (SFPB) was applied to modify surface of TC11 alloy and its impacts on microstructure and fatigue properties were systematically studied. The modified surface owned a nanoscale grain structure and a compressive residual stress with an amplitude of −196 MPa. The depth of hardened layer was about 300 μm. Afterwards, high-cycle fatigue behavior of SFPB modified alloy at −30 °C, 25 °C and 150 °C was studied, and the fracture surface, microstructure evolution, residual stress relaxation and microhardness of Ti alloy were characterized. The results show that the fatigue strength of the alloy is significantly improved by SFPB, and the fatigue strength decreases with the testing temperature. The deformation-induced martensite appears in the subsurface structure of Ti alloy tested at 25 °C and 150 °C, and the amount of deformation-induced martensite increases with the fatigue loading temperature. The compressive residual stress field induced by SFPB is relaxed in different degrees during fatigue loading. The degree of residual stress relaxation is the lowest under fatigue loading at 150 °C due to low cycle life. Mechanisms leading to the microstructural evolution and mechanical property variations were also proposed.

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Series: Surface & coatings technology
ISSN: 0257-8972
ISSN-E: 1879-3347
ISSN-L: 0257-8972
Volume: 421
Article number: 127473
DOI: 10.1016/j.surfcoat.2021.127473
OADOI: https://oadoi.org/10.1016/j.surfcoat.2021.127473
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
216 Materials engineering
Subjects:
Funding: Authors would like to acknowledge the financial support from the National Natural Science Foundation of China (Nos. U1804146, 51801054 and 52111530068), Program for Science, Technology Innovation Talents in Universities of Henan Province (No.17HASTIT026), Foreign Experts and Introduction Project of Henan Province (HNGD2020009), Science and Technology Innovation Team of Henan University of Science and Technology (No. 2015XTD006) as well as the Academy of Finland (No. 311934).
Copyright information: © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
  https://creativecommons.org/licenses/by-nc-nd/4.0/