Microstructure and high cycle fatigue fracture surface of a Ti-5Al-5Mo-5V-1Cr-1Fe titanium alloy

G.Q. Wu, C.L. Shi, W. Sha, A.X. Sha, H.R. Jiang

    Research output: Contribution to journalArticle

    36 Citations (Scopus)
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    Abstract

    Because of the requirements for the damage tolerance and fatigue life of commercial aircraft components, the high cycle fatigue (HCF) properties of Ti–5Al–5Mo–5V–1Cr–1Fe titanium alloy forgings are important. The effects of microstructure types of the α+β titanium alloy on fatigue properties need to be understood. In this paper, by analysing the fracture surfaces of the titanium alloy having four types of microstructure, the effects of microstructure are investigated. The differences of initiation areas and crack propagation among different microstructures were studied. It was found that the area of the initiation region decreases in the order of coarse basketweave, fine basketweave, Widmanstätten, and bimodal microstructure.
    Original languageEnglish
    Pages (from-to)111–118
    Number of pages8
    JournalMaterials Science and Engineering A
    Volume575
    Early online date27 Mar 2013
    DOIs
    Publication statusPublished - 15 Jul 2013

    Keywords

    • Titanium alloy
    • Bimodal microstructure
    • Lamellar microstructure
    • Basketweave microstructure
    • High cycle fatigue
    • Initiation region

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