Strength and fatigue properties enhancement in ultrafine-grained Ti produced by severe plastic deformation

Semenova, I. P. and Valiev, R. Z. and Yakushina, E. B. and Salimgareeva, G. H. and Lowe, T. C. (2008) Strength and fatigue properties enhancement in ultrafine-grained Ti produced by severe plastic deformation. Journal of Materials Science, 43 (23-24). pp. 7354-7359. ISSN 0022-2461 (https://doi.org/10.1007/s10853-008-2984-4)

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Abstract

Severe plastic deformation (SPD) of titanium creates an ultrafine-grained (UFG) microstructure which results in significantly enhanced mechanical properties, including increasing the high cycle fatigue strength. This work addresses the challenge of maintaining the high level of properties as SPD processing techniques are evolved from methods suitable for producing laboratory scale samples to methods suitable for commercial scale production of titanium semi-products. Various ways to optimize the strength and fatigue endurance limit in long-length Grade 4 titanium rod processed by equal channel angular pressing (ECAP) with subsequent thermal mechanical treatments are considered in this paper. Low-temperature annealing of rods is found to increase the fatigue limit, simultaneously enhancing UFG titanium strength and ductility. The UFG structure in titanium provides an optimum combination of properties when its microstructure includes mostly equiaxed grains with high-angle boundaries, the volume fraction of which is no less than 50%.

  • Item type:Article
    ID code:86831
    Dates:
    Date
    Event
    1 December 2008
    Published
    2 September 2008
    Accepted
    19 June 2008
    Submitted
    Subjects:Technology > Manufactures
    Department:UNSPECIFIED
    Depositing user: Pure Administrator
    Date deposited:03 Oct 2023 10:57
    Last modified:09 Apr 2024 04:17
    URI:https://strathprints.strath.ac.uk/id/eprint/86831
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