Quantitative analysis of the microstructure of near β titanium alloy during compression tests

F. Warchomicka*, M. Stockinger, H. P. Degischer

*Corresponding author for this work

    Research output: Contribution to journalArticle

    Abstract

    Near β titanium alloys present better formability at moderate temperatures compared to α-β alloys. On the other hand, the strength of the forged workpiece is markedly increased after heat treatments by α-phase precipitation hardening. These properties make these high strength Ti-alloys attractive for aircraft and aerospace components. In this work, the formability of Ti-10V-2Fe-3Al is studied. Hot compression tests with cylindrical specimens are performed by means of a Gleeble® 1500 machine at temperatures below β-transus (788 °C) and at constant strain rates of 0.01, 0.1 and 1 s-1. The flow curves show a continuous softening at 0.1 and 1 s-1 after an initial stress peak, and steady flow at low strain rate (0.01 s-1). The evolution of the microstructure for specimens deformed to different strain levels is examined. A quantitative analysis of SEM images is carried out to determine the distribution, shape and content of α phase before and after deformation. The local strain within the compression specimens is determined by a finite element method and correlated to the microstructure.

    Original languageEnglish
    Pages (from-to)473-477
    Number of pages5
    JournalJournal of materials processing technology
    Volume177
    Issue number1-3
    DOIs
    Publication statusPublished - 3 Jul 2006

    Keywords

    • Alpha phase morphology
    • Flow curves
    • Hot deformation
    • Near beta titanium alloys
    • Quantitative metallography
    • Ti-10-2-3

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Modelling and Simulation
    • Computer Science Applications
    • Metals and Alloys
    • Industrial and Manufacturing Engineering

    Fields of Expertise

    • Advanced Materials Science

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