STP956: The Effects of Temperature and Strain Rate on the Properties of (Fe,Ni)3V LRO Alloys

    Lin, HT
    Graduate student, associate professor, and alumni associate professor, Auburn University, Auburn, AL

    Wilcox, RC
    Graduate student, associate professor, and alumni associate professor, Auburn University, Auburn, AL

    Chin, BA
    Graduate student, associate professor, and alumni associate professor, Auburn University, Auburn, AL

    Pages: 9    Published: Jan 1987


    Abstract

    Tension tests with two distinctly different strain rates, 2.8 × 10−5 and 2.8 × 100 s−1, have been performed on the (Fe,Ni)3V long-range ordered (LRO) alloys in aged and unaged condition between 20 and 750°C. Tensile results as a function of test temperature indicate that the LRO alloys have good high-temperature strength. The yield strength of the ordered alloys increases with increasing test temperature, rather than decreasing as in conventional alloys. Long-term aging at 600°C has little or no effect on the elevated temperature tensile properties, and tends to reduce the sensitivity of aged materials to strain rate. The deformation mechanisms are changing as a function of test temperature, while there is a minor change in fracture characteristics over test temperature range. Oxidation features show the iron-base LRO alloys have limited oxidation resistance above 600°C.

    Keywords:

    long-range ordered alloys, tension test, strain rate effect, long-term thermal age, mechanical properties, scanning electron microscopy


    Paper ID: STP25658S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP25658S


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