STP569: High Strain Fatigue in a Ni(Cr)-TaC Fibrous Eutectic

    Henry, MF
    Metallurgist, General Electric Corporate Research and Development Center, Schenectady, N. Y.

    Stoloff, NS
    Professor of Materials Engineering, Rensselaer Polytechnic Institute, Troy, N. Y.

    Pages: 21    Published: Jan 1975


    Abstract

    The eutectic Ni(Cr)-TaC has been directionally solidified to yield a fibrous composite. The material was studied in strain-limited low-cycle fatigue at room temperature and 1000°C. The eutectic with brittle fibers and a ductile matrix was found to obey the Coffin-Manson law at both temperatures. The hysteresis behavior is explained and related to tensile deformation. Surface studies of highly polished cyclic-bend specimens revealed the fatigue crack nucleation and early growth characteristics. The data are compared to conventional materials, and the fatigue resistance is found to be essentially equivalent.

    Keywords:

    fatigue tests, eutectics, composite materials, solidification, life prediction, crack initiation, hysteresis


    Paper ID: STP33173S

    Committee/Subcommittee: E08.09

    DOI: 10.1520/STP33173S


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