Understanding creep mechanisms of a Cu-Cr-Nb alloy by testing under constant structure conditions

نویسندگان

چکیده

Abstract Stress reduction creep tests conducted on a Cu-Cr-Nb alloy (GRCop-84) at 923 K have confirmed local dislocation climb to be the rate-controlling deformation mechanism. The activation energy of was measured consistent with that self-diffusion in Cu matrix. An internal back stress approximately -9 MPa identified act dislocations, which is believed sum for dislocation-particle interaction and forward dislocation-dislocation interaction. This stress, however, does not lead true threshold framework thermally activated motion.

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ژورنال

عنوان ژورنال: Scripta Materialia

سال: 2021

ISSN: ['1359-6462', '1872-8456']

DOI: https://doi.org/10.1016/j.scriptamat.2020.08.036