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The effect of the interruption of straining on non-uniform plastic flow in tension

1982; Elsevier BV; Volume: 52; Issue: 2 Linguagem: Inglês

10.1016/0025-5416(82)90041-6

1873-4928

G. Ferron,

Metal Alloys Wear and Properties

An examination of the tensile instability in materials that exhibit strain hardening, strain rate hardening and temperature softening was made. A simple analytical model shows that the development of thermal gradients plays a detrimental part in the stability of plastic flow. Furthermore, an extension of the model to the case of discontinuous straining reveals that the removal of thermal gradients resulting from an interruption of the test delays the further growth of rate gradients. The analytical predictions are compared with the results from discontinuous tension tests on austenitic stainless steel specimens.