Influence Of Strain Rate On Tensile And LCF Properties Of Prior Cold
Worked 316L Stainless Steel In Dynamic Strain Aging Regime
Author(s)
S.-G. Hong & S.-B.Lee
Abstract
Influence of strain rate on tensile and LCF
properties of prior cold worked 316L stainless
steel in dynamic strain aging regime
S.-G. Hong & S.-B. Lee
Department of Mechanical Engineering,
Korea Advanced Institute of Science and Technology,
Republic of Korea
Abstract
Tensile and LCF (low cycle fatigue) tests were carried out in air in a wide
temperature range of 20°C-750°C and strain rates of 1 ~ 1 0 ~ ~ / s - l ~ 1 0 ~ ~ / s to
investigate the influence of strain rates on the tensile and LCF properties of prior
cold worked 316L stainless steel, especially in the DSA (dynamic strain aging)
regime. Dynamic strain aging induced a change in tensile properties such as
strength and ductility in the temperature region 250°C-600°C, and this
temperature region coincided well with the negative strain rate sensitivity
regime. Cyclic stress responses at all test conditions were characterized by the
initial hardening during a few cycles, followed by gradual softening until final
failure. The DSA regimes
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