MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Hot Tensile Deformation and Fracture Behavior of a Nitrogen Alloyed Ultralow Carbon Austenitic Stainless Steel
Xiaoya YangAn HeShilei LiHailong ZhangXitao Wang
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2015 Volume 56 Issue 12 Pages 1984-1991

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Abstract

The hot tensile deformation and fracture behavior of a nitrogen alloyed ultralow carbon austenitic stainless steel were studied by a Gleeble-1500D thermo-mechanical simulator with the temperature range of 1173–1473 K and strain rate range of 0.01–1 s−1. Microstructural evolution was analyzed in terms of fractography at various deformation temperatures and strain rates. The tensile true stress-true strain curves after necking were calculated by the heuristic method. The fracture threshold values of the studied steel were estimated by finite element method (FEM). The final load-stroke curves obtained from the FEM simulation were found to have a good agreement with the experimental load-stroke curves. The quantitative relationship between fracture threshold value and Zener-Hollomom parameter was also established. The results are beneficial to the understanding of hot deformation behavior of a wide range of stainless steels.

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© 2015 The Japan Institute of Metals and Materials
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