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Effect of Nitrogen on Age-Hardening of Metastable Austenitic Stainless Steel after Cold Drawing

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Abstract:

Metastable austenitic stainless steels transform to the deformation-induced martensite by cold working. Especially, metastable stainless steel with high nitrogen content has high age-hardening property after aging treatment. In this work, effect of nitrogen on age-hardening of metastable austenitic stainless steel (SUS304: 0.04% N, type-SUS201: 0.18% N) after cold drawing was investigated, and age-hardening mechanism was elucidated. Strength after cold drawing of SUS201 containing high N is higher than that of SUS304, and the age-hardening of SUS201 is significantly higher than that of SUS304 at the aging temperature of 200 ~ 500°C. It is suggested that strengthening mechanism of SUS201 is caused by aging products of N, because exothermal reaction in SUS201 is clearly recognized at low aging temperature by DSC analysis.

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Periodical:

Materials Science Forum (Volume 879)

Pages:

2164-2169

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.879.2164

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Online since:

November 2016

Authors:

S. Yamasaki*, K. Takano

Keywords:

Age-Hardening, DSC, Nitrogen, Stainless Steel

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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