Ductile-to-Brittle Transition Behavior of High-Nitrogen 18Cr-10Mn-0.35N Austenitic Steels Containing Ni and Cu
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- Title
- Ductile-to-Brittle Transition Behavior of High-Nitrogen 18Cr-10Mn-0.35N Austenitic Steels Containing Ni and Cu
- Authors
- Byoung Chul Hwang; Tae Ho Lee; Seong Jun Park; Chang Seok Oh; Kim, SJ
- Date Issued
- 2010-06
- Publisher
- Trans Tech Publications Ltd.
- Abstract
- Ductile-to-brittle transition behavior of high-nitrogen 18Cr-10Mn-0.35N austenitic steels containing Ni and Cu was investigated by means of Charpy impact test and fractographic analysis. The commonly observed fracture mode of the specimens tested at -196 degrees C was transgranular cleavage-like brittle with flat facets occurring along {111} crystallographic planes, thereby leading to the occurrence of ductile-to-brittle transition. For all the steels investigated in the present study, the ductile-to-brittle transition temperature (DBTT) measured from Charpy impact tests was much higher by 90 to 135 degrees C than that predicted by empirical equation strongly depending on N content. The combined addition of Ni and Cu enabled the 18Cr-10Mn-0.35N steels to have the lowest DBTT, which could be explained by relatively high austenite stability and favorable effect of Cu as well as the absence of delta-ferrite.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/38182
- DOI
- 10.4028/www.scientific.net/MSF.654-656.158
- ISSN
- 0255-5476
- Article Type
- Article
- Citation
- Materials Science Forum, vol. 654-656, no. 1, page. 158 - 161, 2010-06
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- There are no files associated with this item.
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