|About this Abstract
||2010 TMS Annual Meeting & Exhibition
||General Abstracts: Structural Materials Division
||Characteristics of High Interstitially Alloyed 18Cr-10Mn Stainless Steels
||Chang-Seok Oh, Tae-Ho Lee, Heon-Young Ha, Sung-Joon Kim
|On-Site Speaker (Planned)
Some results of characterizations on Cr-Mn stainless steels with combined addition of carbon and nitrogen are presented, where high nitrogen alloyed steels having same compositions of Cr and Mn were chosen for reference. High nitrogen alloyed steels (HNS) of 18Cr-10Mn-(0.4-0.7)N and high interstitially alloyed steels (HIA) of 18Cr-10Mn-0.38C-0.38N and 18Cr-10Mn-0.42N-0.15C were manufactured by a VIM process under the nitrogen atmosphere. Regardless of kind of interstitial elements, tensile and yield strengths of annealed specimens were increased with increasing amount of interstitial elements . The deformed microstructures of HNS alloys were changed from planar dislocation glide, strain induced martensitic transformation and to deformation twinning at higher strain, whereas no deformation induced transformation was not observed in HIA alloys. The electrochemical polarization response in chloride solution revealed that simultaneous alloying of carbon and nitrogen enhanced pitting corrosion resistance, which was confirmed by galvanostatic reduction test, Mott-Schottky analysis and XPS measurement.
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