Corrosion and Nanomechanical Behaviors of 16.3Cr-0.22N-0.43C-1.73Mo Martensitic Stainless Steel

Rahul Ghosh; S. Chenna Krishna; A. Venugopal; P. Ramesh Narayanan; Abhay K. Jha; P. Ramkumar; P. V. Venkitakrishnan

doi:http://dx.doi.org/10.14773/cst.2016.15.6.281

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자료유형: 학술저널

저자정보: Rahul Ghosh (Vikram Sarabhai Space Centre (ISRO)) S. Chenna Krishna (Vikram Sarabhai Space Centre (ISRO) A. Venugopal (Vikram Sarabhai Space Centre (ISRO)) P. Ramesh Narayanan (Vikram Sarabhai Space Centre (ISRO)) Abhay K. Jha (Vikram Sarabhai Space Centre (ISRO)) P. Ramkumar (Vikram Sarabhai Space Centre (ISRO)) P. V. Venkitakrishnan (Vikram Sarabhai Space Centre (ISRO))

저널정보: 한국부식방식학회 Corrosion Science and Technology CORROSION SCIENCE AND TECHNOLOGY 제15권 제6호

발행연도: 2016.12

수록면: 281 - 289 (9page)

DOI: http://dx.doi.org/10.14773/cst.2016.15.6.281

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The effect of nitrogen on the electrochemical corrosion and nanomechanical behaviors of martensitic stainlesssteel was examined using potentiodynamic polarization and nanoindentation test methods. The results indicatethat partial replacement of carbon with nitrogen effectively improved the passivation and pitting corrosionresistance of conventional high-carbon and high- chromium martensitic steels. Post-test observation of thesamples after a potentiodynamic test revealed a severe pitting attacks in conventional martensitic steel comparedwith nitrogen- containing martensitic stainless steel. This was shown to be due to (i) microstructural refinementresults in retaining a high-chromium content in the matrix, and (ii) the presence of reversed austenite formedduring the tempering process. Since nitrogen addition also resulted in the formation of a Cr2N phase asa process of secondary hardening, the hardness of the nitrogen- containing steel is slightly higher thanthe conventional martensitic stainless steel under tempered conditions, even though the carbon content islowered. The added nitrogen also improved the wear resistance of the steel as the critical load (Lc2) isless, along with a lower scratch friction coefficient (SFC) when compared to conventional martensitic stainlesssteel such as AISI 440C.

#martensitic stainless steel #potentiodynamic polarization #impedance spectroscopy #pitting corrosion #nanomechanical

참고문헌 (19)

참고문헌 신청

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