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Licensed Unlicensed Requires Authentication Published by De Gruyter June 3, 2019

On the material characteristics of a high carbon cast austenitic stainless steel after solution annealing followed by quenching in a CNT nanofluid

Sadegh Pour-Ali, Ali-Reza Kiani-Rashid, Abolfazl Babakhani, Sannakaisa Virtanen, Nhat Truong Nguyen, Seyedsina Hejazi, Ali Davoodi, Afshin Nazarnejatizadeh and Hashem Teimourinejad


Solution annealing followed by quenching in carbon nanotubes (QCNT) nanofluid treatment was applied to generate very high interstitial carbon content,≈0.30 wt.%, in an austenitic stainless steel (ASS). The high interstitial carbon content leads to remarkable improvement in mechanical properties with essentially no loss of ductility, with no chromium carbides and/or martensite formation. To evaluate the localized corrosion tendency and passivity behavior, 3.5 wt.% NaCl and borate buffer solutions were used, respectively. Based on the electrochemical corrosion results, both high carbon and low carbon (0.030 wt.%) QCNT-treated ASS alloys show comparable passivity and localized corrosion performance. In addition, Mott–Schottky plots revealed that the anodic films on QCNT-treated samples exhibit similar semiconducting characters.

Correspondence address, Ali-Reza Kiani-Rashid, Materials and Metallurgical Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, 91775-1111, Iran, Tel: +98 513 8817182, Fax: +98 513 8807182, E-mail: , Web:


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Received: 2018-10-04
Accepted: 2019-01-22
Published Online: 2019-06-03
Published in Print: 2019-06-12

© 2019, Carl Hanser Verlag, München

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