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Metals 2017, 7(7), 271; doi:10.3390/met7070271

In-Situ Investigation of Strain-Induced Martensitic Transformation Kinetics in an Austenitic Stainless Steel by Inductive Measurements

1
Materalia Research Group, Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC), Av. Gregorio del Amo 8, 28040 Madrid, Spain
2
Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands
3
Philips Advanced Technology Centre, P.O. Box 20100, Tussendiepen 4, 9200 CA Drachten, The Netherlands
4
Department of Nonlinear Solid Mechanics, University of Twente, Drienerlolaan 5, 7522 NB Enschede, The Netherlands
5
Faculty of Science and Engineering, Advanced Production Engineering—Engineering and Technology Institute Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
*
Author to whom correspondence should be addressed.
Received: 31 May 2017 / Revised: 10 July 2017 / Accepted: 12 July 2017 / Published: 13 July 2017
(This article belongs to the Special Issue Bainite and Martensite: Developments and Challenges)
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Abstract

An inductive sensor developed by Philips ATC has been used to study in-situ the austenite (γ) to martensite (α′) phase transformation kinetics during tensile testing in an AISI 301 austenitic stainless steel. A correlation between the sensor output signal and the volume fraction of α′-martensite has been found by comparing the results to the ex-situ characterization by magnetization measurements, light optical microscopy, and X-ray diffraction. The sensor has allowed for the observation of the stepwise transformation behavior, a not-well-understood phenomena that takes place in large regions of the bulk material and that so far had only been observed by synchrotron X-ray diffraction. View Full-Text
Keywords: stainless steel; metastable austenite; strain-induced martensite; transformation kinetics; inductive measurements stainless steel; metastable austenite; strain-induced martensite; transformation kinetics; inductive measurements
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Celada-Casero, C.; Kooiker, H.; Groen, M.; Post, J.; San-Martin, D. In-Situ Investigation of Strain-Induced Martensitic Transformation Kinetics in an Austenitic Stainless Steel by Inductive Measurements. Metals 2017, 7, 271.

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