In-situ investigation of strain-induced martensitic transformation kinetics in an austenitic stainless steel by inductive measurements
C. Alonso de Celada Casero (Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC), TU Delft - (OLD) MSE-3)
Harm Kooiker (Philips Advanced Technology Centre, University of Twente)
Manso Groen (Philips Advanced Technology Centre)
J Post (Rijksuniversiteit Groningen, Philips Advanced Technology Centre)
D. San Martin (Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC))
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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.
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