|About this Abstract
||Materials Science & Technology 2012
||In-situ Characterization of Phase Transformations in Materials
||Application of High-Energy Synchrotron Radiation for Investigating the Phase Transformation in Hot-Rolled TRIP-Aided Steels
||Piyada Suwanpinij, Andreas Stark, Xiaoxiao Li, Frank Römer, Klaus Herrmann, Thomas Lippmann, Wolfgang Bleck
|On-Site Speaker (Planned)
The phase transformation of a hot rolled TRIP steel is investigated by means of high energy X-ray diffraction induced by the high energy synchrotron beam of 100 keV. The retained austenite plays the most important role in controlling the mechanical properties in TRIP steels. It is formed during the carbon enrichment in austenite during the formation of carbide-free bainite. The samples are deformed and annealed according to the hot rolling process in a dilatometer,through which the X-ray diffracts and reveals the phase fraction and the carbon content in the remaining austenite. It is advantageous that the retained austenite can be measured without sample preparation, which usually results in unwanted martensite transformation. Additionally, the carbon content is measured also ex-situ by FEG EPMA.