Image icon  TRIP steel annealed at 775°C for 5 mins and then hold at 400°C for 150s for austenite stabilization

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Description: The steel microstructure reveals clearly the retained austenite as white, martensite as straw-coloured constituents, bainite can be identified with needle-shaped austenites (there is no carbide present due to the addition of Si). Many martensite-austenite constituents can be found in the microstructure which is revealed because of the tint etching. This is not possible with any other reported ethants/etching techniques for TRIP steels. The microstructure does not show presence of any carbides.
Keywords: alloy • bainite • metal • retained austenite • TRIP steel
Categories: Science approaches > Microstructure
Materials > Metals & alloys > Alloy steels
Processes > Thermal treatments > Annealing
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: Dr Amar K De, ASPPRC, Metallurgical and Materials Engineering Department, Colorado School of Mines
DoITPoMS, University of Cambridge
Published by: DoITPoMS, University of Cambridge
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Date created: 22 April 2003
Date added: 21 August 2009
Resource ID: 1768