Image icon  TRIP steel annealed at 775°C for 5 mins and then hold at 400°C for 40s for austenite stabilization

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Description: The microstructure shows martensite (straw-coloured), retained austenite (white) and some M-A constituents. Martensite volume fraction is higher than the steel which was hold for 150s at 400°C and cooled. Since the austenite is low in C-content for such a low holding time at 400°C, most of the austenite is transformed to martensite during cooling from 400°C to room temperature.
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: DoITPoMS, University of Cambridge
Dr Amar K De, ASPPRC, Metallurgical and Materials Engineering Department, Colorado School of Mines
Published by: DoITPoMS, University of Cambridge
License: This resource is released under the Creative Commons Attribution Non-Commercial Share Alike license (2.0 UK: England & Wales).
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Date created: 22 April 2003
Date added: 21 August 2009
Resource ID: 1769