Image icon  Dual-phase steel water quenched from 750°C

 
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Description: Dual phase steel annealed at 750°C for 5mins and then water quenched to room temperature. The microstructures revealed that the carbides are not dissolved at this low intercritical temperature and some undissolved pearlite lamallae can still be observed. Austenite is visible at grain boundaries and the martensite has been tinted by the application of second tint-etch. Martensite appears straw-coloured. Some M-A constituents can be clearly seen by the application of this step-etching technique.
Keywords: alloy • dual-phase steel • metal
Categories: Science approaches > Microstructure
Materials > Metals & alloys > Carbon steels
Processes > Thermal treatments > Annealing
Processes > Thermal treatments > Quenching
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
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
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Resource ID: 1764