Image icon  A medium carbon low alloyed structural steel

 
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Description: The steel sample was etched in 4% picral solution first and revealed the presence of pearlite and carbides distinctly. Further tint etching in SMB resulted in the straw coloured martensite to appear as a band. Retained austenite is appearing as very fine white particles. The bainite is appearing as bluish-black background between the martensite constituents. Coarse dark grains are pearlite. Microhardness measurements and SEM studies further proved the constituents identity. Conventional nital etching is not successful in delineating all the micro-constituents so distinctly.
Keywords: steel • retained austenite • low alloyed steel • structural steel • displacement • indentation • Plasticine
Categories: Science approaches > Microstructure
Materials > Metals & alloys > Alloy steels
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
Package: DoITPoMS Micrograph Library
Resource ID: 1771