John's email on EBSD is certainly useful (and a great example), as some of these things are definitely difficult to interpret with optical microscopy - and it is not always done well. However, those are often still the tools available to us right now, and a great deal faster than EBSD. Sadly, I have neither a confocal microscope or an SEM myself!
George Vander Voort and I are presenting a webinar covering preparation, etching and identification of microstructures in Carbon and Alloy steels with light optical microscopy. This is part of a series of webinars on the last Wednesday of each month - all on etching and microstructure identification for different material groups. We will have Q&A and follow up any questions raised in the webinar. I'm running these webinars because there are always a lot of questions about selection of etchants and microstructure identification!
Buehler Upcoming Webinar Sign up This article on the ASM website is some good reading also.
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Michael Keeble
Buehler a Division of ITW
Lake Bluff IL
(847) 393-3645
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Original Message:
Sent: 03-09-2021 11:44
From: Tomas Padron
Subject: Lower and Upper Bainite / Martensite / Retained Austenite - Metallographic Analysis
Hello,
I am working with low-carbon, low alloy steel samples in the quenched and tempered condition and would like to know your thoughts/recommendations on how I could prepare and examine the metallographic samples in order to be able to identify with certainty upper and lower bainite, retained austenite, un-tempered martensite, and tempered martensite microstructures...I have the possibility of using Light Optical Microscopy and SEM.
Thank you in advance for your valuable recommendations.
Tomas Padron