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How to Distinguish "Bainite Phase" from Pearlite Phase in Steel Microstructure?

11/17/2015 9:02 AM

I generally make mistakes in distinguishing "Bainite Phase" from "Pearlite Phase" in steel - microstructure when viewed under an optical microscope in the magnification range from 100X to 1000X. I wish to have some insight or tips which can help to distinguish between the two phases in steel-microstructure under an optical microscope.

Thanks

DDN VERMA

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#1

Re: How to distinguish "Bainite Phase" from Pearlite Phase in steel microstructure?

11/17/2015 9:09 AM

I thought (actually remember correctly) the difference weren't e that close, with a Pearlite looking more wormlike or waves while Bainite has a martensitic type structures, (Resembles needles).

Unless there isn't a high enough magnefications

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#2

Re: How to distinguish "Bainite Phase" from Pearlite Phase in steel microstructure?

11/17/2015 9:17 AM

Take a look at this:

Formation of Bainite

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#5
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Re: How to distinguish "Bainite Phase" from Pearlite Phase in steel microstructure?

11/18/2015 1:47 AM

Great explanation, well worth downloading for anyone interested.

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#3

Re: How to distinguish "Bainite Phase" from Pearlite Phase in steel microstructure?

11/17/2015 9:39 AM
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#4
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Re: How to distinguish "Bainite Phase" from Pearlite Phase in steel microstructure?

11/17/2015 11:47 AM

GA, that is the way we did it in Materials Lab experiments. "Hey what I see in the microscope sure looks like this picture in the reference book here etc...".

Perhaps try someone else's prepared sample, maybe they would polish and etch with different techniques that may enhance the microstructure visibility.

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