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Martensite in Steel

Sanjay Kulkarni03-08-2021 11:14

What is the correct way to call Martensite in steel? Is it un-tempered Martensite? Or martensite onl...

Joshua Jackson03-09-2021 01:10

Hi Sanjay, Great question! Untempered martensite is what you get just after quenching. It leaves a...

Sanjay Kulkarni03-09-2021 08:44

Hi Joshua, Thanks for quick response, so the question remains is should I call it un-tempered mart...

Andrea Talamini Minotto03-09-2021 08:54

Usualyy, for as-quenced microstructure I use "untemperd martensite" or "tetragonal martensite". R...

Sanjay Kulkarni03-10-2021 10:00

Thanks Andrea. I should designate un-tempered martensite instead of martensite. Clarifies my co...

Nnaemeka Ugodilinwa03-09-2021 09:27

Untempered martensite should be the right term in your report to distinguish it from tempered mar...

John Shingledecker03-10-2021 09:43

I would concur if you have untempered martensite to report it as such. In the power industries ...

Sanjay Kulkarni03-10-2021 10:04

Thank you very much John. I am following your advice. Regards, ------------------------------ ...

Sanjay Kulkarni03-10-2021 10:02

Thanks Nnaemeka. I appreciate you taking time in replying my question. I will take your advice. ...

Larry Hanke03-10-2021 13:35

Sanjay: The term that you should use in your report depends on your interpretation and understand...

Sanjay Kulkarni03-12-2021 09:06

Thanks Larry. I will refer the book Light Microscopy of Carbon Steels. Side discussion: It is e...

Nihad Ben Salah03-10-2021 12:06

Hi Sanjay, When you have to name Martensite it is linked to the heat treatment that the steel has ...

Sanjay Kulkarni03-12-2021 09:17

Hello Nihad. The points you have made in you advice is true. I am not confused. I get those issu...

John Grubb03-13-2021 12:20

In some high alloy steels, the stress relief that accompanies tempering allows some retained a...

Sanjay Kulkarni03-15-2021 09:48

Hello John, Thank you very much for the information. I have seen un-tempered martensite (in ban...

John Grubb03-15-2021 13:51

I cannot say what is retained austenite or fresh (untempered) martensite in your micro. My b...

Robert Cryderman03-16-2021 08:59

The microstructure you show appears to be plate type martensite in retained austenite which i...

Sanjay Kulkarni03-17-2021 09:17

Hi Robert, Thank you very much for the advice and valuable paper that I can use as a referen...

Nihad Ben Salah03-17-2021 10:04

Hi Sanjay, It is very unsual to see un-tempered martensite embedded in the core of normalized ...

Nassos Lazaridis03-09-2021 17:20

Sanjay: Immediately after quenching, martensite is untempered, but untempered martensite is usu...

Sanjay Kulkarni03-10-2021 10:18

Thank you very much Nassos. I greatly appreciate it. Thanks to all of you for the advice and shar...

Neil Kilpatrick03-10-2021 14:18

It is particularly useful to include key variants of untempered martensite, depending on the circum...

Sanjay Kulkarni03-12-2021 08:46

Thanks for your advice Neil. Mostly we use 5160H, 9250 and low carbon boron steels. These grades a...

Bruce Boardman03-11-2021 10:56

While I can't confirm this, I would expect that George Krauss' book "Steels: Processing, Structure,...

Sanjay Kulkarni03-12-2021 08:37

Hello Bruce, I will definitely check it out. Thanks a lot for valuable advice. Regards, ---------...

Reza Abbaschian03-18-2021 01:22

Hi Sanjay, Residual stresses can also influence martensite transformation, and mechanically induced...

John Jerry Spray12-21-2021 08:32

Sanjay, It is traditional in the metallurgy literature to call untempered martensite fresh martens...