Hi people. Wich is the methodology to measure the hardness variation from ambient temperature to high temperature?
I know diagrams about it, but I dont know how is possible to draw this?
There is an equipment dedicated for measuring hardness at the elevated temperatures.
Here you have some more information:
https://www.bruker.com/fileadmin/user_upload/8-PDF-Docs/SurfaceAnalysis/TMT/Webinars/Hardness_Testing_at_Elevated_Temperatures.pdf
Dear Daniel, this question is interesting and not think there is a single answer, since hardness varies depending on phase formation between components of the test sample and the test temperature. I think in Volume 4 of Metal Handbook, for your particular alloy could you find a first approximation
Yes. I agree with Mr.Pagnola. Metals hand book will be of some use
A.V.Sethuraman
There are some nanaoindentation appartus that can measure surface hardnes till upto 1000°C.
To directly answer your question, hot hardness testers have been developed to measure hardness of materials at elevated temperatures. There are a variety of hot hardness tests available, as mentioned above, Bruker has one (we have an older Marshall unit), some are home made. As a caution, diamond indenters have problems at high temperatures and sapphire is often used instead.
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