ductileûbrittle transition temperature

[aust1]

Hi,

Materials is not my area of expertise so I have a question:

Say we have two specimens of A36 steel. The first has a ductile–brittle transition temperature of -20 degrees celcius and the second -10 degrees celcius.

Does this suggest that the first specimen will have a higher toughness at higher temps, say above 0 degrees celcius?

Thanks

 

[cloa]

In general you can't say that a material that has a lower DBTT is going to be necessarily tougher at higher temperatures.



Look how complicated the relationship is between steel variables and DBTT and toughness- you aren't going to get a standard relationship.

http://www.sut.ac.th/engineering/metal/pdf/MechMet/14_Brittle fracture and impact testing.pdf

http://www.eng-tips.com/threadminder.cfm?pid=1529

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