Strain at UTS

[Yoman]

The Duplex 25% has SMYS of 448MPa, UTS of 656MPa and Elongation of 25%.

If I like to plot the stress Vs strain curve with
Ramberg-os'good behaviour.

what strain will the UTS be? 25%?

Many Thanks

 

[CoryPad]

No, the UTS will be at less than 0.25 strain. It will be at a strain equal to the strain hardening exponent, n.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[metengr]

.....where you would need to plot log true stress and log true strain to determine n as CoryPad mentioned.