What is relation between vicker's hardness (HV) and yield strength (Ys) of metal foams ?

19 April 2016 1 4K Report

I want to know the relation between HV and Ys for metal foams. I have read in research articles that Ys = HV/3.

How much acceptable is it ? what about bulk metal?

Hi Bashker,

The exact relationship is Flow stress = 3 * VHN. However flow stress is defined as the stress at the "representative strain". In strain hardening materials, this representative strain is higher than the strain that would correspond to YS. Therefore, if you multiply VHN by 3, you overestimate YS.

I hope this helps.

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