How do you find Vickers Hardness from stress strain curve?
Hi, Forgive me if I give you information you are already aware of. The stress-strain curve will give you a good description of many of the mechanical properties of a material. And specific numerical values for the the young’s modulus, ultimate tensile strength and yield strength. However the exact Vicker’s hardness can’t be read directly from a stress-strain curve. Qualitively we can assume the greater the stiffer the material ( ie higher young’s modulus and steeper gradient) we would expect a denser and therefore harder material. As you have correctly stated there are empirical formulas which link the strength to the hardness. Here are a couple I have to hand: #Steel: Ultimate Strength= 0.495 Brinell Hardness [kpsi] #Cast Iron: Ultimate Strength= 0.23 Brinell Hardness -12.5 [kpsi] #Aluminium: Ultimate Strength= 0.2375 Brinell Hardness -16 [kpsi] Forgive me for using psi and the brinell hardness scale as it is what I have at hand. Furthermore, it would be possible read the link between
