HV 0.05 hardness conversion
HV 0.05 hardness conversion
(OP)
Is there a direct link between the value for HV 0.05 microhardness to the yield limit?
What can you say about the capacity in surface stress normal to the surface? No sliding...
What can you say about the capacity in surface stress normal to the surface? No sliding...





RE: HV 0.05 hardness conversion
Sometimes the specimens will be too small to conduct the tensile test, so we often do hardness to estimate their mechanical property, fasteners especially.
Vickers hardness and tensile test all test the capacity of resisting to outer force.
So these is link with yield strength and hardness, I think.
RE: HV 0.05 hardness conversion
http://www.welding-advisers.com/
RE: HV 0.05 hardness conversion
Yes, you probably can not or should not correlate microhardness to macro strength, because the reason Goahead said and the indentation size effect (ISE) which means the smaller indentation, the bigger hardness read.
RE: HV 0.05 hardness conversion
RE: HV 0.05 hardness conversion
I don't know if I explained it very well, but I hope you know what I mean.
Summary; Is the part tougher to normal forces than a regular part in AISI 4140? How much can you say the surface can be loaded?
RE: HV 0.05 hardness conversion
RE: HV 0.05 hardness conversion
Regards,
Cory
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: HV 0.05 hardness conversion
RE: HV 0.05 hardness conversion
RE: HV 0.05 hardness conversion
Roughly there are two formula to correlate hardness and ultimate tensile strength,
hardness = 3* strength //watch out the unit
or strength in psi = 500* brinell number
RE: HV 0.05 hardness conversion
And I think it is coming from theoretical upper bound method or slip line method if I am not mistaken.
RE: HV 0.05 hardness conversion
Regards,
Cory
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.