Talk:Nanoindentation
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Not totally sure on what exactly happened with the companies, but the Nano indenter(tm) II was produced by Nano instruments, Inc, P.O. Box 14211 Knoxville, Tennessee 37914 and I seem to recall them being bought out by MTS which is why they now own the continuous stiffness system and their special lock in amplifier they use to drive said system.
Also note that you don't get "different" hardness values. Both indentation techniques (nano and macro) are the same basically, it's just that a typical macro intendation is calibrated to indent and back out the the hardness at the maximal load applied, whereas some of the nano systems use a method by which they can back out this same hardness value while performing the indentation.
It depends on how you calculate the indentation, whether you use a projected area or consider the elastic recovery. This could give you a different 'hardness'. Also, as microhardness values give Vickers hardness values, this can also give you a 'different' value, as the geometry/load will measure a different 'hardness'. - BenBritton —Preceding unsigned comment added by 129.67.84.73 (talk) 17:24, 2 November 2007 (UTC)
Nano Indenters
[edit]To answer previous post, the NanoIndenter II was produced by Nano Instruments in Oak Ridge. NANO instruments was bought by MTS in 1995 then sold to Agilent technologies in 2008. Their main product is the Nanoindenter XP. They are still considered the leader in NanoIndentation especially since they count Dr Warren Oliver (Oliver and Pharr model) in their staff. PMOREL
projected contact area for Martens hardness?
[edit]I think the use of the projected contact area for calculating the Martens hardness HM is not correct. According to ISO 14577 the area As must be used: HM = Pmax / As However, Ap is used for the Indentation hardness: H_IT = Pmax / Ap Dont mix up these two area and two hardness definitions! —Preceding unsigned comment added by 141.63.51.151 (talk) 07:21, 15 June 2010 (UTC)
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