×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Gauge R&R on Vickers Hardness

Gauge R&R on Vickers Hardness

Gauge R&R on Vickers Hardness

(OP)
I'm not sure if it's feasible to perform Gauge R&R on Vickers hardness measurement. Could any one provide me some advice or guideline. Thank you.

Best regards,
ct

RE: Gauge R&R on Vickers Hardness

There has been considerable work on doing gauge R&R for the Rockwell hardness test.  An article in Advanced Materials and Processes provides a summary:

http://www.asminternational.org/Template.cfm?Section=ASMArchives&template=JournalAbstractDetail.cfm&AbstractID=7335

Also, NIST has a guide to the Rockwell test, NIST SP 960-5: Rockwell Hardness Measurement of Metallic Materials, that may provide some guidelines for you.  It is available at:

http://www.metallurgy.nist.gov/publications.html

Regards,

Cory

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

RE: Gauge R&R on Vickers Hardness

limct--do you mean vickers microhardness, or vickers macrohardness (i.e. Vickers 10Kg)?

RE: Gauge R&R on Vickers Hardness

(OP)
Thanks a lot Corypad.
Hi swall, I'm refering to Vickers microhardness 0.3kg.

Best regards,
ct

RE: Gauge R&R on Vickers Hardness

In my opinion, gage R&R on a microhardness tester is a waste of time.The links that CoryPad posted do a good of explaining the variability of Rockwell testing.With microhardness testing, variability is compounded by microstructural variations in the test sample,and the microhardness test block.Additional variation is introduced by the operator measuring the indentation diagonals.I have been down this gage R&R path many times by overzealous QC types that don't understand metallurgical characteristics and how we attempt to measure them.

RE: Gauge R&R on Vickers Hardness

I have heard anecdotal evidence that Brinell testing can show adequate gage R&R by using an optical measuring system such as the B.O.S.S system from Newage:

http://www.hardnesstesters.com/brinell-scanner.htm

I know that Instron (Wilson) and Clemex both offer automated image analysis for use with microhardness testing.  You would need to talk to them about gage R&R.  I recommend contacting Ed Tobolski at Instron for more information.  Use the following links for more information:

http://www.instron.com/software/autotest.asp

http://clemex.com/Products/MicroHardnessTesting/Automatic.aspx

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources