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CIPM-CCM Working Group on Hardness

XIX IMEKO World Congress 2009 - Lisbon, Portugal. TC5 - Meeting. CIPM-CCM Working Group on Hardness. Alessandro Germak - Chairman. CIPM-CCM, Working Group on Hardness. History:

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CIPM-CCM Working Group on Hardness

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  1. XIX IMEKO World Congress 2009 - Lisbon, Portugal TC5 - Meeting CIPM-CCM Working Group on Hardness Alessandro Germak - Chairman

  2. CIPM-CCM, Working Group on Hardness History: • in 1995 the 20th General Conference of Weight and Measure resolved to ensure the world-wide traceability by international comparison of metrology standards; • in 1997 at the 86th Session of the CIPM, an had-hoc working group on hardness was proposed (following the Italian proposal) to consider international comparisons of hardness standards; TC5 Meeting - XIX IMEKO World Congress - September 611, 2009, Lisbon

  3. CIPM-CCM, Working Group on Hardness History: • in June 1998 at NIST the proposal was approved in the fist meeting of the ad-hoc working group; • in 1999 the group became full working group of the Consultative Committee for Mass and Related Quantities (CCM). TC5 Meeting - XIX IMEKO World Congress - September 611, 2009, Lisbon 3

  4. CIPM-CCM, Working Group on Hardness Motivations: • conventional quantity based on testing methods defined by a combination of physical quantities expressed in SI units; • hardness standards are established and maintained in most of NMIs; • traceability to the standard of NMIs is demanded in industry and elsewhere. TC5 Meeting - XIX IMEKO World Congress - September 611, 2009, Lisbon 4

  5. CIPM-CCM, Working Group on Hardness Liansons: • IMEKO TC5 (scientific); • ISO and OIML (standardization). TC5 Meeting - XIX IMEKO World Congress - September 611, 2009, Lisbon 5

  6. CIPM-CCM, Working Group on Hardness Meetings: 1°) 1998 - NIST – Gaithersburg – USA 2°) 1999 - BIPM – Sèvres – France 3°) 2000 - Technical University (IMEKO) – Vienna – Austria 4°) 2001 - IMGC/INRIM (ISO) – Torino – Italy 5°) 2002 - INMETRO (ISO) – Xerém– Brazil 6°) 2004 - NIST (HARDMEKO) – Gaithersburg – USA 7°) 2005 - NPL (ISO) – Teddington – United Kingdom 8°) 2006 - Rio Hotel (IMEKO) – Rio de Janeiro – Brazil 9°) 2007 - AIST (HARDMEKO) – Tsukuba – Japan 10°) 2008 - MPA (ISO) – Hannover – Germany 11°) 2009 - AIST (ISO) – Tsukuba – Japan (Sept. 2009) TC5 Meeting - XIX IMEKO World Congress - September 611, 2009, Lisbon 6

  7. CIPM-CCM, Working Group on Hardness Key Comparison data-base (KCDB) for the Mutual Recognition Arrangement (MRA) TC5 Meeting - XIX IMEKO World Congress - September 611, 2009, Lisbon 7

  8. CIPM-CCM, Working Group on Hardness Ongoing comparisons: • Rockwell C KC (worldwide – link among 4 sub-regional comparisons); • Pilot study on diamond indenters (foreseen about 10 participants). TC5 Meeting - XIX IMEKO World Congress - September 611, 2009, Lisbon 8

  9. CIPM-CCM, Working Group on Hardness International level International comparisons International definitions ? Primary hardness standard machines Direct calibration National level ISO Standards – Part 3 Calibration laboratory level Primary hardness reference blocks Hardness calibration machines Direct calibration ISO Standards – Part 2 Hardness reference blocks Hardness testing machines Direct calibration User level ISO Standards – Part 1 Reliable hardness values Guidelines on the Estimation of Uncertainty in Hardness Measurements EURAMET/cg-16/v.01 (Previously EA-10/16) Traceability chain in hardness measurements TC5 Meeting - XIX IMEKO World Congress - September 611, 2009, Lisbon 9

  10. CIPM-CCM, Working Group on Hardness Main test parameters F0 Preliminary Force F Total Test Force Ta Application time of preliminary test force Tpm Duration time of preliminary test force Tdp Preload Dwell Time Tp Total time of preliminary test force Taa Additional load Application Time Tdf Duration of the total force Tra Additional load Removal Time Trf Final reading time Va Approach Velocity Vap Preload Application Velocity Viaa Initial Velocity of Additional load HRC testing cycle analysis TC5 Meeting - XIX IMEKO World Congress - September 611, 2009, Lisbon 10

  11. CIPM-CCM, Working Group on Hardness HRC INTERNATIONAL DEFINITION TC5 Meeting - XIX IMEKO World Congress - September 611, 2009, Lisbon 11

  12. CIPM-CCM, Working Group on Hardness HRC Uncertainty – Sensitivity Coefficients TC5 Meeting - XIX IMEKO World Congress - September 611, 2009, Lisbon 12

  13. CIPM-CCM, Working Group on Hardness Next steps: • Verification of the application of the new definition by means of a KC of HRC scales maintained at MNIs • New definitions for other HR, HV and HB sclaes (HK?) • KCs in others scales TC5 Meeting - XIX IMEKO World Congress - September 611, 2009, Lisbon

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