_STP_608-1976.pdf

RECENT DEVELOPMENTS IN:MECHANICAL TESTING A symposium presented at the Seventy-eighth Annual Meeting AMERICAN SOCIETY FOR TESTING AND MATERIALS Montreal,Canada,22-27 June 1975 ASTM SPECIAL TECHNICAL PUBLICATION 608 A.K.Schmieder,symposium chairman List price$14.50 04-608000-23#AMERICAN SOCIETY FOR TESTING AND/AATERIALS 1916 Race Street,Philadelphia,Pa.19103)k Copyright by ASTM Intl(all rights reserved);Sun Dec 27 13:09:23 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.by AMERICAN SOCIETY FOR TESTING AND MATERIALS 1976 Library of Congress Catalog Card Number:76-11471 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Printed in Lutherville-Timonium,Md.Sept.1976 Copyright by ASTM Intl(all rights reserved);Sun Dec 27 13:09:23 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword The symposium on Recent Developments in Mechanical Testing was presented at the Seventy-eighth Annual Meeting of the American Society for Testing and Materials held in Montreal,Canada,22-27 June 1975.Committee E-28 on Mechanical Testing sponsored the symposium.A.K.Schmieder,General Electric Company,presided as symposium chairman.Copyright by ASTM Intl(all rights reserved);Sun Dec 27 13:09:23 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publications Instrumented Impact Testing,STP 563(1974),$21.75,04-563000-23 Evaluation of Wear Testing,STP 446(1969),$7.75,04-446000-23 Copyright by ASTM Intl(all rights reserved);Sun Dec 27 13:09:23 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.A Note of Appreciation to Reviewers This publication is made possible by the authors and,also,the un-heralded efforts of the reviewers.This body of technical experts whose dedication,sacrifice of time and effort,and collective wisdom in review-ing the papers must be acknowledged.The quality level of ASTM publica-tions is a direct function of their respected opinions.On behalf of ASTM we acknowledge with appreciation their contribution.ASTM Committee on Publications Copyright by ASTM Intl(all rights reserved);Sun Dec 27 13:09:23 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Editorial Staff Jane B.Wheeler,Managing Editor Helen M.Hoersch,Associate Editor Charlotte E.DeFranco,Senior Assistant Editor Ellen J.McGlinchey,Assistant Editor Copyright by ASTM Intl(all rights reserved);Sun Dec 27 13:09:23 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Introduction 1 Evaluating Engineering Alloys in CompressionR.CHAIT AND C.H.CURLL 3 Loading and Specimen Considerations for Homogeneous Deformation 4 Lubricants to Minimize End Effects 6 Other Techniques Investigated to Minimize End Effects 9 Recommendations and Closing Comments 12 Rational Basis and New Methods for Proportional Limit,Machine Stiffness,Critical Stress Intensity,and Crack Velocity MeasurementsR.B.CLOUGH 20 Tensile Machine Kinetics in System Prior to Tightening and Alignment 22 Tensile Machine Kinetics in a System Which is Aligned and Tightened 23 Determination of Proportional Limit 24 Proportional Limit Under Multiaxial Stress 26 Stiffness of Constant Crosshead Velocity Machines 28 Stiffness of Constant Load Rate Machines 30 Stiffness of Constant Strain Rate Machines 31 Machine Stiffness Effects on Load-Cycling Rate Sensitivity of the Stress 33 Crack Motion 35 Variability of Machine Stiffness 40 Conclusion 40 Discussion 42 Results of a Round Robin Test Program on Hardness Conversion of Ferritic Stainless SteelsT.G.HEBERLING 45 Round Robin Test Procedure 46 Results 47 Conclusions 52 Subsequent ASTM Actions 53 Static Mean Stress and Cyclic Yield StrengthG.F.WEISSMANN AND J.A.DAVIS 55 WT-Bend Tester 55 Test Results 61 Summary and Conclusions 65 Use and Reproducibility of a Gage to Measure the Lateral Expansion of Charpy V-Notch Impact Specimensj.M.HOLT 67 Lateral Expansion Gage 68 Copyright by ASTM Intl(all rights reserved);Sun Dec 27 13:09:23 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Materials and Experimental Work 71 Results and Discusaon 75 Summary and Concluaons 88 Detomination of Plastic or Creep Stnuns by GridsM.I.MANJOINE 91 Procedure 92 Experimental Work 97 Discussion 100 Conclusion 104 Stress Relaxation in Bendingp.PARIKH AND E.SHAPIRO 106 Test Procedure 106 Results and Discussion 109 Conclusions 112 Comparison of Nfaranl to Automatic Unloading Dur