_STP_466-1970_1984.pdf

IMPACT TESTING OF METALS A symposium presented at the Seventy-second Annual Meeting AMERICAN SOCIETY FOR TESTING AND MATERIALS Atlantic City,N.J.,22-27 June 1969 ASTM SPECIAL TECHNICAL PUBLICATION 466 ITI AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race Street,Philadelphia,Pa.19103 Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:47:03 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.()BY AMERICAN SOCIETY FOR TESTING AND IATERIALS 1970 Library of Congress Catalog Card Number:74-97731 ISBN 0-8031-0038-8 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Primed in York,Pa.March 1970 Second Priming,Batimore,Md.October 1984 Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:47:03 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword The papers in the Symposium on Impact Testing of.etals were given at the Seventy-second Annual 5Ieeting of the American Society for Testing and 5Iater als held in Atlantic City,N.J.,22-27 June 1969.The sponsors of this symposium were Committee E-1 on 5Iethods of Testing,Subcommittee 7 on Impact Testing,and Committee E-24 on Fracture Testing of 5Ietals.D.E.Driscoll,Army 5Iaterials and Me-chanics Research Center,presided as symposium chairman.Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:47:03 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publications Evaluation of Wear Testing,STP 446(1969)Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:47:03 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Introduction.1 The Role of Impact Testing in Characterizing the Toughness of Mate-rials-w.T.ATrHEWS.3 Effect of Strength and Thickness on Notch Ductility-J.m GROSS.21 Discussion.50 An Evaluation of the Charpy Impact Test-r HARSEM AND H.WINTERMARK 53 The Charpy Impact Test-Its Accuracy and Factors Affecting Test Results raN.H.FAHY.76 Discussion.89 Measurement of Fracture Toughness by Instrumented Impact Test-c.E.TURNER.93 Materials Sensitive to Slow Rates of Straining-c.E.HARrBOWER.113 Applications of the Instrumented Charpy Impact Test-R.A.WULLAERT.148 Influence of Inertial Load in Instrumental Impact Tests-s.VENZI,A.H.PRIEST AND M.J.MAY.165 Significance of the Drop-Weight Tear Test and Charpy V-Notch Impact Test Results-R.J.EIBER,A.DUFFY,AND G.M.MCCLURE.181 Investigation of Transition Temperature Tests for Line Pipe Materials-E.B.NORRIS AND R.D.WYLIE.192 Drop-Weight Tear Test-Effect of Variables on Test Results-T.G.HEBERLING AND G.E.SELBY.224 Dynamic Tear Energy-A Practical Performance Criterion for Fracture Resistance-E.A.LANGE AND F.J.LOSS.241 Dynamic Fracture Toughness Tests on A302-B Steel-A.J.BUSH.259 Correlations Between Ko and Charpy V-Notch Test Results in the Transi-tion-Temperature Range-J.M.RANSOM AND S.W.ROLFE.281 Development of a Pendulum-Type Dynamic Tear-Test Machine-w.F.FRANZ.303 General Discussion.314 Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:47:03 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.STP466-EB/Mar.1970 Introduction Since the last ASTM Symposium on Impact Testing in 1955,there has been considerable effort expended relative to the merits of impact testing,particularly with regard to the Charpy V-notch test.Yet,the Charpy test continues to play an important part in many materials specifications.To gain a clearer understanding of what an impact test tells us,many investigations have been conducted.These range from changing the configuration of the notch in the Charpy specimen to designing new specimens and tests for measuring toughness.In impact testing,for example,the most recent advances are in the areas of instrumentation of Charpy equipment and modification of specimen geometry.Both advances are aimed to provide a clearer under-standing of the impact test itself or to attempt to find meaningful cor-relations between the various fracture toughness criteria or both.Not to be overlooked are those efforts aimed at understanding the effects of test and specimen variables on the resultant test values.Coupled with these efforts have been modifications of the various tests or the imple-mentation of new tests,such as the dynamic tear(DT)test,which now finds considerable application in the pressure vessel field.Fracture tough-ness investigations have been the cause of considerable discussion since the 1955 symposium.Due to the interest and response to this years symposium,four ses-sions were required,and their classification best expresses the theme of the symposium.In t