_STP_467-1970.pdf

ACHIEVEMENT OF HIGH FATIGUE RESISTANCE IN METALS AND ALLOYS 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 467 List price$28.75 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race Street,Philadelphia,Pa.19103 Copyright by ASTM Intl(all rights reserved);Mon Dec 21 10:58:06 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.(BY AMERICAN SOCIETY FOR TESTING AND MATERIALS 1970 Library of Congress Catalog Card Number:74-101591 lSaN 0-8031-0062-1 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication Printed in Baltimore,Md,September 1970 Copyright by ASTM Intl(all rights reserved);Mon Dec 21 10:58:06 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword The Symposium on Achievement of High Fatigue Resistance in Metals and Alloys was given at the Seventy-second Annual Meeting of ASTM held in Altantic City,N.J.,22-27 June 1969.ASTM Committee E-9 on Fatigue,Subcommittee I on Research sponsored the symposium,which was held in three sessions:Parameters Important to High Fatigue Resistance,H.F.Hardrath,National Aeronautics and Space Administration,chairman of Session I;Mechanisms for Achieving High Fatigue Resistance,J.C.Gross-kreutz,chairman of Session II;and Processes for Achieving High Fatigue Resistance,C.E.Feltner,Ford Motor Co.,chairman of Session IIl.J.C Grosskreutz and C.E.Feltner presided as symposium cochairmen.Copyright by ASTM Intl(all rights reserved);Mon Dec 21 10:58:06 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publications Structural Fatigue in Aircraft,STP 404(1966),$18.50 Plane Strain Crack Toughness Testing of High-Strength Metallic Materials,STP 410(1967),$5.so Electron Fractography,STP 436(1968),$11.00 Fatigue at High Temperature,STP 459(1969),$11.25 Copyright by ASTM Intl(all rights reserved);Mon Dec 21 10:58:06 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Introduction 1 Parameters Important to High Fatigue Resistance The Resistance of Metals to Cyclic Deformation-R.w.LANDGRAF 3 Crack Initiation at Stress Concentrations as Influenced by Prior Local Plas-ticity-J.H.CREWS,JR.37 Discussion 50 The Deformation and Fracture of a Ductile Metal Under Superimposed Cyclic and Monotonic Strain-L.F.COFFIN,JR.53 Mechanisms for Achieving High Fatigue Resistance Strengthening Mechanisms in Fatigue-c.E.FELINER AND P.BEARDMORE 77 The Fatigue Strength of Nickel-Base Superalloys-M.GELL)G.a.LEVERANT,AND C.n.WELLS 113 Optimum Fatigue Crack Resistance-J.F.THROOP AND G.A.MILLER 154 Thermomechanical Processing and Fatigue of Aluminum Alloys-F.G.OSTERMANN AND W.H.REIMANN 169 Discussion 187 Processes for Achieving High Fatigue Resistance Surface Treatments for Fatigue Strengthening-D.K.BENSON 188 Fatigue Life Improvement Through Stress Coining Methods-E.R.SPEAKMAN 209 Discussion 226 The Role of Residual Stresses in Increasing Long-Life Fatigue Strength of Notched Machine Members-D.v.NELSON,R.E.R1CKLEFS,AND W.P.EVANS 228 Discussion 252 Metal Fatigue with Elevated Temperature Rest Periods-B.I.SANDOR 254 Discussion 275 Improvement in the Fatigue Strength of Notched Bars by Compressive Self-Stresses-T.L.GERBER AND H.O.FUCHS 276 Copyright by ASTM Intl(all rights reserved);Mon Dec 21 10:58:06 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Introduction STP467-EB/Sep.1970 This symposium recognizes that,while every design engineer strives to prevent fatigue failures,he must,at the same time try to achieve the highest possible fatigue resistance at a minimum cost and often at a minimum weight and space.Reaching this goal requires an acute knowledge of those phenom-enological parameters which best characterize fatigue resistance and those processes by which the fatigue resistance of existing materials can be im-proved.Furthermore,his future choice of new and improved materials may be determined by the extent to which materials researchers are able to evolve and apply knowledge about those micromechanisms which control fatigue resistance.It is,therefore,the purpose of this symposium to present up-to-date views on those parameters,mechanisms,and processes that are important in achiev-ing high fatigue resistance in materials.J.C.Grosskreutz Midwest Research Institute,Kansas City,Mo.64110;C.E.Fehner Ford Motor Co.,Dearborn,Mich.48121;symposium cochairmen.Copyright*1970 by ASTM International www.astm.org Copyright by ASTM Intl(all rights reserved);Mon Dec 2