_STP_432-1968.pdf

APPLICATIONS RELATED PHENOMENA IN TITANIUM ALLOYS A symposium presented at a meeting of Committee B-10 on Reactive&Refractory Metals and Alloys AMERICAN SOCIETY FOR TESTING AND MATERIALS Los Angeles,Calif.,18-19 April,1967 ASTM SPECIAL TECHNICAL PUBLICATION NO.432 List price$20.00;30 per cent discount to members published by the AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race Street,Philadelphia,Pa.19103 ()BY AMERICAN SOCIETY FOR TESTING AND MATERIALS 1968 Library of Congress Catalog Card Number:68-18768 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Printed in Baltimore,Md.March,1968 Foreword The Symposium on Applications Related Phenomena in Titanium Alloys was presented 18-19 April 1967 in Los Angeles,Calif.ASTM Committee B-10 on Reactive and Refractory Metals and Alloys spon-sored the symposium.Hans Conrad,University of Kentucky,was the symposium chairman.It was divided into four sessions,and presiding as chairmen of these sessions were Dr.Conrad;R.I.Jaffee,Battelle Memorial Institute;H.P.Kessler,Reactive Metals,Inc.;and W.W.Minkler,Titanium Metals Corporation of America.Related ASTM Publications New Structural Materials for Aerospace Vehicles,STP 379(1965),$6.00 Stress-Corrosion Cracking of Titanium,STP 397(1966),$14.00 Structural Fatigue in Aircraft,STP 404(1966),$18.50 Plain Strain Crack Toughness Testing of High Strength Metallic Materials,STP 410(1967),$5.50 Contents Introduction.1 Fracture Toughness and Notch Strength Source of Fracture Toughness:The Relation Between Klc and the Or-dinary Tensile Properties of Metals-c.T.HAHN AND A.R.ROSENFIELD.5 A Review of Factors Influencing the Crack Tolerance of Titanium Alloys-J.L.SHANNON,JR.,AND W.F.BROWN,JR.33 Structural Ductility of High Strength Titanium Alloys-RALPH PAPIRNO.64 Toughness of Two-Phase 6A1-4V Titanium Microstructures-w.w.GERBERICH AND G.S.BAKER.80 Relation of Strength and Toughness to Fine Structures in a Beta Ti-tanium Alloy-B.R.BANERJEE,J.J.HAUSER,AND J.M.CAPENOS.100 Plane Strain Fracture Toughness and Mechanical Properties of 5A1-2.5Sn ELI and Commercial Titanium Alloys at Room and Cryogenic Temperatures-c.M.CARMAN AND J.M.KATLIN.124 Fracture Toughness in Aqueous Saline Environments Metallurgical and Mechanical Aspects of the Sea-Water Stress Corro-sion of Titanium-I.R.LANE AND J.L.CAVALLARO.147 The Influence of Composition and Heat Treatment on the Aqueous-Stress Corrosion of Titanium-s.R.SEAGLE,R.R.SEELEY,AND G.S.HALL.170 Effects of Heat Treating Environmental Conditions on the Stress-Corro-sion Cracking Resistance of Several Titanium Alloys-o.G.HOWE AND R.GOODE.189 Environmental Related Phenomena The Initiation of Hot-Salt Stress Corrosion Cracking of Titanium A1-loys-s.P.RIDEOUT.205 Crevice Corrosion of Titanium-J.D.JACKSON AND W.K.BOYD.218 Biaxial Properties of Titanium Alloys at Cryogenic Temperatures-s.F.FREDERICK AND D.L.CORN.227 Texture Strengthening and Fracture Toughness of Titanium Alloy Sheet at Room and Cryogenic Temperatures-T.L.SULLIVAN.236 Low Cycle Fatigue and Wear Effects of a 3.5 Per Cent Sodium Chloride Aqueous Saline Environ-ment on the Fatigue Crack Propagation Characteristics of Titanium Alloys-T.W.CROOKER AND E.A.LANCE.251 Lubricants and Wear Coatings for Titanium-s.j.KOSTMAN.268 Surface Treatment of Ti-6A1-4V for Impact-Fatigue and Wear Resist-ance-R.D.WELTZIN AND G.KOVES.283 STP432-EB/Mar.1968 Introduction The use of titanium alloys in aerospace and other systems has experi-enced a rapid increase in the past several years.This increased applica-tion has revealed that titanium alloys exhibit certain behavior charac-teristics which can lead to serious consequences if not given proper consideration.Some of the more important phenomena related to these characteristics are fracture toughness,stress-corrosion(aqueous and hot salt),crevice corrosion,hydrogen effects,low-cycle fatigue,and wear.These are the topics covered in this volume.Recognizing the importance of keeping the engineer informed on re-search under way on such problems,the joint ASTM-ASME Committee on Effect of Temperature on the Properties of Metals sponsored a sym-posium on Stress Corrosion Cracking in Titanium Alloys at the Fall Meeting of the ASTM in Seattle,Washington,on 1 and 2,Nov.,1965.The success of this meeting prompted the sponsoring committee to rec-ommend a follow-up symposium to be held within one to two years on related subjects in titanium alloys.ASTM Committee B-10,at its regular meeting on 3,Nov.,1965,acted on this recommendation and offered to sponsor such a symposium,since titanium alloys are within its scope.It was subsequently decided to cover a broad range of applications re-lated phenomena rather than limit the symposium to stress-corrosion.This broader subject matter,therefore,was taken as the theme for the present symposium.Most of the papers presented at the symposium are found in this volume.They represent both survey papers by invited speakers and sub-mitted