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1 AD-753 709 ENGINEERING DESIGN DATA FOR ALUMINUMALLOY 7475 IN THE T761 AND T61 CONDITIONR ussell R. CervayDayton UniversityPrepared for:Air Force Materials LaboratorySeptember 1972 DISTRIBUTED BY: National Technical Information ServiceU. S. DEPARTMENT OF COMMERCE5285 Port Royal Road, Springfield Va. 22151 AFML-TR-72-1 73 ENGINEERING DESIGN DATA FOR ALUMINUMALLOY 7475 IN THE T761 AND T61 CONDITIONR USSE-LL 4 YUNIVY-,RSITY OF DAY)TONRLESA RCI N'NSj7zlUTEIt(HN\ICAL. REIPORT AFMIL-TR-72- 173St-TIT-tNIIIE 19%'ApF~oved kw puib~c rz~caw-: disuibutionualim NAL TFCHNICALINFORMATION SERVICEAIR PORCF. %tATrhRIAIS L,\11 ORATORYAIR FORCE SYSI EMS CO)MMAND)WRIGHT-PAI-ThSON AIR FOR(T R~AME 01410r~NOTICESWhen Government drawings, specifications, or other data are any purpose other than in connection with a definitely related Governmentprocurement operation, the United States Government thereby incurs noresponsibility nor any obligation whatsoever.

2 And the fact that the Governmentmay have formulated, furnished, or in any way supplied the said drawings,specifications, or other data, is not to be regarded by implication or other-wise as in any manner licensing the holder or any other person orcorporation, or conveying any rights or permission to manufacture, use,or sell any patented invention that may in any way be related of this report should not be returned unless otherwise requiredby security considerations. contrartual obligations, or notice on aspecial I&1 4r S l t N 1 Vtf l97Z 300 ENGINEERING DESIGN DATA FOR ALUMINUMALLOY 7475 IN THE T761 AND T61 CONDITIONRUSSELL R. CER VA YApproved for public release; distribution report was prepared by the University of Dayton ResearchInstitute (UDRI), Dayton, Ohio.

3 The work was performed under USAFC ontract No. F33615-71-C-l054. The contract wai Initiated underProject No. 7361, "Materials Applications," Task No. 738106, "Engi-neering and Design Data, " and adminisitered by the Air Force MaterialsLaboratory, Wright-Patterson Air Force Base, Ohio, Mr. David , AFML/LAE, Project (or many) of the items crmpared in this report were commercialitems that were not developed or manufactured to meet Governmentspecifications, to withstand the tests to which they were subjected, or tooperate as applied during this study. Any failure to meet the objectivesof this study is no reflection on any of the commercial items discussedherein or on any author would like to acknowledge that testing performed for thisprogram was accomplished by Messrs.

4 Cambron, Eblin, and Maxwell ofthe report covers work conducted from April 1971 to February 's report number if report was submitted by the author in April Technical report has been reviewed and is OLEVITCHC hief, Materials Engineering BranchMaterials Support DivisioniiTABLE OF CONTENTSS ection PageI INTRODUCTION 1II PROGRAM OUTLINE AND PROCEDURES 2 III RESULTS AND DISCUSSION 7IV CONCLUSIONS 18V REFERENCES 19 Preceding page blank ,4 Unclas sifiedSecurity ClassificationDOCUMENT CONTROL R&DUniversity of Dayton Research Institute UnclassifiedSEOT76 ANTITLONITO4 OEscRIPTIVEt NOTES rfvm. of , a" Inclusive states) Technical ReportSr AUTPNO(S) (Lastname. host name. inostal)Cervay. Russell REPORT? DATE 70. -VOTAS. No. COo PAGE5 76 No. or mapsSeptember 1972 .1r<'~80.

5 COMIUAC? ON GRANT NO. 94. ORIMATgNa-6~ REPORT NUMBER(S)F33615-71-C-1054S, PROJECT me. 6. Z1NH= PORTt NO(S) (Any todo.' door maybe. assigsedTask No. 738106 is LT-7-7t0 AVA ILAUILITY/LIUSTATION NOTICESA pproved for public release;distrlbutlon is 12. SPONSORNIG MILITARY ACTIVIT~YAir Force Materials LaboratoryAir Force Systems Command_____Wright-Patterson AFB. Ohio 4543313 AGSTRACTT ensile, exfoliation, fatigue, and fatigue crack growth propertieswere determined for a new aluminum sheet alloy, 7475, in two heat treatedconditions.' T761 and T61. The tensile properties of the T61 sheet weresuperior to those for the T761 sheet. The fatigue crack growth propertieswere the same from heat treatment to heat treatment and were unaffectedby crack orientation in the plate.)

6 Conventional notched and unnotchedfatigue data showed in the 7475 alloy had superior fatigue resistancecompared to presently-in-'use aluminum alloys. The exfoliaticii propertiesof the T761 sheet were slightly superior to Ishose of the T61 heat ClassificationSecurity Classificain-14 KYWR5 LINK A LINK a LINK C_____ OLK WT 141 OLERog, vAluminumTensileExfoliationFatigueCrack GrowthDesign DataINSTRUCTIONSI. ORIGINATING ACTIVITY: Enter the name and address imposed by security classification. using standard statementsof the co~ntractor, subcontractor. grantee, Department of De. such as:fense activity or other organization (corporate author) issuing (1) "Qualified requestera may obtain copies of thisthe report. report from DDC."2a. REPORT SECURITY CLASSIFICATION: Enter the over- (2) "Foreign announcement and dissermination of thisalt security clanaification of the report.

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