DESIGN MECHANICAL PROPERTIES, FRACTURE TOUGHNESS, FATIGUE PROPERTIES, EXFOLIATION AND STRESS-CORROSION RESISTANCE OF 7050 SHEET, PLATE, HAND FORGINGS, DIE FORGINGS AND EXTRUSIONS

reportActive / Technical Report | Accession Number: ADA024609 | Open PDF

Abstract:

The mechanical properties, including fracture toughness and fatigue, fatigue-crack growth rates and corrosion characteristics have been determined for a total of 51 lots of 7050-T76 sheet, 7050-T73651 plate, 7050-T73652 hand forgings, 7050-T736 die forgings and 7050-T76511 extruded shapes. Tables of computed design mechanical properties, modulus of elasticity values and individual stress-strain curves are presented. The critical stress-intensity factor, K sub c, was determined for samples of each lot of sheet and the plane-strain stress-intensity factor, K sub Ic, was determined for plate, hand and die forgings and extruded shapes. The combination of strength and toughness of all products are generally comparable to or higher than those of conventional 7XXX alloys. Axial-stress fatigue strengths were determined in ambient-air and salt-fog environments. Modified Goodman diagrams were developed from tests made in ambient air.

Author(s):
Davies, R. E. ; Nordmark, G. E. ; Walsh, J. D.
Author Organization(s):
AIR TEST AND EVALUATION SQUADRON FIVE (NAVY) CHINA LAKE CA
Descriptive Note:
Final rept. 12 May 1972-12 Nov 1974
Supplementary Note:
See also report dated Apr 1973, AD-766 335.
Pagination:
0301

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Availability: Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
N00019-72-C-0512
Monitor Series:
NAVAIR
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_6.4.1_Secure Information Exchange; JCA_6_Net Centric; JCA_6.4_Information Assurance; JCA_1.2.5_Lessons Learned; JCA_1_Force Support
Modernization Areas:
Fully Networked C3; Quantum Science and Computing
Communities of Interest:
Air Platforms
Descriptor(s):
*ALUMINUM ALLOYS, STRESS STRAIN RELATIONS, MECHANICAL PROPERTIES, TENSILE PROPERTIES, ELASTIC PROPERTIES, COPPER ALLOYS, EXTRUSION, TOUGHNESS, FRACTURE(MECHANICS), FORGING, CRACK PROPAGATION, SHEETS, AIRFRAMES, FATIGUE(MECHANICS), METAL PLATES, STRESS CORROSION, MAGNESIUM ALLOYS, ZINC ALLOYS, EXFOLIATION
Field(s)/Group(s):
Properties of Metals and Alloys
Keyword(s):
ALUMINUM ALLOY 7050, FRACTURE TOUGHNESS, STRESS INTENSITY FACTOR
Report Date:
1975 Jul 01