Establish Manufacturing Methods for Closed Die Aluminum Forgings with Improved Stress Corrosion Resistance

reportActive / Technical Report | Accession Number: AD0863247 | Open PDF

Abstract:

To evaluate SCC susceptibility as it relates to forging processing, a 7079 aluminum alloy landing gear outer cylinder was produced using five different forging techniques. Three of these techniques formed the part with a solid barrel using differing preliminary open die working. The other two techniques involved forward and backward extrusion. Standard uniaxial-tensile testing revealed no significant difference between the various forging techniques. However, alternate immersion stress corrosion testing in 3 12 NaC1 indicated differences in stress corrosion cracking susceptibility. The two extruded forgings forward and back were significantly more resistant to SCC. The forward extruded parts were somewhat more resistant to SCC than the back extruded parts, but were also substantially more expensive to produce.

Author(s):
Morris, Charles A. ; Cerrone, Anthony G.
Author Organization(s):
WYMAN-GORDON CO WORCESTER MA
Descriptive Note:
Final rept. 1 Oct 1966-1 Sep 1969
Supplementary Note:
DOI: 10.21236/AD0863247
Pagination:
0259

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFML-TR-69-264
Contract/Grant Number(s):
F33615-67-C-1040
Project Number(s):
AF-9-126
Monitor Series:
TR-69-264, AFML
 Subject Terms
Joint Capability Areas:
JCA_8_Building Partnerships; JCA_8.2_Shape; JCA_8.2.4_Leverage Capacities and Capabilities of Security Establishments; JCA_3_Force Application; JCA_8.1_Communicate; JCA_3.2_Engagement; JCA_3.2.1_Kinetic Means; JCA_6.4.1_Secure Information Exchange; JCA_5_Command and Control; JCA_3.1.3_Maneuver to Influence; JCA_3.1_Maneuver; JCA_5.3_Planning; JCA_8.1.1_Inform Domestic and Foreign Audiences; JCA_8.1.3_Influence Adversary and Competitor Audiences; JCA_8.2.1_Partner with Governments and Institutions; JCA_8.2.2_Provide Aid to Foreign Partners and Institutions; JCA_8.2.3_Build the Capabilities and Capacities of Partners and Institutions; JCA_8.2.5_Strengthen Global Defense Posture; JCA_6.4_Information Assurance; JCA_6_Net Centric
Communities of Interest:
Air Platforms
Descriptor(s):
*ALUMINUM ALLOYS, *FORGING, *LANDING GEAR, CRACKS, FRACTURE(MECHANICS), DIES, CORROSION RESISTANCE, STRESS CORROSION, MAGNESIUM ALLOYS, ZINC ALLOYS
Field(s)/Group(s):
Aircraft, Fabrication Metallurgy
Keyword(s):
*CLOSED DIE FORGING, ALUMINUM ALLOY 7079
Report Date:
1969 Sep 01