EVALUATION OF LARGE TI-6AL-4V AND IMI 679 FORGINGS

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Abstract:

This report describes the evaluation of large, closed-die forgings of two titanium alloys. Four forgings each of Ti-6Al-4V and IMI 679 were used in the evaluation. Property tests that were conducted included tension, notched tension, compression. Tuckerman modulus, shear, bearing, fracture toughness and smooth and notched axial fatigue. Thermal exposure and susceptibility to delayed failure in salt water were also evaluated in each alloy. Static properties were generally slightly better in the Ti-6Al-4V alloy. However, the IMI 679 provided significantly better smooth and notched fatigue values. Both alloys had good fracture toughness at room temperature and at -110 deg F. Static and fatigue tests were conducted on one forging each of Ti-6Al-4V and IMI 679. The Ti-6Al-4V part gave the better static test performance. Both titanium alloys exhibited strengthweight efficiency superior to a 4340 steel part tested in a previous program.

Author(s):
Simenz, R. F. ; Macoritto, W. L.
Author Organization(s):
LOCKHEED-CALIFORNIA CO BURBANK
Descriptive Note:
Final rept. 1 Apr 1965-28 Feb 1966
Pagination:
0179

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFML-TR-66-57
Contract/Grant Number(s):
AF 33(615)-2690
Task Number(s):
738106
Project Number(s):
7381
Monitor Series:
TR-66-57, AFML
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*TITANIUM ALLOYS, YIELD POINT, CORROSION, MACHINING, LOADS(FORCES), DEFORMATION, TENSILE PROPERTIES, ELASTIC PROPERTIES, TOUGHNESS, BENDING, FRACTURE(MECHANICS), HEAT TREATMENT, FORGING, SHEAR STRESSES, FUSELAGES, JET FIGHTERS, ENVIRONMENTAL TESTS, FATIGUE(MECHANICS), DUCTILITY, FAILURE(MECHANICS), STATICS, SEA WATER, GRAIN STRUCTURES(METALLURGY), STRUCTURAL COMPONENTS, COMPRESSIVE PROPERTIES, HOT WORKING, TEMPERATURE, MECHANICAL PROPERTIES
Field(s)/Group(s):
Properties of Metals and Alloys
Keyword(s):
F 104 AIRCRAFT, TITANIUM ALLOY 679 IMI, TITANIUM ALLOY 6AL 4V, TITANIUM ALLOY 6AL 2SN 6V, TITANIUM ALLOY 3AL 11CR 13V
Report Date:
1966 Apr 01