EVALUATION OF LARGE TI-6AL-4V AND IMI 679 FORGINGS
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 strength/weight efficiency superior to a 4340 steel part tested in a previous program.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1966
- Accession Number
- AD0480704
Entities
People
- R. F. Simenz
- W. L. Macoritto
Organizations
- Lockheed Martin