Accession Number:

ADA064693

Title:

Ti/Al Design/Cost Trade-Off Analysis

Descriptive Note:

Final rept. 12 Sep 77-12 Mar 78

Corporate Author:

GENERAL ELECTRIC CO CINCINNATI OH AIRCRAFT ENGINE BUSINESS GROUP

Personal Author(s):

Report Date:

1978-10-01

Pagination or Media Count:

126.0

Abstract:

A new class of alloys based on intermetallic compounds in the titanium aluminum system has shown the potential for application in the temperature range of 1000-1700 F. This program was undertaken to investigate the type of application and payoff that would result. Two titanium aluminum alloys were looked at, the Ti3Al alpha two and TiAl gama. The use of Ti3Al was restricted to static components, whereas TiAl was limited to dynamic components. The dynamic application selected was a compressor and turbine blade. The static application was a mixing duct and exhaust duct liner. Cost of the selected titanium aluminides components was compared with the current cost of the nickel- base-superalloy components. The results show a cost increase for all the components. A detailed structural analysis of the four components shows the substitution would lead to longer life components. This substitution would result in not only a weight reduction in the engines, but a reduced fuel load and structure weight for a similar mission with the same bomb load, avionics, and other fixed equipment. An estimated 41.6 million dollars cost saving would result based on 240 aircraft for 20 years. Author

Subject Categories:

  • Metallurgy and Metallography
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE