Titanium Aluminides for Elevated Temperature Applications.

reportActive / Technical Report | Accession Number: ADB036437 | Need Help?

Abstract:

This report describes the results of a two part program studying 1 the effects of Al and Nb and quaternary additions in Ti3Al base alloys on ductility and strength, and 2 the potential for superplastic forming and diffusion bonding of Ti3Al-Nb type alloys. The results show that room temperature and elevated temperature ductility is decreased with increasing Al content in the composition range 28 to 40 at.pct.Al. As Nb content is increased from zero to 12 at.pct., ductility increases markedly up to 6 at.pct.Nb, followed by a lower rate of improvement beyond 6 at.pct.Nb. It was concluded that, in the composition range studied 28 to 40 at.pct.Al and 0 to 12 at.pct.Nb, an alloy composition of Ti-28Al-7Nb was optimum as regards room temperature ductility approximately 1.

Author(s):
Rhodes, C. G. ; Hamilton, C. H. ; Paton, N. E. ; Lange, F. F.
Author Organization(s):
ROCKWELL INTERNATIONAL THOUSAND OAKS CA SCIENCE CENTER
Descriptive Note:
Final rept. 1 Mar 77-1 May 78,
Pagination:
0124

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

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

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
SC5100.24FR, AFML-TR-78-130
Contract/Grant Number(s):
F33615-77-C-5079
Task Number(s):
P1
Project Number(s):
2306
Monitor Series:
TR-78-130
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*TITANIUM ALLOYS, *ALUMINUM ALLOYS, *MECHANICAL PROPERTIES, MICROSTRUCTURE, HIGH TEMPERATURE, MATERIAL FORMING, PLASTIC PROPERTIES, DIFFUSION BONDING, NIOBIUM ALLOYS, TERNARY COMPOUNDS, QUATERNARY COMPOUNDS, STRESS STRAIN RELATIONS, ISOTHERMS
Field(s)/Group(s):
Properties of Metals and Alloys, Mechanics
Keyword(s):
Titanium alloy 26Al 9Nb 1Cr, Titanium alloy 27Al 8Nb 2V
Report Date:
1978 Sep 01