Investigation of the Properties of Titanium-Carbon Hybrid Alloys.

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Abstract:

The effects of 6 aluminum additions on the compressive properties and microhardness of titanium-titanium carbide composites were investigated. Composites containing 40-50 TiC by volume were produced using standard casting procedures from the melt. Enhanced strength of Ti-TiC composites at room temperature and elevated temperatures upon Al additions was found. Strengthening mechanism was also studied. The tensile properties of Ti-TiC composites was most sensitive to the size and distribution of TiC particles. Tensile properties with different TiC size which was controlled by cooling rate during melting were studied. Results show that 50 improvement of ultimate tensile strength could be achieved by microstructure refinement. Titanium-base alloys are a potential candidate for space applications because of their light weight, high specific modulus, high specific strength, and good corrosion resistance. The TiC system reinforced metal-matrix composites were produced by traditional ingot metallurgy. The use of this metallurgical method has been developed in an attempt to improve mechanical properties through the presence of a ductile metal matrix. Good strength and ductility have been achieved in compression.

Author(s):
Chin, Bryan A. ; Zee, Ralph H.
Author Organization(s):
AUBURN UNIV AL
Descriptive Note:
Final rept. Dec 87-Apr 91,
Pagination:
0078

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFOSR-TR-91-0654
Contract/Grant Number(s):
AFOSR-88-0036
Task Number(s):
A2
Project Number(s):
2306
Monitor Series:
TR-91-0654, AFOSR
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
ALLOYS, BASE METAL, CASTING, CASTINGS, COMPOSITE MATERIALS, COMPRESSIVE PROPERTIES, CONTROL, COOLING, CORROSION RESISTANCE, DUCTILITY, HIGH STRENGTH, HIGH TEMPERATURE, LIGHTWEIGHT, MATRIX MATERIALS, MECHANICAL PROPERTIES, METALLURGY, METALS, MICROHARDNESS, MICROSTRUCTURE, PARTICLES, RATES, REFINING, REINFORCING MATERIALS, ROOM TEMPERATURE, SPACE TECHNOLOGY, TENSILE PROPERTIES, TENSILE STRENGTH, TITANIUM ALLOYS
Field(s)/Group(s):
Laminates and Composite Materials, Properties of Metals and Alloys, Fabrication Metallurgy
Keyword(s):
*Metal matrix composites, *Ceramic materials, High temperature, Microhardness, *Titanium carbides, Strength(Mechanics), *Titanium, Space based, Casting, WUAFOSR2306A2, PE61102F
Report Date:
1991 Jun 15