Lamellar-structure titanium-aluminum based alloy having a beta-gamma phase

US20150322549A1Inactive Publication Date: 2015-11-12KOREA INST OF MASCH & MATERIALS
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Patent Information

Authority / Receiving Office
US ยท United States
Current Assignee / Owner
KOREA INST OF MASCH & MATERIALS
Publication Date
2015-11-12
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

A lamellar titanium-aluminium (TiAl) alloy having a beta-gamma phase according to the present invention contains aluminum (Al) of 40หœ46 at %, niobium (Nb) of 3หœ6 at %, a creep resistance enhancer of 0.2หœ0.4 at %, a softening resistance enhancer of 2 at %, and the balance of titanium (Ti) and is manufactured by vacuum arc melting.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a lamellar titanium-aluminum (TiAl) based alloy having a beta-gamma phase, and more particularly, to a lamellar titanium-aluminum (TiAl) alloy having a beta-gamma phase of which the effect of stabilizing a beta phase is improved and the manufacturing cost is reduced, by adding tungsten (W) and chromium (Cr) that are not expensive instead of molybdenum (Mo) and vanadium (V) that are usually added to stabilize a beta phase.

[0003] The present invention relates to a lamellar titanium-aluminum (TiAl) alloy having a beta-gamma phase of which mechanical properties are improved by adding a small amount of carbon (C) and silicon (Si) that are effective in grain refinement and creep resistance to suppress production of a deposit and of which high-temperature oxidation resistance and ductility are improved by adding niobium (Nb).

[0004] 2. Description of the Related Art

[0005] A titanium-aluminum (TiAl)...

Claims

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