Some observations on the ambient temperature deformation behavior of fully lamellar Ti-46Al-2Nb-2Cr alloy

Journal Article · Fri Apr 01 04:00:00 EST 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90419-7· OSTI ID:5160661

Malakondaiah, G; Nicholas, T ^[1]; Kim, Y W ^[2]

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1. Wright Lab., Wright Patterson AFB, OH (United States)
2. UES, Dayton, OH (United States). Materials Research Div.

Titanium aluminide TiAl-based alloys have received considerable interest in recent years because of their potential as high temperature structural materials. Within a certain composition range these alloys can be heat-treated to exhibit two-phase microstructures, often referred to as fully lamellar, nearly lamellar or duplex depending on the relative components of lamellar colonies and equiaxed gamma grains. The fully and nearly fully lamellar microstructures have been found to exhibit relatively good fracture toughness at both ambient and elevated temperatures but poor tensile ductility even at temperatures as high as 800 C. On the other hand, duplex microstructures exhibit relatively low fracture toughness but moderate tensile ductility at ambient temperatures. Reported herein are some observations on the ambient temperature deformation behavior of a TiAl-based alloy in a fully lamellar microstructural condition.

• OSTI ID: 5160661
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 30:7; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
DATA
DEFORMATION
EXPERIMENTAL DATA
HEAT RESISTANT MATERIALS
INFORMATION
MATERIALS
NIOBIUM ALLOYS
NUMERICAL DATA
QUATERNARY ALLOY SYSTEMS
TITANIUM ALLOYS
TITANIUM BASE ALLOYS