Environmental effect on room-temperature ductility of isothermally forged TiAl-base alloys

Journal Article · Mon Jan 31 23:00:00 EST 1994 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

DOI:https://doi.org/10.1007/BF02647977· OSTI ID:5227754

Nakamura, Morihiko; Hashimoto, Kenki ^[1]; Itoh, Naoyuki ^[2]; Tsujimoto, Tokuzo ^[3]; Suzuki, Toshiyuki ^[4]

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1. National Research Inst. for Metals, Tokyo (Japan)
2. Nippon Steel Corp., Chiba (Japan)
3. Ibaraki Univ. (Japan). Faculty of Engineering
4. Kougakuin Univ., Tokyo (Japan)

Isothermally forged TiAl-base alloy (Al-rich, Mn-containing, and Cr-containing TiAl) were heat-treated in various conditions, and equiaxed grain structures consisting of [gamma] and [alpha][sub 2] or [beta] phases were obtained. The heat-treated alloys were tensile tested in vacuum and air at room temperature, and the environmental effect on tensile elongation was studied. The ductility of the alloys consisting of equiaxed [gamma] grains and a large amount of [alpha][sub 2] grains was not largely affecting by laboratory air, and a decrease in the amount of [alpha][sub 2] grains resulted in a large reduction of ductility in air. The [beta] phase in the Cr-containing alloy improved the ductility in vacuum, but it resulted in a large reduction of ductility in air.

• OSTI ID: 5227754
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Journal Name: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States) Vol. 25:2; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
DATA
DUCTILITY
EXPERIMENTAL DATA
INFORMATION
INTERMETALLIC COMPOUNDS
MANGANESE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NUMERICAL DATA
TENSILE PROPERTIES
TITANIUM ALLOYS