Entrapment of disorder in drop-tube processed Ni[sub 3]Al

Journal Article · Tue Jun 01 00:00:00 EDT 1993 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(93)90483-9· OSTI ID:6584967

Sharma, S C; Herlach, D M ^[1]; Sinha, P P ^[2]

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1. Inst. for Space Simulation, Koeln (Germany)
2. Vikram Sarabhai Space Centre, Trivandrum (India)

As the highly ordered structure is primarily responsible for the room-temperature brittleness in Ni[sub 3]Al, recent experimental efforts have been addressed to the trapping of disorder during solidification of this intermetallic compound. In their kinetic model for complete disorder trapping, Boettinger and Aziz have predicted the formation of a metastable disordered phase beyond a critical value of the solidification velocity. However, as the order-disorder ([gamma][prime]-[gamma]) transformation temperature, T[sub c], in Ni[sub 3]Al is near the melting temperature, T[sub m] it is very difficult to entrap disorder during solidification of Ni[sub 3]Al. Here the authors report the trapping of partial disorder in the drop-tube processed Ni[sub 3]Al droplets as large as 400 [mu]m.

• OSTI ID: 6584967
• Journal Information: Scripta Metallurgica et Materialia; (United States), Vol. 28:11; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
ORDER-DISORDER TRANSFORMATIONS
NICKEL ALLOYS
AMBIENT TEMPERATURE
DUCTILITY
EXPERIMENTAL DATA
INTERMETALLIC COMPOUNDS
SOLIDIFICATION
TRANSITION TEMPERATURE
ALLOYS
DATA
INFORMATION
MECHANICAL PROPERTIES
NUMERICAL DATA
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
TENSILE PROPERTIES
THERMODYNAMIC PROPERTIES
360102* - Metals & Alloys- Structure & Phase Studies