Effect of boron addition on recrystallization and grain growth in Ni sub 3 Al polycrystals

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5778880

Zhou, B; Yu, S L; Chou, Y T ^[1]; Liu, C T ^[2]

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1. Lehigh Univ., Bethlehem, PA (USA). Dept. of Materials Science and Engineering
2. Oak Ridge National Lab., TN (USA)

The recrystallization and grain growth kinetics in pure and boron- doped Ni{sub 3}Al polycrystals were investigated in the temperature range from 850 to 1000 {degree}C. At 16.7% deformation, the recrystallization processes of the two sets of alloys were found to be similar in characteristics and magnitudes. Both alloys obey the classical Avrami equation. The activation energy of recrystallization for the boron-doped alloy was found to be 488 kJ/mol, which is slightly greater than the activation energy for the boron-free alloy, 476 kJ/mol. The grain growth kinetics obey the power relation with the time exponent less than 0.5, indicating a sluggish growth due to long-range ordering. 11 refs., 2 figs., 2 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA); Lehigh Univ., Bethlehem, PA (USA). Dept. of Materials Science and Engineering
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC05-84OR21400; FG02-86ER45256
• OSTI ID: 5778880
• Report Number(s): CONF-9106146-4; ON: DE91011966
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ACTIVATION ENERGY
ALLOYS
ALUMINIUM ALLOYS
BORON ADDITIONS
BORON ALLOYS
CRYSTAL STRUCTURE
ENERGY
GRAIN GROWTH
INTERMETALLIC COMPOUNDS
KINETICS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
NICKEL BASE ALLOYS
RECRYSTALLIZATION