Formation of split patterns of {gamma}{prime} precipitates in Ni-Al via particle aggregation

Journal Article · Fri Oct 08 04:00:00 EDT 1999 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(99)00223-7· OSTI ID:20000427

Banerjee, D; Banerjee, R; Wang, Y

The coarsening behavior of {gamma}{prime} precipitates, the primary strengthening phase in most Ni-Al based alloys, determines the important physical and mechanical properties of these alloys and therefore has been investigated both experimentally and through computer simulations. In this paper the authors focus on a different aspect concerning the formation of the split patterns in multi-particle systems: the interactions among the growing {gamma}{prime} precipitates during their growth and coarsening. Both two- and three-dimensional (3D) computer simulations were performed using a coherent phase field model which incorporates explicitly the coherency elastic strain and the four types of anti-phase domains (APDs) of the L1{sub 2} ordered {gamma}{prime} particles. An alternative mechanism has been suggested which shows that the interactions among the APDs during their growth and coarsening reproduce all the experimentally observed split patterns.

• Research Organization: Ohio State Univ., Columbus, OH (US)
• OSTI ID: 20000427
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 9 Vol. 41; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AGGLOMERATION
ALUMINIUM ALLOYS
COMPUTERIZED SIMULATION
GRAIN GROWTH
MICROSTRUCTURE
NICKEL ALLOYS
PRECIPITATION