Grain refinement in undercooled metals

Conference · Thu Dec 31 00:00:00 EST 1998

OSTI ID:323433

Xiao, J Z; Yang, H; Kui, H W ^[1]

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1. Chinese Univ. of Hong Kong, Shatin (Hong Kong). Physics Dept.

Recently, it was demonstrated that grain refinement in metals can take place through two mechanisms, namely, dynamic nucleation and remelting of initially formed dendrites. In this study, it was found that Ni{sub 99.45}B{sub 0.55} undergoes grain refinement, both by dynamic nucleation or by remelting, depending on the initial bulk undercooling just before crystallization. The nature of the grain refinement process is confirmed by microstructural analysis of the undercooled specimens.

• OSTI ID: 323433
• Report Number(s): CONF-971201-; TRN: IM9911%%46
• Resource Relation: Conference: 1997 fall meeting of the Materials Research Society, Boston, MA (United States), 1-5 Dec 1997; Other Information: PBD: 1998; Related Information: Is Part Of Phase transformations and systems driven far from equilibrium; Ma, E. [ed.] [Louisiana State Univ., Baton Rouge, LA (United States)]; Atzmon, M. [ed.] [Univ. of Michigan, Ann Arbor, MI (United States)]; Bellon, P. [ed.] [Univ. of Illinois, Urbana, IL (United States)]; Trivedi, R. [ed.] [Ames Lab., IA (United States)]|[Iowa State Univ., Ames, IA (United States)]; PB: 703 p.; Materials Research Society symposium proceedings, Volume 481
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
GRAIN REFINEMENT
NICKEL
BORON ADDITIONS
LIQUID METALS
NUCLEATION
DENDRITES
GRAIN SIZE
TEMPERATURE DEPENDENCE
DATA