TWIN GROWTH IN DEEPLY UNDERCOOLED (NiFeCo)-B-Si-Nb ALLOY

Acta Metall Sin

1993, Vol. 29

Issue (9): 31-34 DOI:

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TWIN GROWTH IN DEEPLY UNDERCOOLED (NiFeCo)-B-Si-Nb ALLOY

ZHOU Genshu;YANG Gencang;ZHOU Yaohe Northwestern Polytechnical University; Xi'an

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ZHOU Genshu;YANG Gencang;ZHOU Yaohe Northwestern Polytechnical University; Xi'an. TWIN GROWTH IN DEEPLY UNDERCOOLED (NiFeCo)-B-Si-Nb ALLOY. Acta Metall Sin, 1993, 29(9): 31-34.

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Abstract Deep undercooling for Ni-base alloy, i.e., (Ni_(0.53)Fe_(0.33)Co_(0.14))_(73)B_(17)Si_8Nb_2, wasobtained by technique of auto-separating denucleation of molten glass. The solidification ofthe undercooled Ni-base alloy is observed to be in a mode of twin growth. Mechanism on theformation and growth of twins was approached by studies of composition, structure andmorphology of the alloy, together with the solidificatiion of deep undercooling alloy melt. Theundercooling, crystal lattice and composition of the alloy seem to be the most important fac-tors in the formation and growth of twins.

Key words: auto-separating denucleation undercooling twin growth Ni-base alloy

Received: 18 September 1993

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