Peculiarities of deformation-induced amorphization in CoZrNi alloys

Novikova, E.E.; Tatyanin, Ye.V.; Kurdjumo, V.G.

doi:10.1016/0956-716x(95)00259-x

Cited by 9 publications

(1 citation statement)

References 8 publications

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“…However, of particular significance is the finding that the amorphous phase commonly nucleates at the various defect sites, e.g. microband [9], twin and lattice dislocations [10,11] and grain boundary (GB) [11]. It turns out to be a general rule that either the high defect concentration or dislocation activity plays a crucial role in SSA.…”

Section: Introductionmentioning

confidence: 99%

Localized solid-state amorphization at grain boundaries in a nanocrystalline Al solid solution subjected to surface mechanical attrition

Tao

Hong

et al. 2005

J. Phys. D: Appl. Phys.

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Using high-resolution electron microscopy, localized solid-state amorphization (SSA) was observed in a nanocrystalline (NC) Al solid solution (weight per cent 4.2 Cu, 0.3 Mn, the rest being Al) subjected to a surface mechanical attrition treatment. It was found that the deformation-induced SSA may occur at the grain boundary (GB) where either the high density dislocations or dislocation complexes are present. It is suggested that lattice instability due to elastic distortion within the dislocation core region plays a significant role in the initiation of the localized SSA at defective sites. Meanwhile, the GB of severely deformed NC grains exhibits a continuously varying atomic structure in such a way that while most of the GB is ordered but reveals corrugated configurations, localized amorphization may occur along the same GB.

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