The general effect of atomic size misfit on glass formation in conventional and high-entropy alloys
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Pages (from-to) | 30-41 |
Journal / Publication | Intermetallics |
Volume | 78 |
Publication status | Published - 1 Nov 2016 |
Link(s)
Abstract
It is a longstanding notion that atomic size misfit plays an important role with regard to glass formation in multi-component alloys. In the previous studies, this atomic size effect was commonly modeled as an “inclusion-in-matrix” problem and glass formation was usually linked to a threshold volume strain in “matrix” or solvent atoms. However, it becomes difficult to directly apply this approach to high entropy alloys, which are in lack of a clear distinction between solvent and solute atoms. With the simple geometric model we recently developed, here we show that glass formation in over two hundred glass-forming alloys, including conventional and high-entropy alloys, can be correlated with the excessive fluctuation in the intrinsic residual strains that result from the atomic size misfit. This interesting behavior suggests that, in most glass-forming multicomponent alloys hitherto reported, the atomic size effect acts with the chemistry effect to promote glass formation. Furthermore, our findings also imply that glass formation in multi-component alloys, regardless of their compositional complexity, may be rationalized with the Lindamann's criterion that was long established for the instability of crystalline lattices.
Research Area(s)
- Glass forming ability, High-entropy alloys, Metallic glasses
Citation Format(s)
The general effect of atomic size misfit on glass formation in conventional and high-entropy alloys. / Ye, Y. F.; Liu, X. D.; Wang, S.; Liu, C. T.; Yang, Y.
In: Intermetallics, Vol. 78, 01.11.2016, p. 30-41.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review