Fractal fracture of amorphous Fe46Ni32V2Si14B6 alloy

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)244-248
Journal / PublicationJournal of Non-Crystalline Solids
Volume224
Issue number3
Publication statusPublished - Apr 1998

Abstract

The effects of structure relaxation temperature (TR) on the fracture toughness (TR) of amorphous Fe46Ni32V2Si14B6 alloy ribbon have been measured. The value of K1c is approximately constant at 8 MPa m1/2 when TR <200°C, but it decreases to 2 MPa m1/2 if TR increases from 200°C to 350°C. Associated with the decrease of fracture toughness, the topography of the fractured crack profile transforms from irregular (or fractal) to smooth (or Euclidean). Fractal dimensions (D) of the fracture profiles have also been determined by the perpendicular sectioning method. The results illustrated that, under quasi-two-dimensional brittle fracture conditions, K1c was approximately a linear function of √D * , the square root of the fractal dimension increment. Based on experimental data, the characteristic length, a0, was calculated and is about 20 nm, which is in agreement with the precipitation cluster size of a FeNiB based amorphous alloy which has undergone structure relaxation. © 1998 Elsevier Science B.V.

Citation Format(s)

Fractal fracture of amorphous Fe46Ni32V2Si14B6 alloy. / Shek, C. H.; Lin, G. M.; Lee, K. L.; Lai, J. K L.

In: Journal of Non-Crystalline Solids, Vol. 224, No. 3, 04.1998, p. 244-248.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review