Date of Award
1991
Document Type
Thesis
Publication Status
Version of Record
Submission Date
October 2026
Thesis/Dissertation Advisor [Chair]
Salivar, Gary C.
Abstract
The deformation and fatigue crack growth behavior of amorphous metals are presented. A discussion of magnetic domains, and their influence on magnetostriction is also included. Testing of Metglas 2605SC, utilizing magnetostriction to generate DeltaK, indicated near-threshold (Region I) fatigue crack growth behavior for as-cast and annealed specimens. A Delta Kth on the order of 0.6-1.0 kg/mm^3/2 was also indicated. The best crack growth rate behavior was obtained for transverse field-annealed specimens. Significant variability in the data, however, prevented a determination of Delta Kth for this condition. A life prediction model based on a Paris equation was developed. Crack growth data were consistently lower than predicted by the Region II model, which would be expected for near-threshold data. Fractographic analyses supported the influence of domains on crack growth behavior. The scatter in the Region I data appears to be contributed by the effects of domains and domain walls.
Extent
85 p.
Recommended Citation
Willard, Alan Eugene, "Deformation and fatigue crack growth of iron(81) boron(13.5) silicon(3.5) carbon(2) amorphous metal using magnetostrictive behavior to generate delta K" (1991). Electronic Theses and Dissertations 1990 - 1999. 162.
https://digitalcommons.fau.edu/etd_general_4/162
Identifier
FADT14736
Comments
College of Engineering and Computer Science|FAU Electronic Theses and Dissertations Collection|Thesis (M.S.)--Florida Atlantic University, 1991.|College of Engineering and Computer Science