Accession Number:

ADA550832

Title:

The Duality of Fracture Behavior in a Ca-Based Bulk-Metallic Glass (Preprint)

Descriptive Note:

Journal article (preprint)

Corporate Author:

TENNESSEE UNIV KNOXVILLE DEPT OF MATERIALS SCIENCE AND ENGINEERING

Report Date:

2011-07-01

Pagination or Media Count:

15.0

Abstract:

Ca65Mg15Zn20 bulk-metallic glass BMG exhibited a typical brittle fracture behavior during compressive loading at room temperature. Samples exploded into many small pieces after elastic deformation, and no macroscopic plasticity was observed. The fracture surface demonstrated multiple fracture patterns, including typical metallic-glass vein patterns and glass mirror, mist, and hackle patterns. These observations show that Ca-based BMGs are subjected to multiple brittle fracture modes under compressive loading. Periodic nanoscale corrugations were found in the hackle region, which may indicate local plasticity for the brittle fracture.

Subject Categories:

  • Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE