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

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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.

Author(s):
Wang, Gongyao ; Liaw, Peter K. ; Senkov, Oleg N. ; Miracle, Daniel B.
Author Organization(s):
TENNESSEE UNIV KNOXVILLE DEPT OF MATERIALS SCIENCE AND ENGINEERING
Descriptive Note:
Journal article (preprint)
Supplementary Note:
Prepared in cooperation with UES Inc., Dayton, OH and Air Force Research Lab., Wright-Patterson AFB, OH. Journal article submitted to the Metallurgical and Materials Transactions A.
Pagination:
0015

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFRL-RX-WP-TP-2011-4293
Task Number(s):
20
Project Number(s):
4347
Monitor Series:
TP-2011-4293, AFRL-RX-WP
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_1_Force Support; JCA_1.2_Force Preparation; JCA_1.2.7_Experimentation; JCA_1.2.3_Educating; JCA_5.3_Planning; JCA_5.3.2_Apply Situational Understanding; JCA_6_Net Centric; JCA_8_Building Partnerships
Communities of Interest:
Biomedical
Descriptor(s):
*BRITTLENESS, *COMPRESSIVE PROPERTIES, *GLASS, BEHAVIOR, DEFORMATION, ELASTIC PROPERTIES, FRACTURE(MECHANICS), MIRRORS, MIST, PATTERNS, PLASTIC PROPERTIES, REGIONS, REPRINTS, SAMPLING, SURFACES, TEMPERATURE
Field(s)/Group(s):
Ceramics, Refractories and Glass
Keyword(s):
BMG(BULK METALLIC GLASS), PE62102F
Report Date:
2011 Jul 01
Creation Date:
2011 Nov 17