In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 22, No. 12 ( 2007-12), p. 3303-3308
Abstract:
Tension and stress-relaxation behaviors of a La 62 Al 14 Cu 11.7 Ag 2.3 Ni 5 Co 5 bulk metallic glass (BMG) as a function of isothermal annealing time have been investigated. It is found that annealing at 373 K below the glass-transition temperature (423 K) of the BMG alloy causes an increase of special heat difference at the glass transition and density of the alloy, indicating a reduction of free volume in the BMG alloy with annealing time. Compared with the as-cast sample, the fracture strength, Vickers hardness, viscosity, Young’s modulus, and stress-relaxation stability of the annealed BMGs increase with annealing time, which is caused by the reduction of free volume in the annealed samples. Furthermore, a change of fracture morphology from a mixture of smooth and furrow zones in the as-cast sample to a mainly furrow zone in the sample annealed for 8 h was also observed. All samples exhibit brittle behavior during tension tests.
Type of Medium:
Online Resource
ISSN:
0884-2914
,
2044-5326
DOI:
10.1557/JMR.2007.0425
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2007
detail.hit.zdb_id:
54876-5
detail.hit.zdb_id:
2015297-8
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