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Mechanical Properties of an Fe‐Based SAM2×5‐630 Metallic Glass Matrix Composite with Tungsten Particle Additions
Author(s) -
Cheng IChung,
Kelly James P.,
Novitskaya Ekaterina,
Eliasson Veronica,
Hodge Andrea M.,
Graeve Olivia A.
Publication year - 2018
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201800023
Subject(s) - tungsten , materials science , nanoindentation , devitrification , weibull modulus , composite material , brittleness , amorphous metal , fracture toughness , phase (matter) , amorphous solid , modulus , composite number , toughness , particle (ecology) , metal matrix composite , metallurgy , flexural strength , crystallization , crystallography , chemistry , organic chemistry , alloy , oceanography , geology
We present the role of tungsten additions on the mechanical properties of a Fe‐based structural amorphous metal (SAM2×5‐630) containing crystalline tungsten. Matrix cracking by microindentation is inhibited by the addition of tungsten and indicates that tungsten improves the fracture toughness. Response surfaces from nanoindentation arrays indicate that the hardness and modulus of the matrix phase are increased by tungsten additions. Bulk composites with 30 vol% tungsten subjected to 4‐point flexure exhibited brittle fracture behavior and the characteristic strength and Weibull modulus were 165 and 8.7 MPa, respectively. The addition of tungsten did not cause devitrification of the matrix phase.