The quasi-static, cyclic fatigue and final fracture behavior of a magnesium alloy metal-matrix composite

The quasi-static, cyclic fatigue and final fracture behavior of a magnesium alloy metal-matrix composite

In this paper the results of a study to understand the role of composite microstructure on quasi-static, cyclic fatigue, deformation and fracture behavior of magnesium alloy Z6 discontinuously reinforced with silicon carbide (SiC) particulates are presented. Quasi-static fracture of the composite wa...

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Bibliographic Details
Published in:Composites. Part B, Engineering Vol. 36; no. 3; pp. 209 - 222
Main Authors: Srivatsan, T.S., Al-Hajri, Meslet, Lam, P.C.
Format: Journal Article
Language:English
Published: Oxford Elsevier Ltd 01-01-2005
Elsevier
Subjects:
Applied sciences
Composite
Dispersion hardening metals
Exact sciences and technology
Fatigue
Fracture
Magnesium alloy
Metals. Metallurgy
Microstructure
Particulate reinforcement
Powder metallurgy. Composite materials
Production techniques
Temperature
Temperature
Composite
Magnesium alloy
Fatigue
Fracture
Particulate reinforcement
Microstructure
Temperature effect
Mechanical properties
Experimental study
Fatigue fracture
Composite material
Dispersion strengthened metal
Static load
Non oxide ceramics
Silicon carbide
Fatigue strength
Cyclic load
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Summary:In this paper the results of a study to understand the role of composite microstructure on quasi-static, cyclic fatigue, deformation and fracture behavior of magnesium alloy Z6 discontinuously reinforced with silicon carbide (SiC) particulates are presented. Quasi-static fracture of the composite was dominated by cracking of the reinforcing particulates present in the magnesium alloy metal matrix. Final fracture occurred as a result of crack propagation through the alloy matrix between particulate clusters. The composite specimens were cyclically deformed over a range of stress amplitudes. The stress amplitude–fatigue life response was found to degrade with an increase in test temperature. Influence of test temperature on quasi-static and cyclic response and final fracture behavior of the composite is discussed in light of the concurrent and mutually interactive influences of composite microstructural effects, deformation characteristics of constituents of the composite material, magnitude of cyclic stress amplitude and fatigue life.
ISSN:1359-8368
1879-1069
DOI:10.1016/j.compositesb.2004.09.004