Title

Effect of ceramic nanoparticle reinforcements on the quasistatic and dynamic mechanical properties of magnesium-based metal matrix composites

Authors

Authors

J. H. Shen; W. H. Yin; Q. M. Wei; Y. L. Li; J. L. Liu;L. N. An

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

J. Mater. Res.

Keywords

LOW-TEMPERATURE SUPERPLASTICITY; SEVERE PLASTIC-DEFORMATION; SIC; NANOPARTICLES; GRAIN-REFINEMENT; CARBON NANOTUBES; SINGLE CRYSTALS; NONBASAL SLIP; MG ALLOY; ULTRASONIC METHOD; ROOM-TEMPERATURE; Materials Science, Multidisciplinary

Abstract

We have investigated the microstructure, the quasistatic and high-rate mechanical properties of magnesium (Mg)-based metal-matrix composites (MMCs) reinforced with nanoparticles, also termed as metal-matrix nanocomposites (MMNCs), in this case reinforced with nanoparticles of beta-phase silicon carbide (beta-SiC) the volume fraction ranging from 5 to 15 vol%. The yield and the ultimate strength increase with reinforcement volume fraction up to 10 vol% nanoparticles. MMCs with micrometer-sized SiC particles have higher yield strength than their MMNC counterparts, whereas the ultimate strength shows the opposing trend, suggesting greater strain hardening in the MMNCs. Transmission electron microscopy shows that the average interparticle distance decreases with increasing SiC vol%. Recrystallization was reported as completed during sintering at 575 degrees C [R.D. Doherty et al., Mater. Sci. Eng. A, 238, 219 (1997)], but dislocations might be generated due to thermal expansion mismatch of Mg/SiC during cooling. The majority of Mg-grains below 20 nm remain around the nanoparticles. As such a reverse volume fraction effect takes place in 15 vol% nanoparticle-reinforced MMNCs, which off sets the strengthening advantage induced by the nanoparticles.

Journal Title

Journal of Materials Research

Volume

28

Issue/Number

13

Publication Date

1-1-2013

Document Type

Article

DOI Link

http://dx.doi.org/10.1557/jmr.2013.16

Language

English

First Page

1835

Last Page

1852

WOS Identifier

WOS:000321204900026

ISSN

0884-2914

Recommended Citation

"Effect of ceramic nanoparticle reinforcements on the quasistatic and dynamic mechanical properties of magnesium-based metal matrix composites" (2013). Faculty Bibliography 2010s. 4686.
https://stars.library.ucf.edu/facultybib2010/4686