Interfacial strength and deformation mechanism of SiC-Al composite micro-pillars

Xiaolei Guo; Qiang Guo; Zhiqiang Li; Genlian Fan; Ding Bang Xiong; Yishi Su; Jie Zhang; Chee Lip Gan; Di Zhang

doi:10.1016/j.scriptamat.2015.11.018

Interfacial strength and deformation mechanism of SiC-Al composite micro-pillars

Xiaolei Guo, Qiang Guo^*, Zhiqiang Li, Genlian Fan, Ding Bang Xiong, Yishi Su, Jie Zhang, Chee Lip Gan, Di Zhang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

85 Citations (Scopus)

Abstract

A comprehensive understanding of the interfacial properties in particle-reinforced metal matrix composites (PRMMCs) requires an accurate determination of the cohesive strength of the interface. In this study, micro-pillars containing a slanted SiC/Al interface were fabricated, and were tested by uniaxial compression. The interfacial shear strength was found to be 133 ± 26 MPa, consistent with values predicted by numerical simulations. The stress-strain response of the composite pillars was characterized by shorter strain bursts and more significant strain hardening, as compared with their monolithic Al counterparts. These observations were interpreted by grain fragmentation and dislocation pile-up at the SiC/Al interface upon deformation.

Original language	English
Pages (from-to)	56-59
Number of pages	4
Journal	Scripta Materialia
Volume	114
DOIs	https://doi.org/10.1016/j.scriptamat.2015.11.018
Publication status	Published - Mar 15 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 Elsevier B.V.

ASJC Scopus Subject Areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Keywords

Compression
Deformation structure
Interfacial strength
Metal matrix composites
Microstructure

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10.1016/j.scriptamat.2015.11.018

Cite this

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title = "Interfacial strength and deformation mechanism of SiC-Al composite micro-pillars",

abstract = "A comprehensive understanding of the interfacial properties in particle-reinforced metal matrix composites (PRMMCs) requires an accurate determination of the cohesive strength of the interface. In this study, micro-pillars containing a slanted SiC/Al interface were fabricated, and were tested by uniaxial compression. The interfacial shear strength was found to be 133 ± 26 MPa, consistent with values predicted by numerical simulations. The stress-strain response of the composite pillars was characterized by shorter strain bursts and more significant strain hardening, as compared with their monolithic Al counterparts. These observations were interpreted by grain fragmentation and dislocation pile-up at the SiC/Al interface upon deformation.",

keywords = "Compression, Deformation structure, Interfacial strength, Metal matrix composites, Microstructure",

author = "Xiaolei Guo and Qiang Guo and Zhiqiang Li and Genlian Fan and Xiong, \{Ding Bang\} and Yishi Su and Jie Zhang and Gan, \{Chee Lip\} and Di Zhang",

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doi = "10.1016/j.scriptamat.2015.11.018",

language = "English",

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T1 - Interfacial strength and deformation mechanism of SiC-Al composite micro-pillars

AU - Guo, Xiaolei

AU - Guo, Qiang

AU - Li, Zhiqiang

AU - Fan, Genlian

AU - Xiong, Ding Bang

AU - Su, Yishi

AU - Zhang, Jie

AU - Gan, Chee Lip

AU - Zhang, Di

PY - 2016/3/15

Y1 - 2016/3/15

N2 - A comprehensive understanding of the interfacial properties in particle-reinforced metal matrix composites (PRMMCs) requires an accurate determination of the cohesive strength of the interface. In this study, micro-pillars containing a slanted SiC/Al interface were fabricated, and were tested by uniaxial compression. The interfacial shear strength was found to be 133 ± 26 MPa, consistent with values predicted by numerical simulations. The stress-strain response of the composite pillars was characterized by shorter strain bursts and more significant strain hardening, as compared with their monolithic Al counterparts. These observations were interpreted by grain fragmentation and dislocation pile-up at the SiC/Al interface upon deformation.

AB - A comprehensive understanding of the interfacial properties in particle-reinforced metal matrix composites (PRMMCs) requires an accurate determination of the cohesive strength of the interface. In this study, micro-pillars containing a slanted SiC/Al interface were fabricated, and were tested by uniaxial compression. The interfacial shear strength was found to be 133 ± 26 MPa, consistent with values predicted by numerical simulations. The stress-strain response of the composite pillars was characterized by shorter strain bursts and more significant strain hardening, as compared with their monolithic Al counterparts. These observations were interpreted by grain fragmentation and dislocation pile-up at the SiC/Al interface upon deformation.

KW - Compression

KW - Deformation structure

KW - Interfacial strength

KW - Metal matrix composites

KW - Microstructure

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DO - 10.1016/j.scriptamat.2015.11.018

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VL - 114

SP - 56

EP - 59

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Interfacial strength and deformation mechanism of SiC-Al composite micro-pillars

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

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