In-situ observations of fracture processes in 0.6 μm and 9.5 μm SiCP/6061Al composites

Lihe Qian, Hiroyuki Toda, Shigeki Morita, Toshiro Kobayashi, Zhong Guang Wang

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In-situ SEM observations of fracture processes in two 6061 AI alloy composites reinforced with coarse and fine SiC particles, respectively, were carried out to clarify their fracture mechanisms. It was found that in the coarse particle reinforced composite, voids were formed in the matrix around SiC particles ahead of the main crack tip, then coalesced with each other, and finally connected with the main crack tip, causing propagation of the main crack. However, in the fine particle reinforced composite, multiple micro-cracks were formed at the boundaries between SiC particle clusters and surrounding matrix or within the clusters, then connected with each other, and finally joined with the main crack tip, leading to crack branching and growth of the main crack. Crack branching, multiple cracking and crack deflection were proposed to contribute to the enhanced fracture toughness in the fine particle reinforced composite compared with the coarse particle reinforced composite.

Original languageEnglish
Pages (from-to)34-41
Number of pages8
JournalMaterials Transactions
Volume46
Issue number1
DOIs
Publication statusPublished - Jan 1 2005

Fingerprint

Particle reinforced composites
Cracks
cracks
composite materials
Composite materials
Crack tips
crack tips
matrices
fracture strength
Fracture toughness
Crack propagation
deflection
voids
Scanning electron microscopy
scanning electron microscopy
propagation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

In-situ observations of fracture processes in 0.6 μm and 9.5 μm SiCP/6061Al composites. / Qian, Lihe; Toda, Hiroyuki; Morita, Shigeki; Kobayashi, Toshiro; Wang, Zhong Guang.

In: Materials Transactions, Vol. 46, No. 1, 01.01.2005, p. 34-41.

Research output: Contribution to journalArticle

Qian, Lihe ; Toda, Hiroyuki ; Morita, Shigeki ; Kobayashi, Toshiro ; Wang, Zhong Guang. / In-situ observations of fracture processes in 0.6 μm and 9.5 μm SiCP/6061Al composites. In: Materials Transactions. 2005 ; Vol. 46, No. 1. pp. 34-41.
@article{e69c4ca6d80c4ac9919eea590a4a2e06,
title = "In-situ observations of fracture processes in 0.6 μm and 9.5 μm SiCP/6061Al composites",
abstract = "In-situ SEM observations of fracture processes in two 6061 AI alloy composites reinforced with coarse and fine SiC particles, respectively, were carried out to clarify their fracture mechanisms. It was found that in the coarse particle reinforced composite, voids were formed in the matrix around SiC particles ahead of the main crack tip, then coalesced with each other, and finally connected with the main crack tip, causing propagation of the main crack. However, in the fine particle reinforced composite, multiple micro-cracks were formed at the boundaries between SiC particle clusters and surrounding matrix or within the clusters, then connected with each other, and finally joined with the main crack tip, leading to crack branching and growth of the main crack. Crack branching, multiple cracking and crack deflection were proposed to contribute to the enhanced fracture toughness in the fine particle reinforced composite compared with the coarse particle reinforced composite.",
author = "Lihe Qian and Hiroyuki Toda and Shigeki Morita and Toshiro Kobayashi and Wang, {Zhong Guang}",
year = "2005",
month = "1",
day = "1",
doi = "10.2320/matertrans.46.34",
language = "English",
volume = "46",
pages = "34--41",
journal = "Materials Transactions",
issn = "0916-1821",
publisher = "The Japan Institute of Metals and Materials",
number = "1",

}

TY - JOUR

T1 - In-situ observations of fracture processes in 0.6 μm and 9.5 μm SiCP/6061Al composites

AU - Qian, Lihe

AU - Toda, Hiroyuki

AU - Morita, Shigeki

AU - Kobayashi, Toshiro

AU - Wang, Zhong Guang

PY - 2005/1/1

Y1 - 2005/1/1

N2 - In-situ SEM observations of fracture processes in two 6061 AI alloy composites reinforced with coarse and fine SiC particles, respectively, were carried out to clarify their fracture mechanisms. It was found that in the coarse particle reinforced composite, voids were formed in the matrix around SiC particles ahead of the main crack tip, then coalesced with each other, and finally connected with the main crack tip, causing propagation of the main crack. However, in the fine particle reinforced composite, multiple micro-cracks were formed at the boundaries between SiC particle clusters and surrounding matrix or within the clusters, then connected with each other, and finally joined with the main crack tip, leading to crack branching and growth of the main crack. Crack branching, multiple cracking and crack deflection were proposed to contribute to the enhanced fracture toughness in the fine particle reinforced composite compared with the coarse particle reinforced composite.

AB - In-situ SEM observations of fracture processes in two 6061 AI alloy composites reinforced with coarse and fine SiC particles, respectively, were carried out to clarify their fracture mechanisms. It was found that in the coarse particle reinforced composite, voids were formed in the matrix around SiC particles ahead of the main crack tip, then coalesced with each other, and finally connected with the main crack tip, causing propagation of the main crack. However, in the fine particle reinforced composite, multiple micro-cracks were formed at the boundaries between SiC particle clusters and surrounding matrix or within the clusters, then connected with each other, and finally joined with the main crack tip, leading to crack branching and growth of the main crack. Crack branching, multiple cracking and crack deflection were proposed to contribute to the enhanced fracture toughness in the fine particle reinforced composite compared with the coarse particle reinforced composite.

UR - http://www.scopus.com/inward/record.url?scp=28844471552&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=28844471552&partnerID=8YFLogxK

U2 - 10.2320/matertrans.46.34

DO - 10.2320/matertrans.46.34

M3 - Article

VL - 46

SP - 34

EP - 41

JO - Materials Transactions

JF - Materials Transactions

SN - 0916-1821

IS - 1

ER -