Growth behavior of microstructurally short cracks in the 6061 aluminum alloy with and without 22 Vol Pet SiCwhiskers

Hiroyuki Toda, Toshiro Kobayashi

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Short crack growth behavior of the 6061 Al alloy with and without SiC whiskers was investigated. Fluctuations in the growth rate of short cracks converge with growth of the cracks and become substantially constant between 25 and 40 μm in the metal matrix composite (MMC) and 110 and 183 μm in the unreinforced alloy. This is attributed to the release of the short cracks from the microstructural effects, i.e., the interaction with reinforcement structure in the MMC and grain boundaries in the unreinforced alloy. Furthermore, there exists slowing down of short crack advance in the MMC, and this was explained from rapid development of crack closure obtained in this study.

Original languageEnglish
Pages (from-to)2013-2021
Number of pages9
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume27
Issue number7
DOIs
Publication statusPublished - Jan 1 1996

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short cracks
aluminum alloys
metal matrix composites
Aluminum alloys
Cracks
Metals
reinforcement (structures)
Composite materials
crack closure
Crack closure
Crack propagation
Reinforcement
Grain boundaries
cracks
grain boundaries
interactions

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

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abstract = "Short crack growth behavior of the 6061 Al alloy with and without SiC whiskers was investigated. Fluctuations in the growth rate of short cracks converge with growth of the cracks and become substantially constant between 25 and 40 μm in the metal matrix composite (MMC) and 110 and 183 μm in the unreinforced alloy. This is attributed to the release of the short cracks from the microstructural effects, i.e., the interaction with reinforcement structure in the MMC and grain boundaries in the unreinforced alloy. Furthermore, there exists slowing down of short crack advance in the MMC, and this was explained from rapid development of crack closure obtained in this study.",
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T1 - Growth behavior of microstructurally short cracks in the 6061 aluminum alloy with and without 22 Vol Pet SiCwhiskers

AU - Toda, Hiroyuki

AU - Kobayashi, Toshiro

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Y1 - 1996/1/1

N2 - Short crack growth behavior of the 6061 Al alloy with and without SiC whiskers was investigated. Fluctuations in the growth rate of short cracks converge with growth of the cracks and become substantially constant between 25 and 40 μm in the metal matrix composite (MMC) and 110 and 183 μm in the unreinforced alloy. This is attributed to the release of the short cracks from the microstructural effects, i.e., the interaction with reinforcement structure in the MMC and grain boundaries in the unreinforced alloy. Furthermore, there exists slowing down of short crack advance in the MMC, and this was explained from rapid development of crack closure obtained in this study.

AB - Short crack growth behavior of the 6061 Al alloy with and without SiC whiskers was investigated. Fluctuations in the growth rate of short cracks converge with growth of the cracks and become substantially constant between 25 and 40 μm in the metal matrix composite (MMC) and 110 and 183 μm in the unreinforced alloy. This is attributed to the release of the short cracks from the microstructural effects, i.e., the interaction with reinforcement structure in the MMC and grain boundaries in the unreinforced alloy. Furthermore, there exists slowing down of short crack advance in the MMC, and this was explained from rapid development of crack closure obtained in this study.

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