Correlation of microstructure with mechanical properties and fracture toughness of A356 aluminum alloys fabricated by low-pressure-casting, rheo-casting, and casting-forging processes
SCIE
SCOPUS
- Title
- Correlation of microstructure with mechanical properties and fracture toughness of A356 aluminum alloys fabricated by low-pressure-casting, rheo-casting, and casting-forging processes
- Authors
- Lee, K; Kwon, YN; Lee, S
- Date Issued
- 2008-09
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Abstract
- Correlation of microstructure with mechanical properties and fracture toughness of three cast A356 aluminum alloys fabricated by low-pressure-casting, rheo-casting, and casting-forging was investigated in this study. Microfracture observation results showed that eutectic Si particles were cracked first, but that the aluminum matrix played a role in blocking crack propagation. Tensile properties and fracture toughness of the cast-forged alloy were superior to those of the low-pressure-cast or rheo-cast alloy. These results were interpreted by a simple fracture initiation model based on the basic assumption that crack extension initiated at a certain critical strain developed over some microstructurally significant distance. (c) 2008 Elsevier Ltd. All rights reserved.
- Keywords
- A356 Al alloy; eutectic Si particle; fracture toughness; microfracture process; STEEL; DEFORMATION; BEHAVIOR; FORMABILITY; FLUIDITY
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/22665
- DOI
- 10.1016/J.ENGFRACMEC
- ISSN
- 0013-7944
- Article Type
- Article
- Citation
- ENGINEERING FRACTURE MECHANICS, vol. 75, no. 14, page. 4200 - 4216, 2008-09
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