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Effect of intermetallic particles and grain boundaries on short fatigue crack growth behaviour in a cast Al-4Cu-3Ni-0.7Si piston alloy

Effect of intermetallic particles and grain boundaries on short fatigue crack growth behaviour in a cast Al-4Cu-3Ni-0.7Si piston alloy
Effect of intermetallic particles and grain boundaries on short fatigue crack growth behaviour in a cast Al-4Cu-3Ni-0.7Si piston alloy
The short fatigue crack growth behaviour in a model cast aluminium piston alloy has been investigated. This has been achieved using a combination of fatigue crack replication methods at various intervals during fatigue testing and post-mortem analysis of crack profiles. Crack-microstructure interactions have been clearly delineated using a combination of optical microscopy, scanning electron microscopy and electron backscatter diffraction. Results show that intermetallic particles play a significant role in determining the crack path and growth rate of short fatigue cracks. It is observed that the growth of short cracks is often retarded or even arrested at intermetallic particles and grain boundaries. Crack deflection at intermetallics and grain boundaries is also frequently observed. These results have been compared with the long crack growth behaviour of the alloy.
Cast aluminium, Fatigue, Micromechanisms of fracture, Piston alloys, Short fatigue cracks.
8756-758X
1428-1442
Mbuya, T.O.
e8fd6a99-5472-4af3-8394-8dafe9e14f24
Gu, Y.
39b5471b-b052-426d-b3fb-7621d85fb289
Thomson, R.C.
8e9ac990-b234-488a-bc4d-1470a63ec93a
Reed, P.A.S.
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Mbuya, T.O.
e8fd6a99-5472-4af3-8394-8dafe9e14f24
Gu, Y.
39b5471b-b052-426d-b3fb-7621d85fb289
Thomson, R.C.
8e9ac990-b234-488a-bc4d-1470a63ec93a
Reed, P.A.S.
8b79d87f-3288-4167-bcfc-c1de4b93ce17

Mbuya, T.O., Gu, Y., Thomson, R.C. and Reed, P.A.S. (2017) Effect of intermetallic particles and grain boundaries on short fatigue crack growth behaviour in a cast Al-4Cu-3Ni-0.7Si piston alloy. Fatigue & Fracture of Engineering Materials & Structures, 40 (9), 1428-1442. (doi:10.1111/ffe.12586).

Record type: Article

Abstract

The short fatigue crack growth behaviour in a model cast aluminium piston alloy has been investigated. This has been achieved using a combination of fatigue crack replication methods at various intervals during fatigue testing and post-mortem analysis of crack profiles. Crack-microstructure interactions have been clearly delineated using a combination of optical microscopy, scanning electron microscopy and electron backscatter diffraction. Results show that intermetallic particles play a significant role in determining the crack path and growth rate of short fatigue cracks. It is observed that the growth of short cracks is often retarded or even arrested at intermetallic particles and grain boundaries. Crack deflection at intermetallics and grain boundaries is also frequently observed. These results have been compared with the long crack growth behaviour of the alloy.

Text
Effect of intermetallic particles and grain boundaries on short fatigue crack growth behaviour in a cast Al-4Cu-3Ni-0.7Si piston alloy - Accepted Manuscript
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More information

Accepted/In Press date: 9 January 2017
e-pub ahead of print date: 26 January 2017
Published date: September 2017
Keywords: Cast aluminium, Fatigue, Micromechanisms of fracture, Piston alloys, Short fatigue cracks.
Organisations: Engineering Mats & Surface Engineerg Gp, Engineering Science Unit, Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 405785
URI: http://eprints.soton.ac.uk/id/eprint/405785
ISSN: 8756-758X
PURE UUID: 17d2d454-0a67-4ffa-ad45-0109b666754c
ORCID for P.A.S. Reed: ORCID iD orcid.org/0000-0002-2258-0347

Catalogue record

Date deposited: 18 Feb 2017 00:21
Last modified: 07 Oct 2020 06:24

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