Effects of Ce on the thermal stability of the Ω phase in a cast aluminum metal matrix composite

F. Melotti; A. Dustan; T. Hirst; W. D. Griffiths

Effects of Ce on the thermal stability of the Ω phase in a cast aluminum metal matrix composite

F. Melotti, A. Dustan, T. Hirst, W. D. Griffiths

Metallurgy and Materials

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

This work assesses the effect of Ce additions on the thermal stability of the Ω phase in an aluminum alloy matrix composite. Several additions of Ce, up to 1.5 wt. %, were made to an AA205 alloy, a novel MMC, and the thermal stability of the Ω phase tested at 230°C, for up to 100 hours. Microstructural evaluation was carried out with optical microscopy and scanning electron microscopy (SEM). In addition, hardness tests were carried out during the 100 hours. The results showed that when the reinforcement particles were present in the alloy, the Ce did not have any beneficial effects on mechanical properties. In particular, the Ce poisoned the grain refinement of the alloy by nucleating around the TiB₂ particles. Energy dispersive X-ray spectroscopy (EDS) suggested the Ce-phase to be CeTi₂Al₂₀.

Original language	English
Title of host publication	TMS Annual Meeting
Publisher	The Minerals, Metals and Materials Society
Pages	137-144
Number of pages	8
Volume	2015-March
ISBN (Print)	9781119082385
Publication status	Published - 2015
Event	Advances in the Science and Engineering of Casting Solidification: An MPMD Symposium Honoring Doru Michael Stefanescu - TMS 2015 144th Annual Meeting and Exhibition - Orlando, United States Duration: 15 Mar 2015 → 19 Mar 2015

Conference

Conference	Advances in the Science and Engineering of Casting Solidification: An MPMD Symposium Honoring Doru Michael Stefanescu - TMS 2015 144th Annual Meeting and Exhibition
Country/Territory	United States
City	Orlando
Period	15/03/15 → 19/03/15

Keywords

Aluminum alloys
Cerium
Metal matrix composite

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys

Cite this

@inproceedings{5c02206cff2e44549dcaadc0375cd581,

title = "Effects of Ce on the thermal stability of the Ω phase in a cast aluminum metal matrix composite",

abstract = "This work assesses the effect of Ce additions on the thermal stability of the Ω phase in an aluminum alloy matrix composite. Several additions of Ce, up to 1.5 wt. %, were made to an AA205 alloy, a novel MMC, and the thermal stability of the Ω phase tested at 230°C, for up to 100 hours. Microstructural evaluation was carried out with optical microscopy and scanning electron microscopy (SEM). In addition, hardness tests were carried out during the 100 hours. The results showed that when the reinforcement particles were present in the alloy, the Ce did not have any beneficial effects on mechanical properties. In particular, the Ce poisoned the grain refinement of the alloy by nucleating around the TiB2 particles. Energy dispersive X-ray spectroscopy (EDS) suggested the Ce-phase to be CeTi2Al20.",

keywords = "Aluminum alloys, Cerium, Metal matrix composite",

author = "F. Melotti and A. Dustan and T. Hirst and Griffiths, {W. D.}",

year = "2015",

language = "English",

isbn = "9781119082385",

volume = "2015-March",

pages = "137--144",

booktitle = "TMS Annual Meeting",

publisher = "The Minerals, Metals and Materials Society",

note = "Advances in the Science and Engineering of Casting Solidification: An MPMD Symposium Honoring Doru Michael Stefanescu - TMS 2015 144th Annual Meeting and Exhibition ; Conference date: 15-03-2015 Through 19-03-2015",

}

Melotti, F, Dustan, A, Hirst, T & Griffiths, WD 2015, Effects of Ce on the thermal stability of the Ω phase in a cast aluminum metal matrix composite. in TMS Annual Meeting. vol. 2015-March, The Minerals, Metals and Materials Society, pp. 137-144, Advances in the Science and Engineering of Casting Solidification: An MPMD Symposium Honoring Doru Michael Stefanescu - TMS 2015 144th Annual Meeting and Exhibition, Orlando, United States, 15/03/15.

TY - GEN

T1 - Effects of Ce on the thermal stability of the Ω phase in a cast aluminum metal matrix composite

AU - Melotti, F.

AU - Dustan, A.

AU - Hirst, T.

AU - Griffiths, W. D.

PY - 2015

Y1 - 2015

N2 - This work assesses the effect of Ce additions on the thermal stability of the Ω phase in an aluminum alloy matrix composite. Several additions of Ce, up to 1.5 wt. %, were made to an AA205 alloy, a novel MMC, and the thermal stability of the Ω phase tested at 230°C, for up to 100 hours. Microstructural evaluation was carried out with optical microscopy and scanning electron microscopy (SEM). In addition, hardness tests were carried out during the 100 hours. The results showed that when the reinforcement particles were present in the alloy, the Ce did not have any beneficial effects on mechanical properties. In particular, the Ce poisoned the grain refinement of the alloy by nucleating around the TiB2 particles. Energy dispersive X-ray spectroscopy (EDS) suggested the Ce-phase to be CeTi2Al20.

AB - This work assesses the effect of Ce additions on the thermal stability of the Ω phase in an aluminum alloy matrix composite. Several additions of Ce, up to 1.5 wt. %, were made to an AA205 alloy, a novel MMC, and the thermal stability of the Ω phase tested at 230°C, for up to 100 hours. Microstructural evaluation was carried out with optical microscopy and scanning electron microscopy (SEM). In addition, hardness tests were carried out during the 100 hours. The results showed that when the reinforcement particles were present in the alloy, the Ce did not have any beneficial effects on mechanical properties. In particular, the Ce poisoned the grain refinement of the alloy by nucleating around the TiB2 particles. Energy dispersive X-ray spectroscopy (EDS) suggested the Ce-phase to be CeTi2Al20.

KW - Aluminum alloys

KW - Cerium

KW - Metal matrix composite

UR - http://www.scopus.com/inward/record.url?scp=84931412868&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84931412868

SN - 9781119082385

VL - 2015-March

SP - 137

EP - 144

BT - TMS Annual Meeting

PB - The Minerals, Metals and Materials Society

T2 - Advances in the Science and Engineering of Casting Solidification: An MPMD Symposium Honoring Doru Michael Stefanescu - TMS 2015 144th Annual Meeting and Exhibition

Y2 - 15 March 2015 through 19 March 2015

ER -

Effects of Ce on the thermal stability of the Ω phase in a cast aluminum metal matrix composite

Abstract

Conference

Keywords

ASJC Scopus subject areas

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