Fabrication and properties of powder metallurgical and cast aluminium alloy matrix composite products

Antero Jokinen, Veijo Rauta, Bengt Wiik, Tero Uuttu, Matti Säynätjoki

Research output: Book/ReportReport

Abstract

The addition of ceramic particulates to aluminium alloys is an efficient way to improve some of their properties. However, attention should be paid to the formability of composites as it is often complicated to machine them. In the present work, the manufacture of particulate-reinforced aluminium alloys has been studied with reference to both powder metallurgical (PM) hot extrusion and casting methods including squeeze, gravity die, sand and pressure die-casting. The formability of hot-extruded composites has been investigated by tensile and upsetting testing. The properties of heat-treated composites are presented by tensile, fracture toughness and tribological properties. The results show that good-quality composites can be produced by both PM and casting methods. The forming of wrought composites is more difficult than that of unreinforced alloys and the application of compressive forces is to be preferred (e.g. closed-die forging) in forming operations. The addition of SiC particulates increased the stiffness, strength and wear resistance of both PM and cast composites. However, the ductility and fracture toughness were reduced.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages41
ISBN (Print)951-38-4245-2
Publication statusPublished - 1992
MoE publication typeNot Eligible

Publication series

SeriesVTT Publications
Number127
ISSN1235-0621

Fingerprint

Aluminum alloys
Powders
Fabrication
Composite materials
Formability
Fracture toughness
Casting
Die casting
Wear resistance
Extrusion
Ductility
Gravitation
Sand
Stiffness
Testing

Keywords

  • composite materials
  • aluminum alloys
  • silicon carbides
  • particles fabrication
  • metal extruding
  • die casting
  • squeeze casting
  • tensile properties
  • fracture strength
  • toughness
  • ductility
  • tribology

Cite this

Jokinen, A., Rauta, V., Wiik, B., Uuttu, T., & Säynätjoki, M. (1992). Fabrication and properties of powder metallurgical and cast aluminium alloy matrix composite products. Espoo: VTT Technical Research Centre of Finland. VTT Publications, No. 127
Jokinen, Antero ; Rauta, Veijo ; Wiik, Bengt ; Uuttu, Tero ; Säynätjoki, Matti. / Fabrication and properties of powder metallurgical and cast aluminium alloy matrix composite products. Espoo : VTT Technical Research Centre of Finland, 1992. 41 p. (VTT Publications; No. 127).
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abstract = "The addition of ceramic particulates to aluminium alloys is an efficient way to improve some of their properties. However, attention should be paid to the formability of composites as it is often complicated to machine them. In the present work, the manufacture of particulate-reinforced aluminium alloys has been studied with reference to both powder metallurgical (PM) hot extrusion and casting methods including squeeze, gravity die, sand and pressure die-casting. The formability of hot-extruded composites has been investigated by tensile and upsetting testing. The properties of heat-treated composites are presented by tensile, fracture toughness and tribological properties. The results show that good-quality composites can be produced by both PM and casting methods. The forming of wrought composites is more difficult than that of unreinforced alloys and the application of compressive forces is to be preferred (e.g. closed-die forging) in forming operations. The addition of SiC particulates increased the stiffness, strength and wear resistance of both PM and cast composites. However, the ductility and fracture toughness were reduced.",
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Jokinen, A, Rauta, V, Wiik, B, Uuttu, T & Säynätjoki, M 1992, Fabrication and properties of powder metallurgical and cast aluminium alloy matrix composite products. VTT Publications, no. 127, VTT Technical Research Centre of Finland, Espoo.

Fabrication and properties of powder metallurgical and cast aluminium alloy matrix composite products. / Jokinen, Antero; Rauta, Veijo; Wiik, Bengt; Uuttu, Tero; Säynätjoki, Matti.

Espoo : VTT Technical Research Centre of Finland, 1992. 41 p. (VTT Publications; No. 127).

Research output: Book/ReportReport

TY - BOOK

T1 - Fabrication and properties of powder metallurgical and cast aluminium alloy matrix composite products

AU - Jokinen, Antero

AU - Rauta, Veijo

AU - Wiik, Bengt

AU - Uuttu, Tero

AU - Säynätjoki, Matti

N1 - Project code: MRG1161

PY - 1992

Y1 - 1992

N2 - The addition of ceramic particulates to aluminium alloys is an efficient way to improve some of their properties. However, attention should be paid to the formability of composites as it is often complicated to machine them. In the present work, the manufacture of particulate-reinforced aluminium alloys has been studied with reference to both powder metallurgical (PM) hot extrusion and casting methods including squeeze, gravity die, sand and pressure die-casting. The formability of hot-extruded composites has been investigated by tensile and upsetting testing. The properties of heat-treated composites are presented by tensile, fracture toughness and tribological properties. The results show that good-quality composites can be produced by both PM and casting methods. The forming of wrought composites is more difficult than that of unreinforced alloys and the application of compressive forces is to be preferred (e.g. closed-die forging) in forming operations. The addition of SiC particulates increased the stiffness, strength and wear resistance of both PM and cast composites. However, the ductility and fracture toughness were reduced.

AB - The addition of ceramic particulates to aluminium alloys is an efficient way to improve some of their properties. However, attention should be paid to the formability of composites as it is often complicated to machine them. In the present work, the manufacture of particulate-reinforced aluminium alloys has been studied with reference to both powder metallurgical (PM) hot extrusion and casting methods including squeeze, gravity die, sand and pressure die-casting. The formability of hot-extruded composites has been investigated by tensile and upsetting testing. The properties of heat-treated composites are presented by tensile, fracture toughness and tribological properties. The results show that good-quality composites can be produced by both PM and casting methods. The forming of wrought composites is more difficult than that of unreinforced alloys and the application of compressive forces is to be preferred (e.g. closed-die forging) in forming operations. The addition of SiC particulates increased the stiffness, strength and wear resistance of both PM and cast composites. However, the ductility and fracture toughness were reduced.

KW - composite materials

KW - aluminum alloys

KW - silicon carbides

KW - particles fabrication

KW - metal extruding

KW - die casting

KW - squeeze casting

KW - tensile properties

KW - fracture strength

KW - toughness

KW - ductility

KW - tribology

M3 - Report

SN - 951-38-4245-2

T3 - VTT Publications

BT - Fabrication and properties of powder metallurgical and cast aluminium alloy matrix composite products

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ER -

Jokinen A, Rauta V, Wiik B, Uuttu T, Säynätjoki M. Fabrication and properties of powder metallurgical and cast aluminium alloy matrix composite products. Espoo: VTT Technical Research Centre of Finland, 1992. 41 p. (VTT Publications; No. 127).