Powder forging of a sintered Al-3.8Cu-1Mg-0.8Si-0.1Sn alloy

R.J. Dashwood, G.B. Schaffer

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The forging characteristics of an Al–Cu–Mg–Si–Sn alloy are examined using a new testing strategy which incorporates a double truncated cone specimen and finite element modelling. This sample geometry produces controlled strain distributions within a single specimen and can readily identify the specific strain required to achieve a specific microstructural event by matching the metallographic data with the strain profiles calculated from finite element software. The friction conditions were determined using the conventional friction ring test, which was evaluated using finite element software. The rheological properties of the alloy, evaluated from compression testing of right cylinders, are similar to the properties of conventional aluminium forgings. A hoop strain develops at the outer diameter of the truncated cones and this leads to pore opening at the outer few millimetres. The porosity is effectively removed when the total strain equals the net compressive strain. The strain profiles that develop in the truncated cones are largely independent of the processing temperature and the strain rate although the strain required for pore closure increases as the forging temperature is reduced. This suggests that the microstructure and the strain rate sensitivity may also be important factors controlling pore behaviour.
Original languageEnglish
Pages (from-to)206-212
Number of pages7
JournalMaterials Science and Engineering A
Volume323
Issue number1-2
Early online date7 Jan 2002
DOIs
Publication statusPublished - 31 Jan 2002

Fingerprint

forging
Forging
Powders
porosity
cones
strain rate
friction
computer programs
Cones
hoops
strain distribution
profiles
closures
Strain rate
Friction
aluminum
Compression testing
Forgings
microstructure
temperature

Keywords

  • Powder forging
  • Aluminium
  • Pore closure

Cite this

Powder forging of a sintered Al-3.8Cu-1Mg-0.8Si-0.1Sn alloy. / Dashwood, R.J.; Schaffer, G.B.

In: Materials Science and Engineering A, Vol. 323, No. 1-2, 31.01.2002, p. 206-212.

Research output: Contribution to journalArticle

@article{ad2a6185b45a451496577ffccfa8a98c,
title = "Powder forging of a sintered Al-3.8Cu-1Mg-0.8Si-0.1Sn alloy",
abstract = "The forging characteristics of an Al–Cu–Mg–Si–Sn alloy are examined using a new testing strategy which incorporates a double truncated cone specimen and finite element modelling. This sample geometry produces controlled strain distributions within a single specimen and can readily identify the specific strain required to achieve a specific microstructural event by matching the metallographic data with the strain profiles calculated from finite element software. The friction conditions were determined using the conventional friction ring test, which was evaluated using finite element software. The rheological properties of the alloy, evaluated from compression testing of right cylinders, are similar to the properties of conventional aluminium forgings. A hoop strain develops at the outer diameter of the truncated cones and this leads to pore opening at the outer few millimetres. The porosity is effectively removed when the total strain equals the net compressive strain. The strain profiles that develop in the truncated cones are largely independent of the processing temperature and the strain rate although the strain required for pore closure increases as the forging temperature is reduced. This suggests that the microstructure and the strain rate sensitivity may also be important factors controlling pore behaviour.",
keywords = "Powder forging, Aluminium, Pore closure",
author = "R.J. Dashwood and G.B. Schaffer",
year = "2002",
month = "1",
day = "31",
doi = "10.1016/S0921-5093(01)01354-5",
language = "English",
volume = "323",
pages = "206--212",
journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",
issn = "0921-5093",
publisher = "Elsevier",
number = "1-2",

}

TY - JOUR

T1 - Powder forging of a sintered Al-3.8Cu-1Mg-0.8Si-0.1Sn alloy

AU - Dashwood, R.J.

AU - Schaffer, G.B.

PY - 2002/1/31

Y1 - 2002/1/31

N2 - The forging characteristics of an Al–Cu–Mg–Si–Sn alloy are examined using a new testing strategy which incorporates a double truncated cone specimen and finite element modelling. This sample geometry produces controlled strain distributions within a single specimen and can readily identify the specific strain required to achieve a specific microstructural event by matching the metallographic data with the strain profiles calculated from finite element software. The friction conditions were determined using the conventional friction ring test, which was evaluated using finite element software. The rheological properties of the alloy, evaluated from compression testing of right cylinders, are similar to the properties of conventional aluminium forgings. A hoop strain develops at the outer diameter of the truncated cones and this leads to pore opening at the outer few millimetres. The porosity is effectively removed when the total strain equals the net compressive strain. The strain profiles that develop in the truncated cones are largely independent of the processing temperature and the strain rate although the strain required for pore closure increases as the forging temperature is reduced. This suggests that the microstructure and the strain rate sensitivity may also be important factors controlling pore behaviour.

AB - The forging characteristics of an Al–Cu–Mg–Si–Sn alloy are examined using a new testing strategy which incorporates a double truncated cone specimen and finite element modelling. This sample geometry produces controlled strain distributions within a single specimen and can readily identify the specific strain required to achieve a specific microstructural event by matching the metallographic data with the strain profiles calculated from finite element software. The friction conditions were determined using the conventional friction ring test, which was evaluated using finite element software. The rheological properties of the alloy, evaluated from compression testing of right cylinders, are similar to the properties of conventional aluminium forgings. A hoop strain develops at the outer diameter of the truncated cones and this leads to pore opening at the outer few millimetres. The porosity is effectively removed when the total strain equals the net compressive strain. The strain profiles that develop in the truncated cones are largely independent of the processing temperature and the strain rate although the strain required for pore closure increases as the forging temperature is reduced. This suggests that the microstructure and the strain rate sensitivity may also be important factors controlling pore behaviour.

KW - Powder forging

KW - Aluminium

KW - Pore closure

U2 - 10.1016/S0921-5093(01)01354-5

DO - 10.1016/S0921-5093(01)01354-5

M3 - Article

VL - 323

SP - 206

EP - 212

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

IS - 1-2

ER -