Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 206-212 |
| Number of pages | 7 |
| Journal | Materials Science and Engineering A |
| Volume | 323 |
| Issue number | 1-2 |
| Early online date | 7 Jan 2002 |
| DOIs | |
| Publication status | Published - 31 Jan 2002 |
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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 journal › Article
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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 -