Abstract
The dissolution kinetics of the θ phase during solution treatment and isothermal precipitation kinetics during aging in an Al-6.2Si-2.9Cu alloy were quantitatively examined through electrical resistivity, hardness, and transmission electron microscopy (TEM). The electrical resistivity successfully predicted that pre-existing θ particles in the as-cast Al-Si-Cu alloy were fully dissolved after 4.5 h at 500 C, which was in a good agreement with that directly observed by TEM. The electrical resistivity immediately decreased during aging at 250 C due to the precipitation of θ′ phase and was saturated within 2 h. A maximum hardness peak appeared in 1 h at 250 C due to the formation of a metastable θ′ phase, and then gradually decreased due to the coarsening of the θ′ phase as well as the annihilation of the θ″ phase. The θ′ phase was finally transformed to θ phase after 3.5 h at 250 C.
| Original language | English |
|---|---|
| Pages (from-to) | 147-152 |
| Number of pages | 6 |
| Journal | Metals and Materials International |
| Volume | 19 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2013 Mar 1 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry
Cite this
}
Quantitative analyses of dissolution and precipitation kinetics of θ-Al2Cu phase in an Al-6.2Si-2.9Cu alloy using electrical resistivity. / Jung, Jae Gil; Park, June Soo; Lee, Young Kook.
In: Metals and Materials International, Vol. 19, No. 2, 01.03.2013, p. 147-152.Research output: Contribution to journal › Article
TY - JOUR
T1 - Quantitative analyses of dissolution and precipitation kinetics of θ-Al2Cu phase in an Al-6.2Si-2.9Cu alloy using electrical resistivity
AU - Jung, Jae Gil
AU - Park, June Soo
AU - Lee, Young Kook
PY - 2013/3/1
Y1 - 2013/3/1
N2 - The dissolution kinetics of the θ phase during solution treatment and isothermal precipitation kinetics during aging in an Al-6.2Si-2.9Cu alloy were quantitatively examined through electrical resistivity, hardness, and transmission electron microscopy (TEM). The electrical resistivity successfully predicted that pre-existing θ particles in the as-cast Al-Si-Cu alloy were fully dissolved after 4.5 h at 500 C, which was in a good agreement with that directly observed by TEM. The electrical resistivity immediately decreased during aging at 250 C due to the precipitation of θ′ phase and was saturated within 2 h. A maximum hardness peak appeared in 1 h at 250 C due to the formation of a metastable θ′ phase, and then gradually decreased due to the coarsening of the θ′ phase as well as the annihilation of the θ″ phase. The θ′ phase was finally transformed to θ phase after 3.5 h at 250 C.
AB - The dissolution kinetics of the θ phase during solution treatment and isothermal precipitation kinetics during aging in an Al-6.2Si-2.9Cu alloy were quantitatively examined through electrical resistivity, hardness, and transmission electron microscopy (TEM). The electrical resistivity successfully predicted that pre-existing θ particles in the as-cast Al-Si-Cu alloy were fully dissolved after 4.5 h at 500 C, which was in a good agreement with that directly observed by TEM. The electrical resistivity immediately decreased during aging at 250 C due to the precipitation of θ′ phase and was saturated within 2 h. A maximum hardness peak appeared in 1 h at 250 C due to the formation of a metastable θ′ phase, and then gradually decreased due to the coarsening of the θ′ phase as well as the annihilation of the θ″ phase. The θ′ phase was finally transformed to θ phase after 3.5 h at 250 C.
UR - http://www.scopus.com/inward/record.url?scp=84879648052&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84879648052&partnerID=8YFLogxK
U2 - 10.1007/s12540-013-2002-5
DO - 10.1007/s12540-013-2002-5
M3 - Article
AN - SCOPUS:84879648052
VL - 19
SP - 147
EP - 152
JO - Metals and Materials International
JF - Metals and Materials International
SN - 1598-9623
IS - 2
ER -