Abstract
To predict hot tearing of direct chill casting ingot, both the tensile constitutive behavior and elongation of alloy are inevitable during partial solidification. For predicting both the maximum true stress ·ss and the elongation ¾elong regardless of alloy systems, their dominant factor was examined in terms of the solidification microstructure. For an AlMg and an AlCu alloys, (i) temperature T dependences of the maximum true stress and elongation (·ss = f(T) and ¾elong = f(T)) and (ii) dihedral angle ª of liquid phase formed at grain boundary were measured experimentally. Then, fraction of solid cohesion C was determined by the Campbell’s model using the angle. Firstly, the solid fraction dependence of the tensile properties (·ss = f(fs) and ¾elong = f(fs)) were compared between the two alloys. The two dependences differ with each other. Secondly, the fraction of solid cohesion dependences of the tensile properties (·ss = f(C) and ¾elong = f(C)) were compared and the result shows that the two dependences were consistent with each other. The fraction of solid cohesion enables to explain the difference in solid fraction dependence of the tensile properties for the two alloys. The result demonstrates that the dihedral angle should be essential to predict the two tensile properties of alloy during partial solidification. [doi:10.2320/matertrans.L-M2019839]
| Original language | English |
|---|---|
| Pages (from-to) | 2406-2415 |
| Number of pages | 10 |
| Journal | Materials Transactions |
| Volume | 60 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2019 Jan 1 |
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Keywords
- Brittle temperature range
- Constitutive behavior
- Dihedral angle
- Hot tearing
- Semi-solid
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Cite this
Controlling factor for maximum tensile stress and elongation of aluminum alloy during partial solidification. / Takai, Ryosuke; Hirohara, Rei; Endo, Naoki; Nagata, Yoshihiro; Okane, Toshimitsu; Yoshida, Makoto.
In: Materials Transactions, Vol. 60, No. 11, 01.01.2019, p. 2406-2415.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Controlling factor for maximum tensile stress and elongation of aluminum alloy during partial solidification
AU - Takai, Ryosuke
AU - Hirohara, Rei
AU - Endo, Naoki
AU - Nagata, Yoshihiro
AU - Okane, Toshimitsu
AU - Yoshida, Makoto
PY - 2019/1/1
Y1 - 2019/1/1
N2 - To predict hot tearing of direct chill casting ingot, both the tensile constitutive behavior and elongation of alloy are inevitable during partial solidification. For predicting both the maximum true stress ·ss and the elongation ¾elong regardless of alloy systems, their dominant factor was examined in terms of the solidification microstructure. For an AlMg and an AlCu alloys, (i) temperature T dependences of the maximum true stress and elongation (·ss = f(T) and ¾elong = f(T)) and (ii) dihedral angle ª of liquid phase formed at grain boundary were measured experimentally. Then, fraction of solid cohesion C was determined by the Campbell’s model using the angle. Firstly, the solid fraction dependence of the tensile properties (·ss = f(fs) and ¾elong = f(fs)) were compared between the two alloys. The two dependences differ with each other. Secondly, the fraction of solid cohesion dependences of the tensile properties (·ss = f(C) and ¾elong = f(C)) were compared and the result shows that the two dependences were consistent with each other. The fraction of solid cohesion enables to explain the difference in solid fraction dependence of the tensile properties for the two alloys. The result demonstrates that the dihedral angle should be essential to predict the two tensile properties of alloy during partial solidification. [doi:10.2320/matertrans.L-M2019839]
AB - To predict hot tearing of direct chill casting ingot, both the tensile constitutive behavior and elongation of alloy are inevitable during partial solidification. For predicting both the maximum true stress ·ss and the elongation ¾elong regardless of alloy systems, their dominant factor was examined in terms of the solidification microstructure. For an AlMg and an AlCu alloys, (i) temperature T dependences of the maximum true stress and elongation (·ss = f(T) and ¾elong = f(T)) and (ii) dihedral angle ª of liquid phase formed at grain boundary were measured experimentally. Then, fraction of solid cohesion C was determined by the Campbell’s model using the angle. Firstly, the solid fraction dependence of the tensile properties (·ss = f(fs) and ¾elong = f(fs)) were compared between the two alloys. The two dependences differ with each other. Secondly, the fraction of solid cohesion dependences of the tensile properties (·ss = f(C) and ¾elong = f(C)) were compared and the result shows that the two dependences were consistent with each other. The fraction of solid cohesion enables to explain the difference in solid fraction dependence of the tensile properties for the two alloys. The result demonstrates that the dihedral angle should be essential to predict the two tensile properties of alloy during partial solidification. [doi:10.2320/matertrans.L-M2019839]
KW - Brittle temperature range
KW - Constitutive behavior
KW - Dihedral angle
KW - Hot tearing
KW - Semi-solid
UR - http://www.scopus.com/inward/record.url?scp=85074293599&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85074293599&partnerID=8YFLogxK
U2 - 10.2320/matertrans.L-M2019839
DO - 10.2320/matertrans.L-M2019839
M3 - Article
AN - SCOPUS:85074293599
VL - 60
SP - 2406
EP - 2415
JO - Materials Transactions
JF - Materials Transactions
SN - 1345-9678
IS - 11
ER -