Abstract
Seven samples of austenitic stainless steel strip about 1.5mm thick were produced by the strip casting process. The Creq/Nieq ratio of the stainless steel strips was varied from about 1.23 to 1.95. The solidification structures and the corresponding tensile properties of the as-cast strips were studied. The experimental results show that the solidification mode of austenitic stainless steel strips is dependent on the Creq/Nieq ratio. When the Creq/Nieq ratio is less than 1.48, primary austenite forms during solidification and the strips consist of cellular austenite. However, when the Creq/Nieq ratio is greater than 1.48, primary δ-ferrite forms initially and transforms to an austenite phase through peritectic reaction. As a result, the solidification structures contain about 4-10 vol% δ-ferrite among the austenitic dendrites. The content of δ-ferrite increases with an increase in the Creq/Nieq ratio of the strips. According to the tensile tests, the flow stress at 0.2% elongation and the UTS vary independently of the Creq/Nieq ratio, with the elongation tending to decrease for those strips with a Creq/Nieq ratio less than 1.48 or greater than 1.81. It appears that this is related to micro-shrinkage porosity in the austenitic structures and to interfacial tears in the γ/δ dendritic structures.
| Original language | English |
|---|---|
| Pages (from-to) | 175-181 |
| Number of pages | 7 |
| Journal | International Journal of Cast Metals Research |
| Volume | 9 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1996 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
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Influence of Creq/Nieq ratio on solidification structures and tensile properties of strip cast austenitic stainless steels. / Chao, Y. W.; Lui, Truan-Sheng; Chen, L. H.
In: International Journal of Cast Metals Research, Vol. 9, No. 3, 01.01.1996, p. 175-181.Research output: Contribution to journal › Article
TY - JOUR
T1 - Influence of Creq/Nieq ratio on solidification structures and tensile properties of strip cast austenitic stainless steels
AU - Chao, Y. W.
AU - Lui, Truan-Sheng
AU - Chen, L. H.
PY - 1996/1/1
Y1 - 1996/1/1
N2 - Seven samples of austenitic stainless steel strip about 1.5mm thick were produced by the strip casting process. The Creq/Nieq ratio of the stainless steel strips was varied from about 1.23 to 1.95. The solidification structures and the corresponding tensile properties of the as-cast strips were studied. The experimental results show that the solidification mode of austenitic stainless steel strips is dependent on the Creq/Nieq ratio. When the Creq/Nieq ratio is less than 1.48, primary austenite forms during solidification and the strips consist of cellular austenite. However, when the Creq/Nieq ratio is greater than 1.48, primary δ-ferrite forms initially and transforms to an austenite phase through peritectic reaction. As a result, the solidification structures contain about 4-10 vol% δ-ferrite among the austenitic dendrites. The content of δ-ferrite increases with an increase in the Creq/Nieq ratio of the strips. According to the tensile tests, the flow stress at 0.2% elongation and the UTS vary independently of the Creq/Nieq ratio, with the elongation tending to decrease for those strips with a Creq/Nieq ratio less than 1.48 or greater than 1.81. It appears that this is related to micro-shrinkage porosity in the austenitic structures and to interfacial tears in the γ/δ dendritic structures.
AB - Seven samples of austenitic stainless steel strip about 1.5mm thick were produced by the strip casting process. The Creq/Nieq ratio of the stainless steel strips was varied from about 1.23 to 1.95. The solidification structures and the corresponding tensile properties of the as-cast strips were studied. The experimental results show that the solidification mode of austenitic stainless steel strips is dependent on the Creq/Nieq ratio. When the Creq/Nieq ratio is less than 1.48, primary austenite forms during solidification and the strips consist of cellular austenite. However, when the Creq/Nieq ratio is greater than 1.48, primary δ-ferrite forms initially and transforms to an austenite phase through peritectic reaction. As a result, the solidification structures contain about 4-10 vol% δ-ferrite among the austenitic dendrites. The content of δ-ferrite increases with an increase in the Creq/Nieq ratio of the strips. According to the tensile tests, the flow stress at 0.2% elongation and the UTS vary independently of the Creq/Nieq ratio, with the elongation tending to decrease for those strips with a Creq/Nieq ratio less than 1.48 or greater than 1.81. It appears that this is related to micro-shrinkage porosity in the austenitic structures and to interfacial tears in the γ/δ dendritic structures.
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U2 - 10.1080/13640461.1996.11819658
DO - 10.1080/13640461.1996.11819658
M3 - Article
VL - 9
SP - 175
EP - 181
JO - International Journal of Cast Metals Research
JF - International Journal of Cast Metals Research
SN - 1364-0461
IS - 3
ER -