Abstract
Superplasticity and microstructural change during deformation of a 25Cr-7Ni-3Mo α/γ duplex stainless steel having a microduplex structure have been studied. The specimen of microduplex structure with fine α and γ grain sizes (approximately 1 μm) showed high strain rate superplasticity at 1273 K. Elongation over 1700% was obtained at a strain rate of 1.7 × 10-2S-1. Even at 1.7 × 10-1S-1 elongation was near 1000%. α/α boundaries were low angle ones before the superplastic deformation and were changed to high angle ones by dynamic recrystallization in the early stage of deformation. During deformation up to 1300% elongation after the recrystallization of the α phase, dislocations were scarcely observed in the whole of the specimen. It was concluded that the grain boundary sliding is a predominant deformation mode during superplastic flow in the present steel and the role of dynamic recrystallization is to make the structure suitable for the grain boundary sliding in the early stage of deformation. The mechanism of dynamic recrystallization was briefly discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 878-887 |
| Number of pages | 10 |
| Journal | Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals |
| Volume | 54 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Jan 1 1990 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry
Cite this
High strain rate superplasticity and role of dynamic recrystallization in duplex stainless steel. / Tsuzaki, Kaneaki; Matsuyama, Hirohisa; Nagao, Mamoru; Maki, Tadashi.
In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 54, No. 8, 01.01.1990, p. 878-887.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - High strain rate superplasticity and role of dynamic recrystallization in duplex stainless steel
AU - Tsuzaki, Kaneaki
AU - Matsuyama, Hirohisa
AU - Nagao, Mamoru
AU - Maki, Tadashi
PY - 1990/1/1
Y1 - 1990/1/1
N2 - Superplasticity and microstructural change during deformation of a 25Cr-7Ni-3Mo α/γ duplex stainless steel having a microduplex structure have been studied. The specimen of microduplex structure with fine α and γ grain sizes (approximately 1 μm) showed high strain rate superplasticity at 1273 K. Elongation over 1700% was obtained at a strain rate of 1.7 × 10-2S-1. Even at 1.7 × 10-1S-1 elongation was near 1000%. α/α boundaries were low angle ones before the superplastic deformation and were changed to high angle ones by dynamic recrystallization in the early stage of deformation. During deformation up to 1300% elongation after the recrystallization of the α phase, dislocations were scarcely observed in the whole of the specimen. It was concluded that the grain boundary sliding is a predominant deformation mode during superplastic flow in the present steel and the role of dynamic recrystallization is to make the structure suitable for the grain boundary sliding in the early stage of deformation. The mechanism of dynamic recrystallization was briefly discussed.
AB - Superplasticity and microstructural change during deformation of a 25Cr-7Ni-3Mo α/γ duplex stainless steel having a microduplex structure have been studied. The specimen of microduplex structure with fine α and γ grain sizes (approximately 1 μm) showed high strain rate superplasticity at 1273 K. Elongation over 1700% was obtained at a strain rate of 1.7 × 10-2S-1. Even at 1.7 × 10-1S-1 elongation was near 1000%. α/α boundaries were low angle ones before the superplastic deformation and were changed to high angle ones by dynamic recrystallization in the early stage of deformation. During deformation up to 1300% elongation after the recrystallization of the α phase, dislocations were scarcely observed in the whole of the specimen. It was concluded that the grain boundary sliding is a predominant deformation mode during superplastic flow in the present steel and the role of dynamic recrystallization is to make the structure suitable for the grain boundary sliding in the early stage of deformation. The mechanism of dynamic recrystallization was briefly discussed.
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UR - http://www.scopus.com/inward/citedby.url?scp=0025476882&partnerID=8YFLogxK
U2 - 10.2320/jinstmet1952.54.8_878
DO - 10.2320/jinstmet1952.54.8_878
M3 - Article
VL - 54
SP - 878
EP - 887
JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
SN - 0021-4876
IS - 8
ER -