Dislocation Substructures in Hot-deformed Ni-based Alloys. Simulation for Structure Evolution of Hot-worked Austenite in Low Carbon Steels.
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- Adachi Yoshitaka
- Corporate Research and Development Laboratories, Sumitomo Metal Industries, Ltd.
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- Tomida Toshiro
- Corporate Research and Development Laboratories, Sumitomo Metal Industries, Ltd.
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- Hinotani Shigeharu
- Corporate Research and Development Laboratories, Sumitomo Metal Industries, Ltd.
抄録
The dislocation substructure in compressively deformed fcc 70Ni-30Fe and 67Ni-30Fe-3Ti alloys was investigated to understand or model microstructural evolution in austenite of low carbon steels during hot deformation. These Ni-based alloys are expected to show similar deformation characteristics to austenitic steels because of similar stacking fault energy. The deformation substructure depended in particular on deformation temperature. Below 700°C a heavy deformation (70% reduction) introduced microbands, while above 800°C it produced equiaxed dislocation cell structures with some partially recrystallized austenite grains. Crystallographic misorientation in microband structures tended to be larger than that in cell structures at the fixed strain and temperature. Preexisting precipitates effectively suppressed the growth of austenite grains recrystallized after deformation, which resulted in macroscopically homogeneous dislocation substructures consisting of microbands. The temperature dependence of dislocation substructures may closely relate to the mechanism of diffusional transformation to ferrite at very low temperature 500°C through strain assisted transformation in low carbon steels.
収録刊行物
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- ISIJ International
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ISIJ International 40 (Suppl), S194-S198, 2000
一般社団法人 日本鉄鋼協会
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詳細情報 詳細情報について
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- CRID
- 1390282681427767808
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- NII論文ID
- 130000780303
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- ISSN
- 13475460
- 09151559
- http://id.crossref.org/issn/09151559
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可