EFFECTS OF STACKING FAULT PRECIPITATION OF NbC ON HOT DEFORMATION OF AUSTENITIC STAINLESS STEEL.

Kazuhito Kamei, Yasuhiro Maehara, Yasuya Ohmori

研究成果: Article査読

抄録

Hot deformation of Nb-bearing austenitic stainless steel has been studied at temperatures from 823 to 1 173 K at an initial strain rate of 2. 1 multiplied by 10** minus 4 s** minus **1. Although yield strength of the solution-treated specimen was low, work hardening occurred at 1 023 to 1 123 K. A large ductility trough accompanied by intergranular ductile fracture is explained in terms of dynamic precipitation of NbC within the grains as well as on grain boundaries. In the aged specimen, yield strength was larger and work hardening was less significant. High strength is explained in terms of small grains formed by stacking faults where NbC particles precipitated. Above 1 123 K ductility of the solution-treated specimen increased with increasing deformation temperature, but that of the aged specimen was reduced. Ductility loss is ascribed to crack formation along coherent twin boundaries.

本文言語English
ページ(範囲)978-985
ページ数8
ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
71
8
出版ステータスPublished - 1985 6
外部発表はい

ASJC Scopus subject areas

  • Metals and Alloys

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