Evaluation of fracture behavior of recrystallized and aged high-Cr ODS ferritic steels

被引：8

作者：

Isselin, J. ^{[1
]}

Kasada, R. ^{[1
]}

Kimura, A. ^{[1
]}

Okuda, T. ^{[2
]}

Inoue, M. ^{[3
]}

Ukai, S. ^{[4
]}

Ohnuki, S. ^{[4
]}

Fujisawa, T. ^{[5
]}

Abe, F. ^{[6
]}

机构：

[1] Kyoto Univ, Inst Adv Energy, Kyoto 6110011, Japan

[2] KOBELCO Res Inst, Kobe, Hyogo 6512271, Japan

[3] Japan Atom Energy Agcy, Oarai, Ibaraki 3111393, Japan

[4] Hokkaido Univ, Kita Ku, Sapporo, Hokkaido 0608626, Japan

[5] Nagoya Univ, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[6] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2011年 / 417卷 / 1-3期

关键词：

MECHANICAL-PROPERTIES; CLADDINGS;

D O I：

10.1016/j.jnucmat.2010.12.061

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of aging on the ductile to brittle transition behavior of recrystallized high-Cr ODS ferritic steels were investigated using small-punch test technique. In order to reduce the anisotropy of microstructure in the as-received ODS steels, they were recrystallized after cold rolling. The ODS steel without Al hardly recrystallized at 1200 degrees C for 90 min, while the ODS steel with Al significantly recrystallized. Ductile-brittle transition curves were drawn for as received, recrystallized, and thermally aged (at 450 degrees C for 1440 h). Before aging, both materials had good impact properties with low ductile-brittle transition temperatures and high USEs. The ductile-brittle transition temperatures are not dependent of the grain size. The aging degraded their impact properties for ODS steel with Al. However, almost no degradation occurred for the ODS steel without Al. SEM observation showed an influence of the cold-rolling direction on the fracture behavior especially at low temperatures. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：185 / 188

页数：4

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