EFFECTS OF NEUTRON-IRRADIATION ON HYDROGEN-INDUCED INTERGRANULAR FRACTURE IN A LOW ACTIVATION 9-PERCENT CR-2-PERCENT W STEEL

被引：15

作者：

KIMURA, A

KAYANO, H

NARUI, M

机构：

[1] The Oarai Branch, Institute for Materials Research, Tohoku University, Oarai, Ibaraki

来源：

JOURNAL OF NUCLEAR MATERIALS | 1991年 / 179卷

关键词：

D O I：

10.1016/0022-3115(91)90194-C

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hydrogen charging changed the fracture mode in tensile tests at room temperature from ductile shear rupture to intergranular cracking, resulting in a considerable reduction of the ductility of a low activation 9%Cr-2%W martensitic steel. The critical hydrogen charging current density required to cause hydrogen-induced intergranular cracking was reduced by neutron irradiation, suggesting that neutron irradiation enhanced hydrogen-induced intergranular cracking. This hydrogen-induced intergranular cracking was not caused by irreversible damage due to hydrogen charging, since it disappeared after aging at room temperature. The recovery rate of the fracture mode from intergranular cracking to ductile rupture during aging at room temperature was reduced by irradiation. A mechanism of irradiation-induced enhancement of hydrogen embrittlement in a low activation 9%Cr-2%W martensitic steel is proposed.

引用

页码：737 / 740

页数：4

共 7 条

[1] EMBRITTLEMENT OF A 5 PCT NICKEL HIGH-STRENGTH STEEL BY IMPURITIES AND THEIR EFFECTS ON HYDROGEN-INDUCED CRACKING [J].

BRIANT, CL ;

FENG, HC ;

MCMAHON, CJ .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1978, 9 (05) :625-633

[2]

Caskey M, 1985, HYDROGEN DEGRADATION, P822

[3]

CHANDLER WT, ASTM STP, V543, P170

[4]

JOHNSON HH, 1958, T AM I MIN MET ENG, V212, P528

[5]

MCBREEN J, 1967, P C FUNDAMENTAL ASPE, P51

[6] MICROCHEMICAL EVOLUTION IN PCA UNDER DUAL ION IRRADIATION [J].

SEKIMURA, N ;

KAWANISHI, H ;

ISHINO, S .

JOURNAL OF NUCLEAR MATERIALS, 1985, 133 (AUG) :525-529

[7]

TAKAHASHI H, 1986, 13TH INT S RAD IND C, P955

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