EFFECT OF HYDROGENATION ON THE FRACTURE MODE OF A REACTOR PRESSURE-VESSEL STEEL

被引：9
作者：
Taylor, N. [2 ]
Nykyforchyn, H. M. [1 ]
Tsyrulnyk, O. T. [1 ]
Student, O. Z. [1 ]
机构：
[1] Ukrainian Natl Acad Sci, Karpenko Physicomech Inst, Lvov, Ukraine
[2] European Commiss Joint Res Ctr, Inst Energy, Petten, Netherlands
来源：
MATERIALS SCIENCE | 2009年 / 45卷 / 05期
关键词：
reactor pressure-vessel steel; heat affecting zone under cladding; fracture toughness; subcritical crack growth; hydrogen embrittlement; intergranular fracture; INDUCED INTERGRANULAR FRACTURE;
D O I：
10.1007/s11003-010-9223-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The conditions for hydrogen-induced intergranular fracture in an artificially embrittled, low-alloy reactor pressure-vessel steel were investigated by using fracture toughness and stress-corrosion cracking tests. The specimens were taken from two locations: the heat-affected zone beneath the cladding and the base material directly below the heat-affected zone. A hydrogenating system allowed the tests to be carried out on both prehydrogenated specimens and with continuous hydrogenation in the course of the tests. In total, the results demonstrate a detrimental effect of hydrogen on the subcritical crack-growth resistance of both materials. At 120 degrees C (close to the upper shelf), it led to a lower energy ductile fracture mode and isolated events of transgranular fracture. At ambient temperature (in the ductile-to-brittle transition mode) some mixed intergranular and transgranular subcritical crack growth was observed.
引用
收藏
页码：613 / 625
页数：13
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