INFLUENCE OF HELIUM ON HIGH-TEMPERATURE MECHANICAL-PROPERTIES OF AN AUSTENITIC STAINLESS-STEEL

被引：43

作者：

SAGUES, AA ^{[1
]}

SCHROEDER, H ^{[1
]}

KESTERNICH, W ^{[1
]}

ULLMAIER, H ^{[1
]}

机构：

[1] KFA JULICH GMBH,INST FESTKORPERFORSCH,D-5170 JULICH 1,FED REP GER

来源：

JOURNAL OF NUCLEAR MATERIALS | 1978年 / 78卷 / 02期

关键词：

D O I：

10.1016/0022-3115(78)90450-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Foil specimens of D1N 1.4970 austenitic stainless steel were cyclotron implanted to uniform helium concentrations up to 150 ppm. Subsequently, tensile and creep tests at different stress levels and temperatures between 600 and 800°C were performed and compared with the results from He-free control specimens. Whereas the latter exhibit transgranular ductile fracture, the implanted material breaks by intergranular failure with a corresponding reduction of the elongation to fracture values by factors between 3 and 6. These results and the TEM and SEM investigations of the microstructure are discussed by means of an embrittlement model which is based on the stress assisted nucleation and growth of helium filled grain boundary cavities. © 1978.

引用

页码：289 / 298

页数：10

共 26 条

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