Influence of technological defects and neutron irradiation on the mechanical properties of single-crystal molybdenum pipes

被引：1

作者：

Kinev E.A. ^{[1
]}

Barsanova S.V. ^{[1
]}

Pastukhov V.I. ^{[1
]}

机构：

[1] Institute of Nuclear Materials, P.O. Box 29, Zarechny, Sverdlovsk oblast

来源：

Inorganic Materials: Applied Research | 2016年 / 7卷 / 05期

关键词：

mechanical testing; microstructure; neutron irradiation; single-crystal molybdenum; technological defects;

D O I：

10.1134/S2075113316050117

中图分类号：

学科分类号：

摘要：

The state of single-crystal molybdenum pipes irradiated in an IVV-2M reactor at the peak temperature of 1400°C for 1700 and 3200 h by the fast neutron fluence of 3 × 1020 and 5 × 1020 n cm–2, respectively, is investigated. The aim is to analyze the shape and surface state of pipes, the metallography of the structure, the short-time mechanical properties, and the character of destruction of the ring pipe specimen under testing. Radiation strengthening of molybdenum single-crystal is not registered. The strength parameters of the irradiated material are the level of initial values. The plastic properties of samples approach zero under room temperature tests. When the temperature is above 250°C, the total tensile strain of the sample exceeds 15% and ductile fracture with neck thinning to zero takes place. The perfect structure of an irradiated single crystal is preserved. Technological defects such as microcracks on the inner surface of pipes may act as stress concentrators. © 2016, Pleiades Publishing, Ltd.

引用

页码：708 / 712

页数：4

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