Peculiar Features of Thermal Aging and Degradation of Rapidly Quenched Stainless Steels under High-Temperature Exposures

被引：0
|
作者：
Shulga, A. V. [1 ]
机构：
[1] Natl Res Nucl Univ MEPhI, Moscow Engn Phys Inst, Kashirskoe Sh 31, Moscow 115409, Russia
来源：
PHYSICS OF ATOMIC NUCLEI | 2017年 / 80卷 / 10期
关键词：
rapidly quenched stainless steels; mechanical properties; microstructure; boron; carbon; autoradiography; MECHANICAL-PROPERTIES; RETAINED AUSTENITE; TENSILE; CARBON;
D O I：
10.1134/S1063778817100088
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
This article presents the results of comparative studies of mechanical properties and microstructure of nuclear fuel tubes and semifinished stainless steel items fabricated by consolidation of rapidly quenched powders and by conventional technology after high-temperature exposures at 600 and 700A degrees C. Tensile tests of nuclear fuel tube ring specimens of stainless austenitic steel of grade AISI 316 and ferritic-martensitic steel are performed at room temperature. The microstructure and distribution of carbon and boron are analyzed by metallography and autoradiography in nuclear fuel tubes and semifinished items. Rapidly quenched powders of the considered steels are obtained by the plasma rotating electrode process. Positive influence of consolidation of rapidly quenched powders on mechanical properties after high-temperature aging is confirmed. The correlation between homogeneous distribution of carbon and boron and mechanical properties of the considered steel is determined. The effects of thermal aging and degradation of the considered steels are determined at 600A degrees C and 700A degrees C, respectively.
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页码：1574 / 1579
页数：6
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