Structure and Properties of High-Temperature Multilayer Hybrid Material Based on Vanadium Alloy and Stainless Steel
- PDF / 3,595,123 Bytes
- 13 Pages / 593.972 x 792 pts Page_size
- 44 Downloads / 187 Views
ON
VANADIUM alloys (V-Ti-Cr type) are advanced structural materials for energy applications due to their excellent thermal conductivity as well as a good high-temperature tensile strength and a high-temperature creep resistance.[1–13] These alloys have various advantages, such as high short-term and long-term strength at temperatures up to 1073 K (800 C) and high radiation stability over austenitic and ferritic-martensitic steels.[14–18] However, high solubility of oxygen and nitrogen in vanadium alloys at temperatures above 673 K (400 C) may be a limiting factor for using them in some applications.[19–25] One of the possible applications of vanadium alloys could be a cladding tube for fast nuclear reactors operating in a liquid-metal coolant in high-temperature applications. However, unprotected vanadium alloys will degrade under such conditions. Therefore, vanadium alloys (despite their heat resistance and radiation TATYANA A. NECHAYKINA, SERGEY A. NIKULIN, ANDREY B. ROZHNOV, VLADIMIR M. KHATKEVICH, and STANISLAV O. ROGACHEV are with The National University of Science and Technology ’’MISIS’’, Leninsky pr. 4, Moscow, Russia 119049. Contact e-mails: [email protected], [email protected] Manuscript submitted June 9, 2016. Article published online January 4, 2017 1330—VOLUME 48A, MARCH 2017
stability) still have not been used as structural materials at high temperatures. To prevent vanadium alloys embrittlement upon interaction with oxygen and nitrogen, it is required to protect them with corrosion-resistant materials, for example, through creation of multilayer compositions. In our research, we propose a three-layer structural material based on a high-temperature vanadium alloy protected from both sides with ferritic or ferritic-martensitic stainless steel. Such a three-layer material can be obtained by a joint plastic deformation. High technological ductility of vanadium alloy and ferritic steel allows to produce thin-walled items (tubes and sheets) by plastic deformation for using them as nuclear reactor core components. The compound of dissimilar materials, which occurs with the formation of an intermediate layer between them, is an important aspect for understanding how to create strong multilayered materials. Also, new data about microstructure of the transition area required for fine tuning of manufacturing modes. In this three-layer composite material, vanadium alloys such as V-(4-10) pct Ti-(4-6) pct Cr provide a high long-term high-temperature strength, and a steel protective layer provides a high corrosion resistance in various media (liquid metals, water, and steam). This type of material can be used for fuel claddings of
METALLURGICAL AND MATERIALS TRANSACTIONS A
liquid-metal fast nuclear reactors working in a closed nuclear fuel cycle. The bonding quality of the components must be characterized by good adhesion between their absence of microvoids and surface or internal cracks. At the same time, it is necessary to obtain a predetermined ratio of protective layer thicknesses and desired microstructure. A mu
Data Loading...
