Peculiarities of the structural-phase state of a brazing zone of dissimilar metal joints

10th International School-Conference on Materials for Extreme Environment: Development, Production and Application

Sevryukov, O.N.^1 ; Guseva, E.V.^1 ; Polyansky, A.A.^1

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, 31 Kashirskoe highway, Moscow

115409, Russia^1

关键词: Brazed joint;    Dissimilar metal joints;    First wall;    High temperature brazing;    International thermonuclear experimental reactor;    Structural-phase state;    Thermal impacts;    Working chambers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/130/1/012047/pdf
DOI  :  10.1088/1757-899X/130/1/012047

来源: IOP

【 摘 要 】

Annotation. The present work is devoted to the study of the structural-phase state of the brazed joints of dissimilar materials obtained by rapidly quenched filler metals before and after tests in the working conditions. The constructive elements of the International Thermonuclear Experimental Reactor (ITER) working chamber were selected: mock-ups of the first wall (a beryllium cladding joined with the heat-removing bronze by high-temperature brazing) and the divertor (a tungsten cladding with built-up copper, brazing of copper with bronze). An analysis of the investigated samples and the data on the structural-phase state of the brazed joints and its evolution as a result of a cyclic thermal impact was carried out by metallography and electron microscopy.