Borts B. Physical and technological foundations of the dissimilar metals joining in solid phase by method of hot rolling in vacuum

Object: the processes of the boundary properties formation of composite materials for the nuclear and space techniques through high-temperature rolling in vacuum. The purpose: development of physical and technological bases of determining the conditions of deliberate changes in physical-mechanical properties and structural characteristics of the boundaries of solid-state connection of dissimilar materials, which are obtained by hot rolling in a vacuum, to create a new structural materials for nuclear science and engineering and for other industries. Methods: optical and electron microscopy, measurements of macro-, micro-and nanohardness, acoustic emission, microanalysis, ultrasonic flaw detection and radiography. Results: using the method of hot rolling in vacuum a number of strong and durable composite materials was obtained. Theoretically established and experimentally confirmed the dependence of the strength limit of the connection of dissimilar metals on the value of their plasticity. It was determined that the tensile strength of the boundaries of dissimilar metals is much higher than the tensile strength of less durable metall. This boundary of two dissimilar materials connection which are produced by hot rolling in a vacuum, is a new material that is based on the plastic deformation and displacement, allowing the mixing of the surface atomic layers of dissimilar materials. Field of application: physics of solid state, radiation materials science