Development of Materials Related to the 60T and 100T Magnets. 1997 NHMFL Report

摘要

In the past year, the effort in materials science related to the 60T and 100Tmagnets at Los Alamos have been concentrated in three areas: (1) development of a fabrication route for Cu-Ag wire in collaboration with Handy and Harman and IGC and (2) investigation of the mechanical properties of a variety of potential high strength high conductivity materials (3) selection of the reinforcement materials for the coils and development of a fabrication route for these materials. The selection of the conductors and reinforcement materials is based on their mechanical properties and electrical properties at cryogenic temperature (-196 deg C). The authors have taken the approach of trying to relate the properties both to design requirements and to the service life of magnet. Thus, the authors have given some consideration both to the role of the internal stresses developed during the fabrication on the elastic-plastic transition and on the mechanical and thermal stability of heavily drawn wires.