Dynamic Tensile Properties of CuCrZr Alloy under Electro-Magnetic-Thermo-Mechanical Multifield Coupled Loading

CuCrZr alloy is one of the candidate materials for electromagnetic railgun rails. Obtaining its mechanical response under coupled electromagnetic-thermal-mechanical loading is of great significance for the engineering application of CuCrZr alloy. This paper proposes an electromagnetic ring expansion experimental technique assisted by external magnetic field, which stably achieves high strain rate loading above 10⁴/s without significantly increasing the induced current and Joule heating temperature rise in the metal sample ring. Based on this technique, the dynamic tensile properties of CuCrZr alloy under coupled electromagnetic-thermal-mechanical loading were investigated. The stress-strain curves and fracture strain of CuCrZr alloy under high current density, high strain rate, high temperature rise rate, and strong magnetic field environment were obtained. The relevant results provide important references for the application of CuCrZr alloy under multi-physics field coupling conditions.