Description:
Copper alloy is one of the most promising candidate materials for divertor heat sink owing to the extraordinary virtues. However, there will be highly challenging for CuCrZr alloy as heat sink material due to the harsh loading environment expected for the plasma facing components ( PFCs ) of future fusion reactors. In this study, explosive welding has become an effective method for manufacturing high-quality ODS-Cu ( Oxide dispersion strengthened copper ) / 316L stainless steel ( SS ) clad plate. Non-destructive testing results demonstrated there is a soundness bonding interface between ODS-Cu and 316L without any detectable defects and cracks. Optical microscopy and scanning electron microscope analysis displays the bonding interface contains no cavity and exhibits the typical wave bonding morphology. Moreover, tensile stress of the bonding interface is higher than that of the ODS-Cu parent metal and there is an increase in hardness for both sides near to the bonding interface. The helium leak testing results illustrate that the welded ODS-Cu / 316L is soundness without deformation or leakage in cyclic room temperature and high temperature. The results above prove that explosive welding method is a practicable way for manufacturing high-quality ODS-Cu / 316L clad plate that meets the design requirements, and can also provide important references for the engineering design of the China Fusion Engineering Test Reactor ( CFETR ) divertor heat sink