New Technology for Optimizing Melting Pool and Regulating Grain Formation in Laser Surface Remelting of Single Crystal Superalloys

摘要

Nickel-base superalloys are materials of choice for manufacturing hot-section components in gas turbines due to their superior mechanical properties at high temperatures [1]. For maintaining and improving the properties, this kind of materials are often cast into single crystal form. Nevertheless, severe service conditions of high temperature and high pressure, often cause tip and platform damages.