SC Casting: Single Crystal Casting Process for Large Gas Turbine Blades

Directionally solidified (DS) and single crystal (SC)

components have been used in aircraft turbines for many years. They are also used in smaller turbines for landbased power generation. However, the adoption of SC technology for large land-based gas turbines is limited by the formation of grain defects in large and complex turbine blades, which is an impediment to the production of energy and cost efficient land based gas turbines. A new casting technology, developed by the Foundry Institute at RWTH Aachen University, overcomes the problem and allows significant reduction of grain defect formation while improving the quality of single crystal components.

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