Mechanical Properties According to Heat Treatment for Gas Turbine Blade Material
This work was studied for the changes of thermal properties on GTD-111 DS (Directional Solidification) gas turbine blade. In this study, gas turbine blades with 24,000~34,000 firing hours was used to get more effective result, gradually applied hot isostatic pressing (HIP) and post-heat treatment for these samples. In the latter steps, we observed changes of γ´ phase affected in material properties, and microhardness test was carried out to evaluate mechanical properties according to changes of γ´ fraction and shape. Experimental result shows, changes of γ´ fraction and shape were affected by HIP and post-heat treatment. And also mechanical properties changes such as micro-hardness related to γ´ phase. In this study, we explained changing transition of microstructure according to γ´ fraction distribution.
Young Won Chang, Nack J. Kim and Chong Soo Lee
M. Y. Kim et al., "Mechanical Properties According to Heat Treatment for Gas Turbine Blade Material", Advanced Materials Research, Vols. 26-28, pp. 209-212, 2007