Methodology for Investing Failures of Turbine Blade

  Dr. Sushila Rani

Turbine blades are made of super-alloys with different cooling methods such as internal air channels, boundary layer cooling and thermal barrier coatings (TBC) to withstand high temperature of hot gases. In 1940, the development of super-alloys and new production methods in subsequent years increases the capability of turbine blades to withstand high temperatures. Modern turbine blades are manufactured mainly by Ni-based super-alloys. Turbine blades are subjected to very strenuous environments inside a gas turbine. Turbine Blades of a gas turbine engine are very prone to damage from flying debris; moreover they also sustain thermal stresses and local overheating on their surface of gases that are coming out from combustion chambers. They face high temperatures, high stresses, and a potentially high vibration environment inside turbine. All these factors can lead to blade failure, resulting in catastrophic failure of turbine. In this research work various methodologies/ techniques have been discussed, which are employed to investigate the failure in turbine blade.

Keywords- Fractography, Metallography, Scanning electron microscopy, X-ray diffraction technique

Unique Identification Number - IJEDR1801128
Page Number(s) - 747-751
Pubished in - Volume 6 | Issue 1 | March 2018
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Dr. Sushila Rani,   "Methodology for Investing Failures of Turbine Blade", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.6, Issue 1, pp.747-751, March 2018, Available at :http://www.ijedr.org/papers/IJEDR1801128.pdf