#TITLE_ALTERNATIVE#

• Main Author: DYAH PAWESTRI (NIM :13104055); Pembimbing : Utama, Prof. Dr. Ir. Mardjono S, ANINDITA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/14928
• Institution: Institut Teknologi Bandung

This research work is focused on gas turbine blade material and manufacturing process, more spesifically on the microstructure. The properties of material are affected by its microstructure. Changes and damages in microstructure can deteriorate the properties of material. A sample is taken from a rejected gas turbine blade which experienced discolouration due to abnormal operating condition (i.e overheating). Microstructure observation is performed on the centre section of the blade which experienced overheating. For a comparison, another section is taken from the blade root which practically has no contact with high temperature condition. Initial microstructure of the blade contains gamma phase, gamma prime and carbides phase. <br /> <br /> <br /> The overheated blade shows an additional phase i.e sigma (TCP) phase. Moreover, the gamma prime phase has grown forming larger particles as well as a greater proportion <br /> <br /> <br /> of gamma prime. The microstructure of the blade resulted from investment casting on Inconel 731 (which chemical composition data is taken by EDS) and then was followed by two steps of aging process.