Authors:
Guney Mert Bilgin (TUSAS Engine Industries Inc., Turkey),
Zuhal Kutlu (TUSAS Engine Industries Inc., Turkey)
Abstract:
High strength and improved elevated temperature properties along with their low density make ?-TiAl alloys attractive for aircraft engines. In this study, Ti-48Al-2Cr-2Nb samples were produced by electron beam melting (EBM) method. As-built EBM ?-TiAl mechanical properties significantly differ from those of the parts produced by conventional methods due to several issues including microstructural instabilities, porosity and residual stresses. Therefore, a subsequent heat treatment was found to be vital to eliminate those issues generated from the nature of the EBM layered process. The Ti-48Al-2Cr-2Nb alloy typically contains two main phases, ?-TiAl as the matrix and a2-Ti3Al with various morphologies depending on the type of the processing and heat treatment history. The present study was conducted to characterize the microstructure, high temperature tensile strength behavior of EBM manufactured Ti-48Al-2Cr-2Nb samples in the as-built, HIP’ed and heat-treated conditions within the purpose of utilizing this alloy for structural aerospace applications.
DOI:
https://doi.org/10.59499/WP225372164