Creep properties of additive manufactured Ti-6242 alloys for aero-engine applications

This thesis investigates the enhancement of creep properties in laser-directed energy deposition welded (L-DED-w) Ti-6242 alloy components for aeroengine applications through different heat treatment processes. The primary focus is on understanding the influence of different heat treatments and cooling rates on the alpha lath thickness and asses the resulting mechanical properties of the material. A comprehensive literature review is conducted to identify existing heat treatments for improving creep resistance in titanium alloys. Experimental work involves compiling data from creep tests performed on L-DED-w Ti-6242 specimens subjected to various heat treatments. Microstructural analysis, including the measurement of alpha lath thickness, is conducted to correlate microstructural changes with creep behavior. Additionally, indentation testing is used to assess the mechanical properties of the heat-treated specimens.