| KEYWORD |
Evaluation of residual stresses and their mitigation in a Nickel alloy obtained via Additive manufacturing
keywords ADDITIVE MANUFACTURING, THERMAL TREATMENTS
Reference persons EMILIO BASSINI
Thesis type EXPERIMENTAL, LABORATORY TESTS
Description The manufacture and processing of high-volume gamma-strengthened nickel alloys is often very complex, and this becomes even more apparent when these materials are produced using additive manufacturing. The level of residual stress is often such that the materials fracture when heated, undergoing a phenomenon known as strain ageing cracking. In this work, a nickel alloy with low printability is heat treated through special stress relieving treatments that gradually reduce its internal residual stresses. This process will be evaluated both in terms of residual stresses and microstructural evolution with the aim of defining, for each metallurgical state, the relationship between the stress state and the resulting microstructure. The study of the microstructure will make use of state-of-the-art characterisation techniques such as SEM, FESEM, EBSD and TEM.
Required skills Knowledge of the basics of materials science, with emphasis on nickel alloy metallurgy. familiarity with some key concepts such as “dislocations,” microstructure, grain size, heat treatments, and recrystallization is required
Deadline 31/10/2024
PROPONI LA TUA CANDIDATURA