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Tesi etd-04102019-093108


Thesis type
Tesi di laurea magistrale
Author
FERRETTI, MATTEO
URN
etd-04102019-093108
Title
Comparison of fracture mechanics characteristics between Aluminium AlSi10Mg obtained by continuous casting or by Selective Laser Melting
Struttura
INGEGNERIA CIVILE E INDUSTRIALE
Corso di studi
INGEGNERIA AEROSPAZIALE
Commissione
relatore Prof. Chiarelli, Mario Rosario
tutor Ing. Montagni, Federico
Parole chiave
  • stampa 3D
  • leghe leggere
  • meccanica della frattura
  • Aluminium
  • fatigue crack growth
  • fatica
  • Selective Laser Melting
  • additive manufactoring
  • fracture mechanics
Data inizio appello
30/04/2019;
Consultabilità
parziale
Data di rilascio
30/04/2022
Riassunto analitico
The additive manufacturing technology is developing very quickly, however this type of process is characterised by an extreme variability of production parameters which have a considerable influence on the mechanical characteristics and in particular on the fracture mechanics property, which depend on the microstructure of material.
The material compared is the AlSi10Mg producted by SLM and by continuous casting. After the mechanical characterization the measurement of Fatigue Crack Growth Rates was carried out following the ASTM E647-15, from this tests are derived the coefficents of Paris equation.
Using the results of FGC Tests, of Tensile Test and with the analysis of porosity it was possible to draw conclusions on the fatigue resistence of material.
Finally the SEM analysis have permit to investigate the differences of microstructure between additive material and the casting one. The observation of fracture surface have given an important information s on the mode of progress of the crack, and on the role of the precipitatedes.
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