INVESTIGADORES
CHAPETTI mirco Daniel
artículos
Título:
Fatigue life of laser additive manufacturing repaired steel component
Autor/es:
MOLINA, CARLOS A.; ARAUJO, ABIGAIL; BELL, CURTIS; MENDEZ, PATRICIO; CHAPETTI, MIRCO D.
Revista:
ENGINEERING FRACTURE MECHANICS
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2021 vol. 241
ISSN:
0013-7944
Resumen:
Laser cladding is an additive manufacturing process which is spreading as a valuable resource for manufacturing and repairing mechanical components that are subjected to intense wear. Advantages over conventional welding include a much lower heat input and minimal dilution, also surpassing metal spraying due to the resulting metallurgical bond. In this paper, the effect of laser cladding on the fatigue life of a 70 mm diameter component of wrought quenched and tempered AISI-SAE 4140H is assessed, along with full characterization of defects, hardness and residual stress distributions. Additionally, a theoretical fatigue crack propagation prediction model based on a fracture mechanics approach is demonstrated to provide acceptable estimated fatigue lives, and shows how the most influential process variables affect these results.
