Friction Stir Processing (FSP) has been demonstrated feasible to create local Metal Matrix Composites (MMCs) in light alloys matrix. In this research, local MMCs were produced contextually to the weld using Friction Stir Welding (FSW). SiC particles were added to AA7075 lap joints by creating a proper groove on the top surface of the bottom sheet. Different welds were produced with increasing number of tool passes. The effect of the multiple passes was investigated through shear tests, macro and micro observations, average grain size and microhardness measurements. The welded joints were compared to a reference weld produced with no reinforcements. It was found that poor mixing between matrix and reinforcement phase is obtained with one tool pass. On the contrary, proper mixing is obtained with three tool passes, resulting in an increase in the maximum load in shear tests of 50% with respect to the reference conditions.

Buffa, G., Campanella, D., Fratini, L. (2017). Enhancement of mechanical properties of FSWed AA7075 lap joints through in-situ fabrication of MMC. JOURNAL OF MANUFACTURING PROCESSES, 28(3), 422-427 [10.1016/j.jmapro.2017.04.008].

Enhancement of mechanical properties of FSWed AA7075 lap joints through in-situ fabrication of MMC

Buffa, Gianluca
;
Campanella, Davide;Fratini, Livan
2017-01-01

Abstract

Friction Stir Processing (FSP) has been demonstrated feasible to create local Metal Matrix Composites (MMCs) in light alloys matrix. In this research, local MMCs were produced contextually to the weld using Friction Stir Welding (FSW). SiC particles were added to AA7075 lap joints by creating a proper groove on the top surface of the bottom sheet. Different welds were produced with increasing number of tool passes. The effect of the multiple passes was investigated through shear tests, macro and micro observations, average grain size and microhardness measurements. The welded joints were compared to a reference weld produced with no reinforcements. It was found that poor mixing between matrix and reinforcement phase is obtained with one tool pass. On the contrary, proper mixing is obtained with three tool passes, resulting in an increase in the maximum load in shear tests of 50% with respect to the reference conditions.
2017
Settore ING-IND/16 - Tecnologie E Sistemi Di Lavorazione
Buffa, G., Campanella, D., Fratini, L. (2017). Enhancement of mechanical properties of FSWed AA7075 lap joints through in-situ fabrication of MMC. JOURNAL OF MANUFACTURING PROCESSES, 28(3), 422-427 [10.1016/j.jmapro.2017.04.008].
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S1526612517300804-main.pdf

Solo gestori archvio

Tipologia: Versione Editoriale
Dimensione 2.34 MB
Formato Adobe PDF
2.34 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/249817
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 12
social impact