Laser (LBW) and Electron Beam (EBW) welding have been used to produce seams on 2 mm thick plates of directionally solidified (DS) IN792 superalloy. For each welding technique a grid of samples were prepared by varying the pass speed (v) and keeping constant the other process parameters. The experiments were carried out at room temperature and with pre-heating (PHT) at 200 °C and 300 °C to find the best process conditions. The microstructural changes in molten zone (MZ) and heat affected zone (HAZ) were investigated finding that EBW guarantee a better quality and efficiency of the process without any macro defects. About the microstructure, the amount of ordered gamma' phase in the MZ is similar (about 25 %) for both welding techniques and quite lower than the value (70 %) of the original alloy.

Welding of IN792 DS Superalloy by High Energy Density Techniques

Angella G;Donnini R;
2017

Abstract

Laser (LBW) and Electron Beam (EBW) welding have been used to produce seams on 2 mm thick plates of directionally solidified (DS) IN792 superalloy. For each welding technique a grid of samples were prepared by varying the pass speed (v) and keeping constant the other process parameters. The experiments were carried out at room temperature and with pre-heating (PHT) at 200 °C and 300 °C to find the best process conditions. The microstructural changes in molten zone (MZ) and heat affected zone (HAZ) were investigated finding that EBW guarantee a better quality and efficiency of the process without any macro defects. About the microstructure, the amount of ordered gamma' phase in the MZ is similar (about 25 %) for both welding techniques and quite lower than the value (70 %) of the original alloy.
2017
Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia - ICMATE
superalloys
welding
laser
electron beam
microstructure
File in questo prodotto:
File Dimensione Formato  
prod_363598-doc_121320.pdf

solo utenti autorizzati

Descrizione: Pubblicazione
Tipologia: Versione Editoriale (PDF)
Dimensione 2.67 MB
Formato Adobe PDF
2.67 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/20.500.14243/326648
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? ND
social impact