Linear Friction Welding (LFW) is a solid state welding process used to joint bulk components. In the paper, an experimental and numerical study on LFW of Ti6Al4V titanium alloy is presented. A laboratory designed LFW machine has been used to weld the specimens with different contact pressure and oscillation frequency. The joint microstructure has been experimentally observed with SEM and EDS. A dedicated numerical model, able to predict temperature, strain and strain rate distribution as well as the phase volume fraction evolution, has been utilized to predict the final microstructure in the welded parts. It was found that complete transformation of the alpha phase into beta phase occurs during the process. After cool down, martensitic structure is obtained at the core of the weld due to high temperatures reached during the process and high cooling rates occurring at the end of the reciprocating motion. Microhardness measurements confirmed increased hardness in the Weld Zone with respect to the parent material

Buffa, G., Campanella, D., Cammalleri, M., Ducato, A., Astarita, A., Squillace, A., et al. (2015). Experimental and Numerical Analysis of Microstructure Evolution during Linear Friction Welding of Ti6Al4V. PROCEDIA MANUFACTURING, 1, 429-441 [10.1016/j.promfg.2015.09.053].

Experimental and Numerical Analysis of Microstructure Evolution during Linear Friction Welding of Ti6Al4V

BUFFA, Gianluca;CAMPANELLA, Davide;CAMMALLERI, Marco;DUCATO, Antonino;FRATINI, Livan
2015-01-01

Abstract

Linear Friction Welding (LFW) is a solid state welding process used to joint bulk components. In the paper, an experimental and numerical study on LFW of Ti6Al4V titanium alloy is presented. A laboratory designed LFW machine has been used to weld the specimens with different contact pressure and oscillation frequency. The joint microstructure has been experimentally observed with SEM and EDS. A dedicated numerical model, able to predict temperature, strain and strain rate distribution as well as the phase volume fraction evolution, has been utilized to predict the final microstructure in the welded parts. It was found that complete transformation of the alpha phase into beta phase occurs during the process. After cool down, martensitic structure is obtained at the core of the weld due to high temperatures reached during the process and high cooling rates occurring at the end of the reciprocating motion. Microhardness measurements confirmed increased hardness in the Weld Zone with respect to the parent material
2015
43RD NORTH AMERICAN MANUFACTURING RESEARCH CONFERENCE, NAMRC 43
Charlotte - United States
8-12 June 2015
Buffa, G., Campanella, D., Cammalleri, M., Ducato, A., Astarita, A., Squillace, A., et al. (2015). Experimental and Numerical Analysis of Microstructure Evolution during Linear Friction Welding of Ti6Al4V. PROCEDIA MANUFACTURING, 1, 429-441 [10.1016/j.promfg.2015.09.053].
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S2351978915010537-main.pdf

accesso aperto

Tipologia: Versione Editoriale
Dimensione 6.29 MB
Formato Adobe PDF
6.29 MB Adobe PDF Visualizza/Apri

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/10447/234019
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 8
social impact