The aim of this study is to evaluate the possibility of using the Linear Friction Welding (LFW) technique to produce sound joints on a 2124Al/25vol.%SiCP composite. The MMC joints were subjected to microstructural and mechanical characterization, including hardness, tensile and fatigue tests, without any post weld heat treatment. The microstructural analyses showed substantially defect-free joints, with a uniform particle distribution in the central zone and a relevant plastic flow of the aluminium matrix alloy. The hardness decrease in the welded zone was approximately 10% in respect to the base material. The joint efficiency was higher than 80%, both in respect to the ultimate tensile strength and fatigue strength at 107 cycles. S-N probability curves were calculated using the maximum likelihood method. Generally, the fracture occurred in the Thermo-Mechanically Affected Zone (TMAZ), with a relevant reduction in the elongation to failure
F. Rotundo, L. Ceschini, Alessandro Morri, T-S. Jun, A. M. Korsunsky (2010). Mechanical and microstructural characterization of 2124Al/25vol%SiCp joints obtained by linear friction welding (LFW). COMPOSITES. PART A: APPLIED SCIENCE AND MANUFACTURING, 41, Issue 9, 1028-1037 [10.1016/j.compositesa.2010.03.009].
Mechanical and microstructural characterization of 2124Al/25vol%SiCp joints obtained by linear friction welding (LFW)
ROTUNDO, FABIO;CESCHINI, LORELLA;MORRI, ALESSANDRO;
2010
Abstract
The aim of this study is to evaluate the possibility of using the Linear Friction Welding (LFW) technique to produce sound joints on a 2124Al/25vol.%SiCP composite. The MMC joints were subjected to microstructural and mechanical characterization, including hardness, tensile and fatigue tests, without any post weld heat treatment. The microstructural analyses showed substantially defect-free joints, with a uniform particle distribution in the central zone and a relevant plastic flow of the aluminium matrix alloy. The hardness decrease in the welded zone was approximately 10% in respect to the base material. The joint efficiency was higher than 80%, both in respect to the ultimate tensile strength and fatigue strength at 107 cycles. S-N probability curves were calculated using the maximum likelihood method. Generally, the fracture occurred in the Thermo-Mechanically Affected Zone (TMAZ), with a relevant reduction in the elongation to failureI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
