Processing of Al-Cu-Mg alloy by FSSP: Parametric analysis and the effect of cooling environment on microstructure evolution

• Published in: Materials letters Vol. 308; p. 131157
• Main Authors: Pouraliakbar, Hesam, Beygi, Reza, Fallah, Vahid, Hosseini Monazzah, Asal, Reza Jandaghi, Mohammad, Khalaj, Gholamreza, da Silva, Lucas F.M., Pavese, Matteo
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-02-2022; Elsevier BV
• Subjects: Al-Cu-Mg; Aluminum base alloys; Cooling effects; Copper; Dwell time; Evolution; Friction stir processing; Friction stir spot processing (FSSP); Magnesium; Materials science; Microstructure; Parametric analysis; Parametric statistics; Underwater; XRD; Friction stir spot processing (FSSP); XRD; Microstructure; Al-Cu-Mg; Underwater
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2021.131157

•Processing of the Al-Cu-Mg alloy was performed by (FSSP) in air and underwater.•Analyses were performed to explore the effect of variables on the microstructure.•It was insinuated that ω.t could better elucidate the stir zone refinement.•It was revealed that enhanced cooling was successfully inhibited grain growth.•Morphology, size, and volume fraction of second-phase particles were analyzed.
Treatment of Al-Cu-Mg alloy was performed by friction stir spot processing (FSSP). Parametric analysis on the microstructure modification by employing tool rotation speed (ω) and pin dwell-time (t) was performed on several samples processed in air and underwater. It was demonstrated that ω.t could better elucidate the stir zone refinement. Microscopy inspections pointed to the formation of a wide variety in the morphological and size evolution of second-phase particles in the air-treated samples as opposed to uniformly refined spherical particles in the underwater specimens.