Processing–structure–property correlation in nano-SiC-reinforced friction stir welded aluminum joints. (January 2016)

• Record Type: Journal Article
• Authors: Mohammadzadeh Jamalian, Hasan; Ramezani, Hadi; Ghobadi, Hasan; Ansari, Mohammad; Yari, Saeed; Besharati Givi, Mohammad Kazem
• Is Part Of: Journal of manufacturing processes. Volume 21(2016)
• Page Start: 180
• Page End: 189
• Publication Date: 2016-01
• Subjects: Aluminum alloys -- SiC reinforcement -- Friction stir welding -- Microstructure -- Mechanical properties; Production management -- Data processing -- Periodicals; Manufacturing processes -- Periodicals; Procestechnologie; Productietechniek; Production -- Gestion -- Informatique -- Périodiques; Fabrication -- Périodiques; Manufacturing processes; Production management -- Data processing; Periodicals; 670.5
• DOI: 10.1016/j.jmapro.2015.12.008
• Languages: English
• ISSNs: 1526-6125

Abstract

Highlights: Friction stir welded AA5086-H34 aluminum joints reinforced with nano-SiC-particles. Single-pass FSWed joints consisted of inhomogeneous distribution of SiC particles. Multi-pass FSW led to grain refinement and homogenous distribution of SiC particles. Hardness of FSWed joints with SiC enhanced by about 31% of the base metal. Multi-pass FSWed joints with SiC showed ductile fracture in the base metal. Abstract: In this work, friction stir welding (FSW) of AA5086-H34 aluminum with nano-sized SiC reinforcement is performed. The effects of traverse and rotational speeds and number of passes on microstructure, hardness, and tensile behavior of the FSWed joints are studied. Single-pass FSWed specimens containing reinforcements represented SiC particle-rich and SiC particle-free regions in grain refined Al-matrix within the stir zone (SZ), which could be affected by changing traverse and rotational speeds. Multi-pass FSW led to more grain refinement and homogenous distribution of SiC particles. Hardness measurement revealed that both single- and multi-pass FSW with SiC particles increased hardness values. Furthermore, tensile tests demonstrated that single-pass FSWed specimens with SiC possessed lower tensile strength and percentage of elongation in comparison to as-received aluminum and showed brittle fracture in the stir zone, while a remarkable increase in tensile properties was observed for multi-pass FSWed specimens with SiC particles and consequent ductile fracture in base metal.