Retardation of Grain Growth in Al 3003 Nanocomposite Weldment Using ARB Filler Metal

• Published in: Metals and materials international Vol. 27; no. 7; pp. 2450 - 2460
• Main Authors: Ramkumar, K. R., Natarajan, S.
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Institute of Metals and Materials 01.07.2021; Springer Nature B.V; 대한금속·재료학회
• Subjects: Aluminum; Bend strength; Bonding strength; Characterization and Evaluation of Materials; Chemistry and Materials Science; Engineering Thermodynamics; Filler metals; Gas tungsten arc welding; Grain boundaries; Grain growth; Grain refinement; Heat and Mass Transfer; Load transfer; Machines; Magnetic Materials; Magnetism; Manufacturing; Materials Science; Metallic Materials; Nanocomposites; Nanoparticles; Particulates; Processes; Reinforcement; Roll bonding; Solid Mechanics; Titanium dioxide; Weldments; 재료공학; Impact; Bending; Nanocomposite; Al; TiO; ARB, GTAW
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-019-00597-5

This research demonstrates the feasibility of filler rod fabrication to develop nanocomposite weldment to enhance the joint strength via ARB technique. Al 3003 alloys were joined through GTAW by melting fabricated nanocomposite filler metal. TiO 2 nanoparticles were chosen as reinforcement from 0 to 3 wt%. Roll bonding is desired owing to the proper distribution of TiO 2 particles. SEM depicted the distribution of reinforcement particles in the grain boundaries. TEM disclosed the uniformity in particulates distribution, peening of dislocation and strain fields in 12 wt% TiO 2 reinforced nanocomposite weldment. EBSD portrayed the grain refinement occurred in the weld zone due to reinforcement addition. The improvement in impact and bending strength were due to excellent bonding between the Al and reinforcement particles and excellent load transfer ability provided by reinforcement particles. Graphic Abstract