Friction Stir Processing: An Operational Method to Improve Ductility in Pure Copper

Abstract:

mproving ductility in metals using friction stir processing (FSP) is a challenging effort and is made by means of a rotating tool inserted in a work piece providing heat transfer and plastic deformation. In this investigation, improving ductility during FSP was determined as a purpose and the microstructure and mechanical properties of nugget zone were investigated during friction stir processing (FSP) of pure copper. Ductility was measured using tensile elongations at a temperature of 20 °C. By varying the traverse speed from 40 to 100 mm/min at rotation speeds of 300 and 600 rpm, the ultrafine grain microstructure was achieved .Defects were observed in rotational speed of 300 rpm. By increasing traverse speed at constant rotational speed of 600 rpm grain size of the nugget zone decreased and ductility increased. Achievable ductility was limited by cavity formation due to lower heat input and deformation in samples with defects.

• Periodical: Advanced Materials Research (Volume 818)
• Pages: 14-19
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.818.14
• Online since: September 2013
• Authors: Vahid Rezazadeh, Ali Sharbatzadeh, Ali Hosseinzadeh, Amir Safari, Salar Salahi
• Keywords: Ductility, Friction Stir Processing (FSP), Plastic Deformation, Pure Copper

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