Fabrication of Friction Stir Processed Al-Ni Particulate Composite and Its Impression Creep Behaviour | Zendy

S. Prakrathi | Zendy; Vineeth Krishna Parangodath | Zendy; K. Rajendra Udupa | Zendy; Udaya Bhat Kuruveri | Zendy

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Fabrication of Friction Stir Processed Al-Ni Particulate Composite and Its Impression Creep Behaviour

Author(s) -

S. Prakrathi,

Vineeth Krishna Parangodath,

K. Rajendra Udupa,

Udaya Bhat Kuruveri

Publication year - 2015

Publication title -

journal of composites

Language(s) - English

Resource type - Journals

eISSN - 2356-7252

pISSN - 2314-5978

DOI - 10.1155/2015/428630

Subject(s) - creep , friction stir processing , materials science , composite number , base metal , activation energy , composite material , metallurgy , base (topology) , rotational speed , impression , metal , microstructure , mechanical engineering , chemistry , mathematical analysis , mathematics , organic chemistry , welding , advertising , engineering , business

Nickel powders were troweled on roughened Al base plate using a friction tool madefrom tool steel. Friction stir processing (FSP) was carried out using a load of 8 kN and with atool rotation speed of 800 rpm and thus a surface composite was processed. Processed sampleswere characterized for revealing the microstructural features. SEM and XRD analysis revealedthe presence of fine Ni particles in the stir zone which lead to a significant increase in hardness. Using the “refined energy model,” the maximum temperature developed within the processedzone was estimated and found to be around 275°C. Impression creep behaviour was assessedon both the base metal and processed zone at the temperature of 30, 100, and 200°C. Creepcurves were generated and steady state creep rate (SSCR) values were found out to determine theactivation energy. It is observed that friction stirred regions record higher creep rate valuescompared to the base metal. Estimated activation energy is in the range of 6 to 16 kJ/mol. Activation energy is marginally lower in the base metal compared to friction stir processed region

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