《Threedimensional numerical and experimental investigation on friction stir welding processes》.pdf

Available online at Acta Materialia 61 (2013) 2649–2661 /locate/actamat Three-dimensional numerical and experimental investigation on friction stir welding processes of ferritic stainless steel a b b a c Hoon-Hwe Cho , Sung-Tae Hong , Jae-Hun Roh , Hyun-Sik Choi , Suk Hoon Kang , Russell J. Steel d, Heung Nam Han a,⇑ a Department of Materials Science Engineering, Center for Iron Steel Research, RIAM, Seoul National University, Seoul 151-744, Republic of Korea b School of Mechanical Engineering, University of Ulsan, Ulsan 680-749, Republic of Korea c Nuclear Materials Research Division, Korea Atomic Energy Research Institute, Daejon 305-353, Republic of Korea d MegaStir Technologies, Provo, UT 84604, USA Received 15 November 2012; received in revised form 16 January 2013; accepted 22 January 2013 Available online 11 February 2013 Abstract A three-dimensional thermomechanical simulation of friction stir welding (FSW) processes is carried out for ferritic stainless steel by utilizing an Eulerian finite volume method under the steady state condition, and the simulation result is compared directly with both the measured temperature histories during FSW and the microstructural changes after FSW. Based on a viscoplastic self-consistent approach for polycrystal, the texture deve