پديدآورندگان :
Abdollahzadeh Amin aabdollahzadeh@mail.kntu.ac.ir Advanced Materials and Nanotechnology Research Laboratory, Faculty of Materials Science and Engineering, K. N. Toosi University of Technology,Tehran,Iran; , Shokufar Ali Professor of materials science and engineering, Advanced Materials and Nanotechnology Research Laboratory, Faculty of Materials Science and Engineering, K. N. Toosi University of Technology, Tehran, Iran , Omidvar Hamid Associate professor of materials science and engineering, Faculty of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran , Haghgooyan Hamid Msc student of materials science and engineering, Faculty of Engineering, Islamic Azad University of Karaj, Karaj, Iran , Amini Mohammad Msc student of materials science and engineering, Faculty of Materials Science and Engineering, K. N. Toosi University of Technology, Tehran, Iran
كليدواژه :
Friction stir welding , magnesium alloy , SiC nano particles , grain size , precipitations.
چكيده فارسي :
The solid-state nature of the friction stir welding (FSW) process leads to several advantages over fusion welding methods as problems associated with cooling from the liquid phase are avoided. In this study, friction stir welding (FSW) technique was employed for joining AZ31 magnesium plates. Since SiC particles had been injected along the joint line, AZ31/SiC nano-composite was developed in the stir zone (SZ) and the effects of rotational and traveling speeds on grain size, cavities and precipitations of stir zone were investigated. Three rotational speeds 600,800, 1000 round per minute and four traveling speeds 25, 75, 125 and 175 millimeter per minute were used for welding of specimens. Microstructural studies showed that increase of traveling and rotational speeds, generally deceased grain size of composites. Also, cavities and Al3Mn precipitations were identified as main precipitations of composite. Due to apply plastic deformation during FSW, magnesium grains at TMAZ were observed in long shape. Moreover, Al3Mn precipitations at TMAZ were finer than those at BM.
