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  • 1.
    Paidar, M.
    et al.
    Islamic Azad University, Department of Material Engineering, South Tehran Branch, Tehran, Iran (IRN).
    Vignesh, R. Vaira
    Department of Mechanical Engineering, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, India (IND).
    Khorram, A.
    K.N. Toosi University of Technology, Department of Mechanical Engineering, Tehran, Iran (IRN).
    Ojo, O. Oladimeji
    Federal University of Technology Akure, Department of Industrial and Production Engineering, Akure, PMB 704, Nigeria (NGA).
    Rasoulpouraghdam, Arash
    University West, Department of Engineering Science.
    Pustokhina, I
    I.M. Sechenov First Moscow State Medical University (Sechenov University), Russia (RUS).
    Dissimilar modified friction stir clinching of AA2024-AA6061 aluminum alloys: Effects of materials positioning2020In: Journal of Materials Research and Technology, ISSN 2238-7854, E-ISSN 2214-0697, Vol. 9, no 3, p. 6037-6047Article in journal (Refereed)
    Abstract [en]

    Modified friction stir clinching (MFSC) process was employed to joint dissimilar AA2024-T3 and AA6061-T6 Al sheets by interchanging the upper and the lower sheets during the joining process. The material flow, microstructure, tensile strength and fracture behaviors of the MFSC joints were studied. The results reveal that material positioning significantly affects the material flow behavior of the MFSC joint due to the disparity in the properties (flow stress) of the AA2024-T3 and AA6061-T6 Al alloys. The flow-induced hook path and proximity of hook tip to the geometric differential flow-induced defect (at the refilled end of the keyhole) are undesirable in the welded AA6061-T6/AA2024-T3 joint as compared to the AA2024-T3/AA6061-T6 joint. The microstructure (precipitate dispersion, dislocation density, and tangles), hardness distribution, and fracture morphology of the joints are altered by the material positioning-induced flow behavior. Improved tensile strength (97.88 MPa) is obtained in the AA2024-T3/AA6061-T6 joint as compared to the AA6061-T6/AA2024-T3 joint (86.65 MPa). (C) 2020 The Authors. Published by Elsevier B.V.

    Publisher's full text
  • 2.
    Taheri, Morteza
    et al.
    Department of Materials Engineering, South Tehran Branch, Islamic Azad University (IRN).
    Kazemi, Amirreza
    School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran (IRN).
    Gurusamy, P.
    Department of Mechanical Engineering, Chennai Institute of Technology, Chennai (IND).
    Rasoulpouraghdam, Arash
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Mohanavel, V.
    Centre for Materials Engineering and Regenerative Medicine, Bharath Institute of Higher Education and Research,Tamilnadu (IND).
    Ravichandran, M
    Department of Mechanical Engineering, K.Ramakrishnan College of Engineering, Trichy 621112, Tamilnadu (IND).
    Paidar, Moslem
    Department of Materials Engineering, South Tehran Branch, Islamic Azad University, Tehran (IRN).
    Features of hybrid laser-arc welding of GTD-111 superalloy compared to laser beam welding2022In: Materials letters (General ed.), ISSN 0167-577X, E-ISSN 1873-4979, Vol. 309, article id 131384Article in journal (Refereed)
    Abstract [en]

    In order to influence the electric arc as a heat source on the welding pool created by the laser, hybrid laser-arc welding (HLAW) and laser beam welding (LBW) methods were utilized for the welding of GTD-111 superalloy. The results showed that the HLAW method, due to the creation of more heat input, provides the conditions for the exit of gaseous pores created in the weld metal. The electric arc, located 5 mm from the laser beam, re-melted the solidified grains in the keyhole and provided the conditions for nonhomogeneous nucleation of the equiaxed grains. 

    Publisher's full text
  • 3.
    Zuo, Zhaoyang
    et al.
    School of Mechanical Engineering, Xijing University, Xi'an, Shaanxi (CHN).
    Taheri, Morteza
    Department of Materials Engineering, South Tehran Branch, Islamic Azad University, Tehran (IRN).
    Razavi, Mansour
    Department of Ceramic, Materials and Energy Research Center, Karaj, (IRN).
    Torkamany, Mohammad Javad
    Iranian National Center for Laser Science and Technology, Tehran (IRN).
    Rasoulpouraghdam, Arash
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Vignesh, R. Vaira
    epartment of Mechanical Engineering, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham (IND).
    Effect of magnetic field on tribological properties of IN718 superalloy coating produced by laser cladding on GTD-111 superalloy2022In: Vacuum, ISSN 0042-207X, E-ISSN 1879-2715, Vol. 203, article id 111311Article in journal (Refereed)
    Abstract [en]

    The aim of this study was to investigate the effect of a magnetic field on the wear behavior of an IN718 layer applied by laser cladding on GTD-111 superalloy. The results showed that by increasing the intensity of the magnetic induction field from 25 mT to 75 mT, the grains become finer and the area of the equiaxed grains increases. This increased the hardness and decreased the porosity of the cladding zone (CZ). However, the greatest magnetostrictive effect was produced at a magnetic intensity of 25 mT, which reduced the elastic modulus of the specimen. Under such conditions, the hardness ratio to the elastic modulus reached its maximum value (3.97), which resulted in increased wear resistance of the CZ. © 2022 Elsevier Ltd

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