Search for: dissimilar-materials
Article Engineering Letters ; Volume 26, Issue 1 , 2018 , Pages 193-202 ; 1816093X (ISSN) ; Wang, B ; Wrobel, L. C ; Chizari, M ; Sharif University of Technology
International Association of Engineers 2018
This research focuses on simulation of the dissimilar materials’ welding, stainless steel and mild steel, using finite element and experiment to enhance the method and better understand the transient temperature profiles and the stress distribution in a cladded pipe. The microstructural come as fenestrated and the computer results show that the temperature distribution in the modelled pipe is a function of the thermal conductivity of each weld metal as well as the distance away from the heat source. © 2018, International Association of Engineers. All rights reserved
Microstructure-property characterization of a friction-stir welded joint between AA5059 aluminum alloy and high density polyethylene, Article Materials Characterization ; Vol. 98, issue , December , 2014 , p. 73-82 ; Haghshenas, M ; Sahraeinejad, S ; Chen, J ; Shalchi, B ; Li, J ; Gerlich, A. P ; Sharif University of Technology
Aluminum alloys and high density polyethylene are utilized in a wide variety of industrial applications. In the present work the feasibility of friction stir butt welding between AA5059 alloy and high density polyethylene sheets is examined. The bonding mechanism, joint strength, and microhardness are considered in this study. Various welding parameters and tool alignment were investigated until sound joints were achieved by positioning approximately 85% of the rotating tool in the aluminum material on the advancing side (1.4 mm offset) at constant spindle speed and traverse speed of 710 rpm and 63 mm/min, respectively. The results indicate that AA5059 aluminum and high density polyethylene...
Article Lecture Notes in Engineering and Computer Science, 5 July 2017 through 7 July 2017 ; Volume 2230 , 2017 , Pages 861-866 ; 20780958 (ISSN) ; 9789881404831 (ISBN) ; Wang, B ; Wrobel, L. C ; Chizari, M ; Korsunsky, A. M ; Hunter, A ; Gelman, L ; Ao, S. I ; Hukins, D. WL ; Sharif University of Technology
Numerical modelling of the welding of dissimilar materials, stainless steel and mild steel, has been carried out using Abaqus together with Gas Metal Arc Weld (GMAW) in order to provide a better understanding of the transient temperature profiles and the stress distribution in a pipe. The results clearly show that the temperature distribution in the modelled pipe is a function of the thermal conductivity of each weld metal as well as the distance away from the heat source. Results also clearly show agreement with previous findings
Verification of stress model in dissimilar materials of varying cladded pipes using a similar cladded plate model, Article ASME 2020 Pressure Vessels and Piping Conference, PVP 2020, 3 August 2020 ; Volume 8 , October , 2020 ; Wang, B ; Chizari, M ; Wrobel, L ; Pressure Vessels and Piping Division ; Sharif University of Technology
American Society of Mechanical Engineers (ASME) 2020
This paper continues previous research performed by the authors on the modelling of dissimilar welded joints with varying clad thicknesses. This study aims to validate the use of a clad plate model as a replacement to the previous clad pipe model. To fulfill the hypothesis of the study, possible deformation or angular shrinkages occurring at weld joints have been simulated using a commercial finite element software. In parallel, angular shrinkages have been validated using the experimental data with the underlying concept of Gaussian transformation of plates into pipes. The welding of the two dissimilar materials has been carried out in-house with the aid of a Tungsten Arc weld with dynamic...
Friction stir welding joint of dissimilar materials between AZ31B magnesium and 6061 aluminum alloys: Microstructure studies and mechanical characterizations, Article Materials Characterization ; Volume 101 , March , 2015 , Pages 189-207 ; 10445803 (ISSN) ; Behnamian, Y ; Mostafaei, A ; Izadi, H ; Saeid, T ; Kokabi, A. H ; Gerlich, A. P ; Sharif University of Technology
Elsevier Inc 2015
Friction stir welding is an efficient manufacturing method for joining dissimilar alloys, which can dramatically reduce grain sizes and offer high mechanical joint efficiency. Lap FSW joints between dissimilar AZ31B and Al 6061 alloy sheets were made at various tool rotation and travel speeds. Rotation and travel speeds varied between 560-1400 r/min and 16-40 mm/min respectively, where the ratio between these parameters was such that nearly constant pitch distances were applied during welding. X-ray diffraction pattern (XRD), optical microscopy images (OM), electron probe microanalysis (EPMA) and scanning electron microscopy equipped with an energy-dispersive X-ray spectroscopy (SEM-EDS)...
Free vibration analysis of functionally graded cylindrical shells stiffened by uniformly and non-uniformly distributed ring stiffeners, Article ASME International Mechanical Engineering Congress and Exposition, Proceedings, 13 November 2009 through 19 November 2009 ; Volume 15 , 2010 , Pages 367-375 ; 9780791843888 (ISBN) ; Rahaei Fard, M ; Ahmadian, M. T ; Movahhedy, M. R ; Sharif University of Technology
American Society of Mechanical Engineers (ASME)
Free vibration analysis of a transversely stiffened circular thin hollow cylinder made of functionally graded materials (FGMs) is analytically evaluated. Functionally graded materials are inhomogeneous composites which are usually made from a mixture of metal and ceramic. The gradient compositional variation of the constituents from one surface to the other provides an elegant solution to the problem of high transverse shear stresses induced when two dissimilar materials with large differences in material properties are bonded. In this paper, application of an FGM made of two different materials is investigated by applying Ritz method. While cylinder is assumed to be thin, strain energy...
Structural analysis of stiffened FGM thick walled cylinders by application of a new cylindrical super element, Article World Academy of Science, Engineering and Technology ; Volume 58 , 2009 , Pages 116-121 ; 2010376X (ISSN) ; Ahmadian, M. T ; Sharif University of Technology
Structural behavior of ring stiffened thick walled cylinders made of functionally graded materials (FGMs) is investigated in this paper. Functionally graded materials are inhomogeneous composites which are usually made from a mixture of metal and ceramic. The gradient compositional variation of the constituents from one surface to the other provides an elegant solution to the problem of high transverse shear stresses that are induced when two dissimilar materials with large differences in material properties are bonded. FGM formation of the cylinder is modeled by power-law exponent and the variation of characteristics is supposed to be in radial direction. A finite element formulation is...
Evolution of microstructures and mechanical properties in similar and dissimilar friction stir welding of AA5086 and AA6061, Article Materials Science and Engineering A ; Volume 528, Issue 28 , 2011 , Pages 8071-8083 ; 09215093 (ISSN) ; Serajzadeh, S ; Kokabi, A. H ; Sharif University of Technology
In this work, thermo-mechanical behavior and microstructural evolution in similar and dissimilar friction stir welding of AA6061-T6 and AA5086-O have been investigated. Firstly, the thermo-mechanical behaviors of materials during similar and dissimilar FSW operations have been predicted using three-dimensional finite element software, ABAQUS, then, the mechanical properties and the developed microstructures within the welded samples have been studied with the aid of experimental observations and model predictions. It is found that different strengthening mechanisms in AA5086 and AA6061 result in complex behaviors in hardness of the welded cross section where the hardness variation in similar...
Article ASME International Mechanical Engineering Congress and Exposition, Proceedings, 13 November 2009 through 19 November 2009 ; Volume 15 , 2010 , Pages 359-365 ; 9780791843888 (ISBN) ; Moeini, S. A ; Kahrobaiyan, M. H ; Ahmadian, M. T ; Sharif University of Technology
Functionally graded materials (FGMs) are inhomogeneous composites which are usually made of a mixture of metals and ceramics. Properties of these kinds of materials vary continuously and smoothly from a ceramic surface to a metallic surface in a specified direction of the structure. The gradient compositional variation of the constituents from one surface to the other provides an elegant solution to the problem of high transverse shear stresses that are induced when two dissimilar materials with large differences in material properties are bonded. FGMs have extracted much attention as advanced structural materials in recent years. In this paper, free vibration of a rotating FGM cantilever...
Friction-stir lap-joining of aluminium-magnesium/poly-methyl-methacrylate hybrid structures: thermo-mechanical modelling and experimental feasibility study, Article Science and Technology of Welding and Joining ; Volume 23, Issue 1 , 2018 , Pages 35-49 ; 13621718 (ISSN) ; Khodabakhshi, F ; Simchi, A ; Sharif University of Technology
Taylor and Francis Ltd 2018
In this research, the feasibility of friction-stir welding (FSW) for dissimilar lap-joining of an aluminium-magnesium alloy (AA5058) and poly-methyl-methacrylate sheets to attain sound and defect-free joints was examined. The inter-mixing flow patterns between the metal and polymer counterparts during FSW were predicted by employing three-dimensional finite element models. It is shown that the bonding mechanism between the dissimilar materials is mechanical interlocking at the interface which controls the joint strength depending on the processing parameters. The most suitable dissimilar lap-joining regarding microstructural soundness is attained at w= 1600 rev min−1 and v = 25 mm min−1....
A new procedure for the fabrication of dissimilar joints through injection of colloidal nanoparticles during friction stir processing: Proof concept for AA6062/PMMA joints, Article Journal of Manufacturing Processes ; Volume 49 , 2020 , Pages 335-343 ; Simchi, A ; Sharif University of Technology
Elsevier Ltd 2020
We present a new semi-solid state procedure for efficient joining of dissimilar materials. The process called fed friction stir processing (FFSP) and works based on in-situ injection of colloidal nanoparticles in the welding line during processing. To present the efficiency of the process, friction stir welding of AA6062 aluminum alloy and poly(methyl methacrylate) (PMMA) through injection of alumina nanoparticles is presented. Microstructural features and mechanical characteristics of the weldments are elaborated. It is shown that in-situ feeding of the alumina nanoparticles during FFSP changes the thermo-mechanical regimes of the bonding zone and decreases the thickness of interaction...