Thermo-mechanical and metallurgical aspects in friction stir processing of AZ31 Mg alloy—A numerical and experimental investigation

Albakri, A.N.; Mansoor, Bilal; Nassar, Hani; Khraisheh, Marwan

doi:10.1016/j.jmatprotec.2012.09.015

Cited by 72 publications

(25 citation statements)

References 34 publications

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“…The average grain size of the different weld zones were found to be equal to 8.17 μm for the base metal, 10.45 μm for the heat affected zone, 11.47 μm for the thermo-mechanically affected zone and 12.13 μm for the stir zone. These observations are in line with observations of the microstructure of friction stir welded AZ31B reported by [23,25,39]. EBSD scans from three weld zones, SZ, TMAZ advancing side (AS) and TMAZ retreating side (RS) are shown in Fig.…”

Section: Microstructural Observations and Textural Analysissupporting

confidence: 91%

Microstructural observations and tensile fracture behavior of FSW twin roll cast AZ31 Mg sheets

Dorbane

Ayoub

Mansoor

et al. 2016

Materials Science and Engineering: A

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Section: Microstructural Observations and Textural Analysissupporting

confidence: 91%

Microstructural observations and tensile fracture behavior of FSW twin roll cast AZ31 Mg sheets

Dorbane

Ayoub

Mansoor

et al. 2016

Materials Science and Engineering: A

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“…Equation (8) shows that the heat is generated by friction at the tool/workpiece interface and plastic deformation. This relation is obtained from Nandan et al [14].…”

Section: Heat Generationmentioning

confidence: 99%

“…For example, over the last years, Al-Badour et al [7] built a 3D localized FE model in which the workpiece and the tool are modeled using Eulerian and Lagrangian formulation, respectively, to predict likely conditions that result in defect generation during FSW process. Albakri et al [8] developed a CFD-based fully coupled 3D thermomechanical model to better understand the effect of process parameters on temperature, material flow, and strain rate during the FSP. Pan et al [9] presented a novel 3D SPH model for FSW process that could simulate the dynamics of interfaces, the large deformation of the material, and the material's strain and temperature histories without utilizing complicated tracking schemes.…”

Section: Introductionmentioning

confidence: 99%

Thermal modeling of friction stir welding of stainless steel 304L

Darvazi

Iranmanesh

2014

Int J Adv Manuf Technol

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This paper presents a numerical model, based on the displacement of one point of the material flow relative to a fixed reference point, in order to formulate the heat generation during friction stir process and thereby calculate the temperature difference between advancing and retreating sides. This model considers frictional heating dependent on both the temperature and the velocity of the tool, as well as heat generation due to plastic deformation dependent on temperature, and assumes that friction heat at high temperature was replaced by heat generation due to plastic deformation. The heat generated by plastic strain energy dissipation in thermomechanically affected zone is calculated by a new technique, and the convection heat transfer coefficient and the sticking state parameter are considered as a function of temperature. Finally, the thermal equations are solved using a nonlinear finite element code ABAQUS. The numerical results correctly showed the asymmetric nature of temperature distributed at different sides of the weld line which have good agreement with experimental data that are presented in the literature.

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“…They pointed out that tensile strength of the FSWed AZ31 plate could get 93% that of the base material when process parameters were selected as 1500 rpm rotating speed, 90 mm/min translation speed and 150 N welding pressure. Albakri et al (2013) investigated FSW of AZ31 Mg alloy by numerical modeling and experiments. They developed a 3D CFD model to determine the effects of FSW process parameters on temperature, material flow and strain rate.…”

Section: Introductionmentioning

confidence: 99%

Friction Stir Welding of AZ31 Magnesium Alloys - A Numerical and Experimental Study

Serіndağ

Kıral

2017

Lat. Am. j. solids struct.

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In this paper, weldability of magnesium alloys by friction stir welding (FSW) method which is difficult to join by the fusion welding have been investigated experimentally and numerically. To this end, the connection of magnesium alloys was performed using different welding parameters. AZ31 Mg-alloy plates were friction stir welded at rotation speed of 1200 rev/min and translational speeds of 80,100,120,140 mm/min. Temperature evolution in the weld zone during welding was measured by using embedded K-type thermocouples. The temperature measurements on both advancing and retreading sides were performed by ten thermocouples. Tensile and Vickers hardness tests were conducted to evaluate the mechanical properties and the hardness distribution on the weld, respectively. During FSW, heat is generated by the friction and plastic deformation. Knowledge of the temperature distribution is requisite since mechanical properties and microstructure are substantially affected by the heat generation. It was observed that the heat generated during the FSW process was increasing and the grain structure was refined as the translational speed was decreasing. In the finite element analyses, modeling of the FSW process were carried out by ANSYS software to determine the temperature and stress distributions in the welded joint during FSW. An APDL (ANSYS Parametric Design Language) code was developed to simulate FSW process. Transient nonlinear finite element analyses were performed at two stages which the first step is thermal analysis which heat transfer from the pin and shoulder to the plates was modeled and the second is the structural analysis which the temperature data obtained from the thermal analysis in the first stage is used.

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Thermo-mechanical and metallurgical aspects in friction stir processing of AZ31 Mg alloy—A numerical and experimental investigation

Cited by 72 publications

References 34 publications

Microstructural observations and tensile fracture behavior of FSW twin roll cast AZ31 Mg sheets

Microstructural observations and tensile fracture behavior of FSW twin roll cast AZ31 Mg sheets

Thermal modeling of friction stir welding of stainless steel 304L

Friction Stir Welding of AZ31 Magnesium Alloys - A Numerical and Experimental Study

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