Showing 3 results for Anbarzadeh
A. Anbarzadeh, H. Sabet,
Volume 3, Issue 1 (Journal OF Welding Science and Technology of Iran 2017)
Abstract
The aim of this study is investigation of TLP variables on microstructure and mechanical properties of Al2024 to Ti-6Al-4V bonding for TLP joint. For this purpose, the sheets were prepared with dimension of 130×32×3 mm from Ti-6Al-4V and Al2024 alloys and 50µm thick Sn-5.3Ag-4.2Bi foil as interlayer. Sn-5.3Ag-4.2Bi foil prepared with dimension of 32×25 mm. Two alloys was joint together by process of Successive stage Transient Liquid Phase (S-TLP). This process is contains two stages. The first one is Transient Liquid Phase (TLP) of Ti-6Al-4V and the second stage is diffusion bonding of Al2024 to Ti-6Al-4V. In the first stage, TLP process was used for joining of Ti-6Al-4V to Ti-6Al-4V samples. This process carried out under argon gas at 2 atmosphere and at 620 °C. After the end of first stage, the samples were broken from the joint region and then, the obtained surface was jointed to Al2024 with new interlayer. In the second stage, that is soldering, the samples were placed in furnace under argon gas at 2 atmosphere and at 453 °C. Maximum tensile strength of diffusion bonding was about 62 Mpa.
M. E. Kazemian, F. Mohsenifar, R. Ghanbarzadeh,
Volume 3, Issue 1 (Journal OF Welding Science and Technology of Iran 2017)
Abstract
In this paper, laser beam welding of a rectangular piece of steel was simulated using Fluent software. Physical properties of analytical field was constant and its changes with temperature was ignored. In the present work, effect of tool speed and laser power on temperature distribution of workpiece surface and different deeps in the plane of symmetry and also maximum of temperature and depth of penetration were investigated. Using a macro code, geometry generation and meshing of the analytical field by helping required geometric parameters were provided for software. Moreover, laser radiation power was exerted by writing an UDF in the fluent software. In this case, it was assumed that the workpiece is stationary and gaussian thermal source model defined in UDF moves with the intended speed. Results show that at a constant power, maximum temperature of the workpiece decreases with increasing heat source speed, moreover, in this case, gradient of temperature in front of the workpiece and behind of it, increases and decreases respectively. It is found that the temperature in the depth of the workpiece increases with increasing the power.
A. Anbarzadeh, H. Sabet, A.r. Geranmayeh,
Volume 8, Issue 1 (Journal OF Welding Science and Technology 2022)
Abstract
In this study, to bond AA2024 and AA6061 alloys to each other, three elements (Sn, Zn and Ga) were considered as interlayer elements in terms of atomic diffusion depth in the base metal and storage at 453°C for 2 days, 10 hours, 210 minutes, and 30 seconds that they were examined for atomic diffusion modeling. Finally, the two alloys were connected at a temperature of 453°C in a furnace environment under a vacuum of 7.5×10-13 Torr under a transient liquid phase process. The effect of changing the thickness of the interlayer on the connection of the two alloys are examined with practical tests such as metallography, SEM, the distribution map of the elements, hardness test, the linear scan of the elements at the joint, and tensile strength test in two modes, 1: investigating the effect of changing the thickness of the interlayer on strength, and 2: investigating the change in joint strength by increasing sample retention time in the furnace. As the thickness of the interlayer increases (from 20 to 70 μm), the bond strength decreases. The maximum tensile strength of joint with the 20 μm thickness Sn-5.3Ag-4.6Bi interlayer is 52 MPa.
