List of Articles Structure modification

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  1 - Investigation of Numerical Modeling to Modify The Geometric Structure of Submerged Plates in The Management of Diversion Sediment to the Lateral Catchment Using CCHE 2D Software
  AMIN JOOBAND MOHAMMAD HOSSEIN PURMOHAMMADI
  Due to the expansion of the use of water resources, the use of water transfer structures is increasing day by day. Due to the sedimentation of sediments and their movement in water transfer structures, they are damaged. Therefore, scientists decided to use different met More

  Due to the expansion of the use of water resources, the use of water transfer structures is increasing day by day. Due to the sedimentation of sediments and their movement in water transfer structures, they are damaged. Therefore, scientists decided to use different methods to control sediments. One of these methods is the use of submerged plates. These plates act in a way that directs the sediments along the direction of the flow and reduces the sediment entering the reservoirs. In this study, we try to investigate the use of modified plate shapes by numerical modeling with CCHE 2D software in a laboratory model and its effect on the management of diversion sediment to the lateral catchment. In this study, we used 5 different shapes, one of which is a simple rectangular plate as a control that other plates have been compared with this plate without using submerged plates. Sediment to the lateral reservoir is effective. The present study investigated the simulation of a laboratory flume with a 60 degree reservoir and an average sediment particle size of 1.59 mm with four landings of 0.45, 0.55, 0.6 and 0.66. Manuscript profile
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  2 - Modification of Microstructure and Enhancing Mechanical Properties of as-cast AZ91 Magnesium alloy via Friction Stir Processing
  Hassan Jiryaei Sharahi Majid Pouranvari Mojtaba Movahedi
  10.30495/apme.2021.681639
  Magnesium alloys, as the lightest structural alloys, due to their high strength-to-weight ratio offer significant potential for improving energy efficiency of various transportation systems. This paper addresses the influence of friction stir processing (FSP) treatment More

  Magnesium alloys, as the lightest structural alloys, due to their high strength-to-weight ratio offer significant potential for improving energy efficiency of various transportation systems. This paper addresses the influence of friction stir processing (FSP) treatment on the microstructure and mechanical properties of cast AZ91 Mg alloy. It is demonstrated that FSP treatment enables elimination of dendritic structure, significant grain refining, break-up and partial dissolution of coarse β and formation of ultra-fine sub-micron Mg17Al12 particles. These microstructural modifications resulted in enhancement of mechanical properties in terms of tensile strength and energy absorption by 48% and 283%, respectively. It is shown that FSP treatment altered the failure mechanism of the alloy from brittle cleavage-dominant mode to ductile dimple-dominant mode which can increase the potential of Mg alloys to use in safety-critical application. Therefore, it can be concluded that FSP, as a process of sever plastic deformation at high temperature, has a great potential to tailor the microstructure and enhancing the mechanical properties of cast Mg alloys. Manuscript profile