List of Articles ریختگی

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  1 - The study of the Geomorphology and the Erosion in Alomoute river basin.
  SH GHAHRAMANI محمد رضا SARVATI
  The Alamute rood basin is located in central Alborz montain , and is one of the trinmings and the main lops of the Shahrood river and at last beside a basin of the Sefidrood vast basin in the east – north of Ghazvin. Each year 40 milliun  of the sediment of t More

  The Alamute rood basin is located in central Alborz montain , and is one of the trinmings and the main lops of the Shahrood river and at last beside a basin of the Sefidrood vast basin in the east – north of Ghazvin. Each year 40 milliun  of the sediment of this surface is separated and move to rivers flows and at last pour to Sefidrood dam and the surface of the below before the Sefidrood dam lake. At the bottom of the Allamute valley and the middle of the basin the markers that is related to Neogen period include sediment of evaporated and discontracted and also the makers of paleogen in the sowth hight and the makers of the kartase and infra kambrin in the North hight. The landforms that are the same on old conic. Erosion valley and the earthquicks specially in the Neogen and red and small sediment in konglomera in Neogen and also erosion cliff. In this way 16% of the rigeon that are in the makers of the Neogen have the hard and influenced of the forming of sediment. Paint this geomorphology that is influenced in the erosion and the sediment in the basin. The topography factor is the fint factor and the geometry and the kind ofter sond is the second and the coverage of the greens factor that is included the act changes of the farms for the herbivorons is the last factor of the erosion. 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
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  3 - The Effect of Intercritical Annealing Temperature on the Microstructure and Mechanical Properties of Dual-Phase Cast Steel
  Majid Abbasi Amene Vahidian
  In this research, a steel specimen with the new chemical compositions of 0.3 C, 2.5 Si, 1.8 Mn, and 0.5 Cr (wt. percent) was cast. Intercritical annealing (IA) heat treatment was performed at three temperatures(i.e., 825, 850, 875°C) on these samples in 26 minutes t More

  In this research, a steel specimen with the new chemical compositions of 0.3 C, 2.5 Si, 1.8 Mn, and 0.5 Cr (wt. percent) was cast. Intercritical annealing (IA) heat treatment was performed at three temperatures(i.e., 825, 850, 875°C) on these samples in 26 minutes to achieve the dual-phase steel. To determine the effect of intercritical annealing (IA) temperature, optical (OM) and scanning electron microscopy (SEM) microstructures were studied, as well as mechanical properties via hardness, micro-hardness, and tensile testing. The results indicated that intercritical annealing temperature increased, martensite volume, hardness, and yield strength increased. Also, the tensile strength initially increased and then decreased. However, the sample intercritical annealed at 850°C showed maximum tensile strength (1532 MPa), and the sample intercritical annealed at 825°C showed maximum elongation (18.52 %), and strength–elongation balance (UTS×UE). This dual-phase steel showed two stages of hardening, with the increase of martensite, the slope of the second stage decreased, and the strain at the beginning of the second stage of hardening was transferred to lower strains. Manuscript profile