The erosive-wear response of five commercial ferrous-based cast alloys used for crushing was examined in this study. The micro- structures of the alloys were modified to elucidate the effect of microstructural feature...The erosive-wear response of five commercial ferrous-based cast alloys used for crushing was examined in this study. The micro- structures of the alloys were modified to elucidate the effect of microstructural features on wear. Erosion tests were conducted using alumi- num oxide particles （90-125μm） at 70 m/s and a normal impact angle （90°）. The worn surfaces were characterized by scanning electron microscopy and 3D non-contact laser profilometry. It is found that （i） a pearlitic structure exhibiting a greater plastic deformation than both bainitic and martensitic structures shows the greatest resistance to erosive wear at normal impact and （ii） the fracture characteristics of carbide and graphite particles plays an important role in determining the erosion wear behavior of the cast alloy matrices.展开更多
This paper offers preliminary work on system dynamics and Data mining tools. It tries to understand the dynamics of carrying out large-scale events, such as Hajj. The study looks at a large, recurring problem as a var...This paper offers preliminary work on system dynamics and Data mining tools. It tries to understand the dynamics of carrying out large-scale events, such as Hajj. The study looks at a large, recurring problem as a variable to consider, such as how the flow of people changes over time as well as how location interacts with placement. The predicted data is analyzed using Vensim PLE 32 modeling software, GIS Arc Map 10.2.1, and AnyLogic 7.3.1 software regarding the potential placement of temporal service points, taking into consideration the three dynamic constraints and behavioral aspects: a large population, limitation in time, and space. This research proposes appropriate data analyses to ensure the optimal positioning of the service points with limited time and space for large-scale events. The conceptual framework would be the output of this study. Knowledge may be added to the insights based on the technique.展开更多
基金Financial support by Kocaeli University-Scientific Research Projects Unit (KOU-BAP, 2014/028) is gratefully acknowledged
文摘The erosive-wear response of five commercial ferrous-based cast alloys used for crushing was examined in this study. The micro- structures of the alloys were modified to elucidate the effect of microstructural features on wear. Erosion tests were conducted using alumi- num oxide particles （90-125μm） at 70 m/s and a normal impact angle （90°）. The worn surfaces were characterized by scanning electron microscopy and 3D non-contact laser profilometry. It is found that （i） a pearlitic structure exhibiting a greater plastic deformation than both bainitic and martensitic structures shows the greatest resistance to erosive wear at normal impact and （ii） the fracture characteristics of carbide and graphite particles plays an important role in determining the erosion wear behavior of the cast alloy matrices.
文摘This paper offers preliminary work on system dynamics and Data mining tools. It tries to understand the dynamics of carrying out large-scale events, such as Hajj. The study looks at a large, recurring problem as a variable to consider, such as how the flow of people changes over time as well as how location interacts with placement. The predicted data is analyzed using Vensim PLE 32 modeling software, GIS Arc Map 10.2.1, and AnyLogic 7.3.1 software regarding the potential placement of temporal service points, taking into consideration the three dynamic constraints and behavioral aspects: a large population, limitation in time, and space. This research proposes appropriate data analyses to ensure the optimal positioning of the service points with limited time and space for large-scale events. The conceptual framework would be the output of this study. Knowledge may be added to the insights based on the technique.
