Pore Formation In Aluminum Castings: Theoretical Calculations And The Extrinsic Effect Of Entrained Surface Oxide Films,
2017
University of North Florida
Pore Formation In Aluminum Castings: Theoretical Calculations And The Extrinsic Effect Of Entrained Surface Oxide Films, Pedram Yousefian
UNF Graduate Theses and Dissertations
Aluminum alloy castings are being integrated increasingly into automotive and aerospace assemblies due to their extraordinary properties, especially high strength-to-density ratio. To produce high quality castings, it is necessary to understand the mechanisms of the formation of defects, specifically pores and inclusion, in aluminum. There have been numerous studies on pore formation during solidification which lead to hot tearing and/or reduction in mechanical properties. However, a comprehensive study that correlates pore formation theory with in situ observations and modeling assumptions from the literature as well as experimental observations in not available. The present study is motivated to fill this gap. …
Influence Of Concrete Compressive Strength On Transfer And Development Lengths Of Prestressed Concrete,
2016
University of Arkansas, Fayetteville
Influence Of Concrete Compressive Strength On Transfer And Development Lengths Of Prestressed Concrete, Alberto Teodoro Ramirez-Garcia
Graduate Theses and Dissertations
This research examines the relationship between concrete compressive strength and strand bond. The goal of this research was to develop an equation that relates strand bond to concrete compressive strength at strand release (approximately 1 day of age) and at 28 days of age, and those equations are presented in this investigation. Strand bond is assessed by measuring the transfer length and development length for prestressed beams cast in the laboratory. In the U.S., strand bond is predicted using transfer length and development length equations provided by the American Concrete Institute (ACI-318) Building Code and American Association of State and …
Finite Element Simulation Of Pzt-Aided Interrogation Of Composite Laminates Exhibiting Damage,
2016
The British University in Egypt
Finite Element Simulation Of Pzt-Aided Interrogation Of Composite Laminates Exhibiting Damage, Amany Micheal, Yehia Bahei-El-Din
Centre for Advanced Materials
Piezoelectricity has proved effective in capturing changes in structures caused by various damage mechanisms. In one approach, piezoelectric wafer active sensors (PWAS) are mounted on the surface of the host structure and utilized as both actuators and sensors to interrogate the structure and monitor its health. This is achieved by subjecting the PWAS to a transient electric pulse and reading the resulting voltage. Changes in the stiffness of the substrate due to structural damage affect the response of the PWAS, which could be correlated to integrity of the structure. Applying this technique to fibrous composite laminates encounters particular challenges due …
Thin Film Concrete Coatings,
2016
University of Kentucky
Thin Film Concrete Coatings, Bobby W. Meade, Danny Wells, Theodore Hopwood Ii, Sudhir Palle
Kentucky Transportation Center Research Report
KTC researchers obtained eight types of concrete coatings to assess their performance and resistance to chloride penetration. Researchers evaluated eight of the systems in the field and seven in the laboratory. In the field, coatings were applied to a bridge pier that had suffered degradation and chloride contamination. This site will undergo long term monitoring in order to thoroughly evaluate the coating systems. Adhesion of all products in both field and laboratory application was sufficient to provide a durable coating, and ranged from approximately 500 psi to 1,600 psi. Researchers also tested color and gloss changes, which are early indicators …
Failure Mechanism Of Woven Roving Fabric/Vinyl Ester Composites In Freeze–Thaw Saline Environment,
2016
University of Dayton
Failure Mechanism Of Woven Roving Fabric/Vinyl Ester Composites In Freeze–Thaw Saline Environment, Elias Anis Toubia, Sadra Emami, Donald A. Klosterman
Civil and Environmental Engineering and Engineering Mechanics Faculty Publications
This experimental study investigates the degradation mechanisms of a glass fiber-reinforced plastic material commonly used in civil engineering applications. A substantial reduction in tensile, shear, and compression properties was observed after 100 days of freeze–thaw cycling in saline environment (-20°C to 20°C). Non-destructive inspection techniques were progressively conducted on unexposed (ambient condition) and exposed (conditioned) specimens. The dynamic mechanical analysis showed permanent decrease in storage modulus that was attributed to physical degradation of the polymer and/or fiber–matrix interface. This indicated the formation of internal cracks inside the exposed glass fiber-reinforced plastic laminate. The 3D X-ray tomography identified preferred damage sites …
Effect Of Preparation Technology On Arc Erosion Resistance Of Mgo/Cu Contact Materials,
2016
Henan University of Science and Technology
Effect Of Preparation Technology On Arc Erosion Resistance Of Mgo/Cu Contact Materials, Xiuhua Guo, Kexing Song, Yanmin Zhang, Xuebin Zhang, Jianxin Gao
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Thermodynamic Calculation Of The Liquidus Surface Projection Of Multi-Component Aluminum Alloys,
2016
Advanced Materials Institute, Shandong Academy of Sciences
Thermodynamic Calculation Of The Liquidus Surface Projection Of Multi-Component Aluminum Alloys, Jingrui Zhao, Yong Du, Lijun Zhang, Jixue Zhou, Yuansheng Yang
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Study On Impact And Friction Properties Of Za45si3cu Alloy,
2016
Baise University
Study On Impact And Friction Properties Of Za45si3cu Alloy, Weihe Shi
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Microstructures And Properties Of Sintered Cu–Mos2/Cu Functional Gradient Materials,
2016
Henan University of Science and Technology
Microstructures And Properties Of Sintered Cu–Mos2/Cu Functional Gradient Materials, Aiqin Wang
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
(Alpha + Gamma) Ultrafine Duplex Structure Formation In Twophase Stainless Steel By High-Pressure Torsion And Annealing,
2016
Ritsumeikan University
(Alpha + Gamma) Ultrafine Duplex Structure Formation In Twophase Stainless Steel By High-Pressure Torsion And Annealing, Mie Ota, Kei Ameyama, Daiki Nanya, Sanjay Kumar Vajpai
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Study On The Impact Abrasive Wear Of New Super-High Manganese Steel,
2016
Henan University of Science and Technology
Study On The Impact Abrasive Wear Of New Super-High Manganese Steel, Wenyan Wang
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Simulation Of Superplastic Forming Of Circular Edge-Welded Envelopes,
2016
Ufa State University of Oil & Petroleum
Simulation Of Superplastic Forming Of Circular Edge-Welded Envelopes, Olga Tulupova
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Constitutive Equation Of Compression For 38mnv Micro-Alloyed Steel,
2016
Shanghai Research Institute of Materials; Guangxi University
Constitutive Equation Of Compression For 38mnv Micro-Alloyed Steel, Jun Hu, Jianmin Zeng
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Numerical Modeling And Seismic Assessment Of Smart Isolation System For High-Speed Railway Rc Bridge Subjected To Near-Field Ground Motions,
2016
Yangzhou University
Numerical Modeling And Seismic Assessment Of Smart Isolation System For High-Speed Railway Rc Bridge Subjected To Near-Field Ground Motions, Lingkun Chen
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Characterization Of Thermal Deformation Behavior Of A Novel Tial Alloy,
2016
Harbin Institute of Technology
Characterization Of Thermal Deformation Behavior Of A Novel Tial Alloy, Xiaopeng Wang, Fantao Kong, Qin Su, Yu Zhang, Yuyong Chen
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Effect Of Rare Earth On The Niobium Carbide Dissolution And Precipitation In Low-Carbon Microalloy Steels,
2016
Inner Mongolia University of Science and Technology
Effect Of Rare Earth On The Niobium Carbide Dissolution And Precipitation In Low-Carbon Microalloy Steels, Haiyan Wang, Huiping Ren, Xueyun Gao
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Microstructure And Mechanical Property Of Tic/Vc Multilayered Coatings From First Principles,
2016
Chongqing University
Microstructure And Mechanical Property Of Tic/Vc Multilayered Coatings From First Principles, Tianmo Liu
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Hot Deformation Behaviors And Processing Maps Of Al–Mg–In Alloy,
2016
Guangxi Uni'versity
Hot Deformation Behaviors And Processing Maps Of Al–Mg–In Alloy, Yanjun Zhao
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Numerical Simulation Of Directional Solidification Of A Nickel-Based Superalloy With Applied Electric Current,
2016
Institute of Metal Research, Chinese Academy of Sciences
Numerical Simulation Of Directional Solidification Of A Nickel-Based Superalloy With Applied Electric Current, Xiaohui Feng, Yingju Li, Yuansheng Yang
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Influence Of Die Construction On Equivalent Strain, Microstructures, And Tensile Properties Of 5052 Aluminum Alloy Processed By Groove Pressing,
2016
Fujian Chuanzheng Communications College
Influence Of Die Construction On Equivalent Strain, Microstructures, And Tensile Properties Of 5052 Aluminum Alloy Processed By Groove Pressing, Kai-Huai Yang, Jian-Min Zeng, Wen-Zhe Chen, You-Ting Huang
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
