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Online since: January 2014
Authors: Yu Zhong Wu, Fang Huang, Qian Liu
As a result the development of heavy forging field is one the factors representing the level of nation’s industry and national defense.
It is difficult to forge titanium alloy, because of narrow forging temperature and large shape-changing resistance of titanium alloy, it would cause easily non-uniform tissue and unstable property, even cracking.
From the aspects of forging strain, damage factor and required loading we compared how different fillet radius of V-shaped anvil edge influence on forging quality.
Furthermore, we also report here how fillet radius of V-shaped anvil edge affect forging quality on different diameters of heavy long-axis forgings in squaring process.
The damage factor is the minimum for Φ600mm axis ingots and V-shaped anvil fillet radius 100mm, for Φ1000mm and Φ1200mm ingots with 50mm anvil fillet radius.
It is difficult to forge titanium alloy, because of narrow forging temperature and large shape-changing resistance of titanium alloy, it would cause easily non-uniform tissue and unstable property, even cracking.
From the aspects of forging strain, damage factor and required loading we compared how different fillet radius of V-shaped anvil edge influence on forging quality.
Furthermore, we also report here how fillet radius of V-shaped anvil edge affect forging quality on different diameters of heavy long-axis forgings in squaring process.
The damage factor is the minimum for Φ600mm axis ingots and V-shaped anvil fillet radius 100mm, for Φ1000mm and Φ1200mm ingots with 50mm anvil fillet radius.
Online since: May 2012
Authors: Kun Peng Gu, Cheng Qi Wang
Introduction
Sulfate corrosion is one of the key factors for durability of concrete structure[1-4].
There are potential expansion property test method(P method) and soaked corrosion resistance test method(K method) in the GB/T 749-2008, ”test method for determing capability of resisting sulfate corrode of cement”.
Chemical composition and physical-mechanical characteristic of all kinds of cement are presented respectively in Table 1 and Table 2.
More over, cement is the key factor to sulfate resistance of cementitious material single doped fly ash which can’t improve sulfate resistance of cementitious material always[8].
Kumar Mehta: Concrete Structure, Properties and Materials(Prentice Hall prss, America,1991)
There are potential expansion property test method(P method) and soaked corrosion resistance test method(K method) in the GB/T 749-2008, ”test method for determing capability of resisting sulfate corrode of cement”.
Chemical composition and physical-mechanical characteristic of all kinds of cement are presented respectively in Table 1 and Table 2.
More over, cement is the key factor to sulfate resistance of cementitious material single doped fly ash which can’t improve sulfate resistance of cementitious material always[8].
Kumar Mehta: Concrete Structure, Properties and Materials(Prentice Hall prss, America,1991)
Online since: February 2004
Authors: R. Chaim, Arturo Domínguez-Rodríguez, C. Lorenzo, Angela Gallardo-López, D. Gómez-García
Plastic deformation of yttria tetragonal zirconia polycrystals (YTZP) has been the
objective of utmost interest owing to the exceptional properties such as superplasticity exhibited for
grain sizes in the submicrometer range.
In theory, this property is expected to improve with decrease in the average grain size.
Results Mechanical tests.
There is no evidence for dislocation activity, neither change in the form factor in the specimens.
Atomic migration of charged species is remarkably affected by these local electric fields; hereupon the anomalous mass transport along them.
In theory, this property is expected to improve with decrease in the average grain size.
Results Mechanical tests.
There is no evidence for dislocation activity, neither change in the form factor in the specimens.
Atomic migration of charged species is remarkably affected by these local electric fields; hereupon the anomalous mass transport along them.
Online since: October 2023
Authors: Pedro Francisco Mayuet, Lucía Rodríguez-Parada, Sergio De la Rosa, Miguel Ángel Pardo-Vicente, José Ramón Méndez-Salgueiro
Accordingly, it is observed that the generation of nature-based textures can be an added value to improve all emotional and sustainability factors affecting street furniture.
Research is even focusing on adding specific properties, such as translucency to implement sensory properties [19], that already exist with conventional manufacturing processes.
Finally, a study was carried out in order to parameterise the relief measurement with respect to the relief measurement parameter of the Blender program, relating it to the microgeometric properties of the average surface roughness (Sa, Sz).
The prototypes generated in both materials, figure 8 b) and c), obtain similar properties, although the texture is more toned down in the light recycled PLA material.
Additive manufacturing of PLA structures using fused deposition modelling: Effect of process parameters on mechanical properties and their optimal selection.
Research is even focusing on adding specific properties, such as translucency to implement sensory properties [19], that already exist with conventional manufacturing processes.
Finally, a study was carried out in order to parameterise the relief measurement with respect to the relief measurement parameter of the Blender program, relating it to the microgeometric properties of the average surface roughness (Sa, Sz).
The prototypes generated in both materials, figure 8 b) and c), obtain similar properties, although the texture is more toned down in the light recycled PLA material.
Additive manufacturing of PLA structures using fused deposition modelling: Effect of process parameters on mechanical properties and their optimal selection.
Online since: August 2017
Authors: S. Rajendran, R. Premila, K. Kesavan
Controlling of mechanical properties can be achieved through the blending technique [12, 13].
Recently PEMA has drawn the attention of researchers by virtue of its promising properties such as very good mechanical and electrochemical properties compared with PMMA.
The good mechanical properties of PEMA make it suitable for lithium battery application.
The VTF relation describes the transport properties in a viscous matrix.
[11] J.E.Weston, B.C.H.Steele, Effects of inert fillers on the mechanical and electrochemical properties of lithium salt-poly(ethylene oxide) polymer electrolytes, Solid State Ionics 7 (1982) 75-79
Recently PEMA has drawn the attention of researchers by virtue of its promising properties such as very good mechanical and electrochemical properties compared with PMMA.
The good mechanical properties of PEMA make it suitable for lithium battery application.
The VTF relation describes the transport properties in a viscous matrix.
[11] J.E.Weston, B.C.H.Steele, Effects of inert fillers on the mechanical and electrochemical properties of lithium salt-poly(ethylene oxide) polymer electrolytes, Solid State Ionics 7 (1982) 75-79
Online since: March 2012
Authors: Fei Shen, Hua En Zhao
Functional properties of nanophase materials are different from conventional materials, which determined the related technology for the rapid development and wide application space.
The characteristics of nanophase materials are different from conventional materials in function, which is the key factor for its rapid development of correlative technology and its widely application.
All the data tell us that the CaCo3 monofilament fibers are better than domestic product in the tensile strength, elongation and shrinkage properties.
Nanophase material with high specific surface area of the nanometer particles can be easily adsorbed by the textile surface, and coating with nanometer material does not affect the fabric air permeability and handle feel.
The textile can store energy, while retaining the mechanical properties.
The characteristics of nanophase materials are different from conventional materials in function, which is the key factor for its rapid development of correlative technology and its widely application.
All the data tell us that the CaCo3 monofilament fibers are better than domestic product in the tensile strength, elongation and shrinkage properties.
Nanophase material with high specific surface area of the nanometer particles can be easily adsorbed by the textile surface, and coating with nanometer material does not affect the fabric air permeability and handle feel.
The textile can store energy, while retaining the mechanical properties.
Online since: June 2012
Authors: Jin Long Zhang, Nan Nan Zhu, Hai Zhen Liang, Zhe Bo Zhou, Qing Hong Zhou
the Casting Process of The High Chromium Cast Iron Grinding Ball in Mill
Zhebo Zhou1, a, Qinghong Zhou2, b, Haizhen Liang3, c, Jinlong Zhang4, d and Nannan Zhu5, e
1Department of Mechanical Engineering, Anhui University of Science and Technology, Huainan, China
2Department of Mechanical Engineering, Anhui University of Science and Technology, Huainan, China
3Department of Mechanical Engineering, Anhui University of Science and Technology, Huainan, China
4Department of Mechanical Engineering, Anhui University of Science and Technology, Huainan, China
5Department of Mechanical Engineering, Anhui University of Science and Technology, Huainan, China
azhouzhebo@21cn.com, bzhou_qinghong@sina.cn, clianghaizhen2010@163.com,dzhangjinlong063@126.com,e zhunannan021@126.com
Keywords: Grinding ball, High chromium cast iron, Metal mold, Casting processes
Abstract.
The casting of the grinding ball 2.1 The choice of chemical composition 1) Carbon Carbon content is the important factor which decides hardness and toughness of high chromium cast-iron of grinding ball.
It results in grinding ball’s seam being too big, so it affects its surface quality and causes grinding ball being capsule form which influence grinding ball’s roundness.
Through the chemical composition analysis, the test of metallographic organization and mechanical properties, and service performance test, every indicator of grinding ball accords with the requirements of the standard.
[3] Zhongcheng Zhang, Study on Impact Wear Properties of High Chromium Cast Iron [J], FOUNDRY TECHNOLOGY
The casting of the grinding ball 2.1 The choice of chemical composition 1) Carbon Carbon content is the important factor which decides hardness and toughness of high chromium cast-iron of grinding ball.
It results in grinding ball’s seam being too big, so it affects its surface quality and causes grinding ball being capsule form which influence grinding ball’s roundness.
Through the chemical composition analysis, the test of metallographic organization and mechanical properties, and service performance test, every indicator of grinding ball accords with the requirements of the standard.
[3] Zhongcheng Zhang, Study on Impact Wear Properties of High Chromium Cast Iron [J], FOUNDRY TECHNOLOGY
Online since: June 2017
Authors: Jia Rong Li, J.C. Xiong, Yan Peng Xue, Jin Qian Zhao
The occurrence of the secondary γ′ precipitation resulted from the complex interaction of multiple thermodynamic and kinetic factors in the γ′ nucleation and the diffusion rate of γ′ forming elements.
Due to its excellent high temperature mechanical property, superior resistance against hot corrosion and oxidation at elevated temperature, it is widely used for components in the hot sections of gas turbines for aero-engines.
The excellent high temperature mechanical property is mainly acquired by a large amount of coherent γ′ precipitates from the γ matrix in Ni-based single crystal superalloy [2–4].
In order to explain the above results of the primary γ′ size changes, the thermodynamic and kinetic factors need to be considered for the formation of the primary γ′ precipitates.
Based on these discussions, the secondary γ′ precipitates result from the complex interaction of multiple thermodynamic and kinetic factors such as driving force for the γ′ nucleation (critical nucleation barrier, ΔG*), the γ′ nucleation sites (related to the nucleation rate) and the diffusion rate of γ′ forming elements.
Due to its excellent high temperature mechanical property, superior resistance against hot corrosion and oxidation at elevated temperature, it is widely used for components in the hot sections of gas turbines for aero-engines.
The excellent high temperature mechanical property is mainly acquired by a large amount of coherent γ′ precipitates from the γ matrix in Ni-based single crystal superalloy [2–4].
In order to explain the above results of the primary γ′ size changes, the thermodynamic and kinetic factors need to be considered for the formation of the primary γ′ precipitates.
Based on these discussions, the secondary γ′ precipitates result from the complex interaction of multiple thermodynamic and kinetic factors such as driving force for the γ′ nucleation (critical nucleation barrier, ΔG*), the γ′ nucleation sites (related to the nucleation rate) and the diffusion rate of γ′ forming elements.
Online since: January 2012
Authors: E. Evangelista, H.J. McQueen
A significant objective in secondary Al manufacturing is to achieve enhanced sustainability through combined mechanical and thermal processing for improved properties giving reduced mass and longer life along with decreased processing steps, energy consumption and pollution.
TMP always involves a mechanical shaping operation that must successfully create the shape and impart a structure leading to the specified mechanical properties.
DMB develop directional properties (texture) that depend on the method of mechanical shaping, being little affected by T in deformation.
Almost every process combination has instances of marked improvement of selected properties; however, it is not necessarily applicable to other alloys.
Sellars, Al Alloys, Physical Mechanical Properties, ICAA3, L.
TMP always involves a mechanical shaping operation that must successfully create the shape and impart a structure leading to the specified mechanical properties.
DMB develop directional properties (texture) that depend on the method of mechanical shaping, being little affected by T in deformation.
Almost every process combination has instances of marked improvement of selected properties; however, it is not necessarily applicable to other alloys.
Sellars, Al Alloys, Physical Mechanical Properties, ICAA3, L.
Online since: July 2011
Authors: Jim Chen, Peter Herd
Proper TCPT should be selected based on several factors: exposed temperatures and heating rates, number of temperature cycles, mechanical movements, chemical and / or alloy contents, applications and ease of use.
Other physical properties.
Within this group of TCPTs, there are specification and production variations in Cast Iron chemistry and therefore resultant physical properties.
This tube has excellent non-wetting properties, allowing easy slag removal.
The properties of the Pinnacle make it a superior alternative to other tubes in temperature measurement.
Other physical properties.
Within this group of TCPTs, there are specification and production variations in Cast Iron chemistry and therefore resultant physical properties.
This tube has excellent non-wetting properties, allowing easy slag removal.
The properties of the Pinnacle make it a superior alternative to other tubes in temperature measurement.