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Online since: December 2011
Authors: Xu Dong Zhou, Xiang Ru Liu
The researches of non-oriented silicon steel are mainly focused on the effect of main processing parameters on the microstructure and magnetic properties, but there have been few studied about its flow stress until now.
In this paper, the non-oriented silicon steel 50A1300 of hot forming is studied by thermal-mechanical simulation method.
Introduction The researches of non-oriented silicon steel are mainly focused on the effect of main processing parameters on the microstructure and magnetic properties[1-6].
In this paper, using thermal-mechanical simulation method the hot deformation behavior of the steel 50A1300 is discussed in order to explore the effect of deformation temperature, strain rate, strain extent on the deformation resistance.
(2) Statistical analysis of experimental results shown that the strain rate and deformation temperature are not only the most sensitive factors, but also processing control factors
Online since: January 2014
Authors: Ben Chen, Tao Zhu, Xin Yun Li, Yu Jiao Wu
In this paper, the author mainly analyzed the representative 6063 aluminum alloy of Al-Mg-Si series alloys, researched effects of solution treatment on 6063 aluminum alloy microstructure and properties, making sure that the perfect solution process can be attained to improve properties of 6063 aluminum alloy fully.
Fig.2 Mechanical properties of 6063 samples solution treatment at different temperature and time Fig.3 shows the measurement of 6063 samples electrical resistivity with different solution temperature and time.
From the above, there is a certain relationship existed between mechanical properties and electrical resistivity of 6063 aluminum alloy after heat treatment, which can indicate that the macro-properties of alloy is determined by the micro-structure in itself, and different kinds of properties can be reflected each other at a large extent.
Disciplines of multiple factors affecting solution treating of aluminum alloy, The Chinese Journal of Nonferrous Metals. 9 (1999) 79-86
Mechanical properties and electrical conductivity of aluminum alloys, Light Metal Alloy. 6 (2005) 34-36.
Online since: November 2011
Authors: Jin Xia Zhang, Yi Miao Nie, Fu Sheng Niu, Shu Xian Liu
The influences factors of the type and dosage of dispersant, the type and dosage of flocculant, pulp density etc etc on its effect is analyzed, and, through the orthogonal experimental methods, the salience order, interaction, and the optimum combination of the main factors is revealed.
PRoperties Of Coal Sample Analysis of coal sample Not all of the coal can be used to super clean coal preparation.
The effect result of pH The test of pulp pH.PH value of slurry is the main factor affecting floatation one, it is also the electrical particles in the slurry and the charge of one of the major determinants of mineral floatability is also visible.
PH value with further increase in alkaline solution, more and more strong, then the adsorption of OH ions and ionization of surface groups reduced the hydrophobicity of coal surface, thereby affecting the selective flocculation, separation efficiency varies with the lower.
The influences factors of the type and dosage of dispersant, the type and dosage of flocculant, pulp density etc on its effect is analyzed, and, through the orthogonal experimental methods, the salience order, interaction, and the optimum combination of the main factors is revealed.
Online since: May 2006
Authors: Raluca Savu, Ednan Joanni, José R. A. Fernandes
The measurement of the ferroelectric hysteresis curves confirmed that the structural changes induced by different processing parameters affected the ferroelectric properties of the material.
In order to use these ceramics to their full potential, thorough research of their properties is needed [1].
In order to optimize the film properties and performance it is essential to understand the factors that influence these properties and, in recent, an extensive experimental work was carried out on the characterization of these ferroelectric thin films [3].
The main objective of this work is to study the properties of Si/SiO2/Ti/Pt/PZT/Al stacks in order to optimize its piezoelectric properties so it can be used as micro-actuator for integrated optic devices.
The processing conditions were changed in order to maximize the ferroelectric and piezoelectric properties.
Online since: February 2020
Authors: Wen Yi Wang, Somchai Udon, Chi Wai Kan, Rattanaphol Mongkholrattanasit, Sakorn Chonsakorn, Suchitra Chanuntawaree, Manat Peangsai, Hin Heng Lois Yim
Hand feel properties are importance factor of quick dry inner wears.
Based on the system calculation by PharbrOmeter, the properties related to hand value of resilience, softness and smoothness could be obtained.
It was reported that the fiber diameter and thickness are the main factors affecting resilience of fabric.
As discussed above, the fabric with less density, weight and thickness is conducive to the resilience properties.
Softness is highly correlated with fabric compression properties [7].
Online since: October 2006
Authors: Heng Hua Zhang, Xian Nian Zhang, Guang Jie Shao, Luo Ping Xu, Yi Tao Yang, Bao Liang Sun
Influence of Morphology on the Rheological Behavior of Semi-Solid A356 Aluminum Alloy Zhang Henghua1,a, Zhang Xiannian1,b , Shao Guangjie1,c , Xu Luoping 1, Yang Yitao1 and Sun Baoliang2 1 School of Material Science and Engineering, Shanghai University, Shanghai 200072 China 2 Shanghai HuiZhong Automobile Manufacture Ltd Company, Shanghai 200122 China a hhzhang@mail.shu.edu.cn, bxiannzhang@163.com, cgjshao@staff.shu.edu.cn Keywords: Aluminum alloy, Semi-solid slurry, Morphology, Apparent viscosity Abstract: The morphology of semi-solid alloy is one of the key influence factors on the rheological behavior of slurry during die filling and the mechanical properties of formed parts.
Introduction The semi-solid forming (SSF) technique has been widely applied in many industries, especially in the automobile industry, after more than 30 years research and development since the technique had been invented at 1970s as it has the advantages of more compact microstructure, less entrapment of gas and better mechanical properties [1~4].
The microstructure and morphology of semi-solid alloy will greatly affect the rheological behavior of slurry during die filling and the mechanical properties of formed parts [5~7].
Only a few papers have studied on the controlling microstructure and morphology by mechanical stirring [8].
Cyprus Sept. 20-23 (2004) [8] Tang Jinglin, Zheng Daben: Influence of Microstructure of Semi-solid A356 Alloy on its Transient Rheological Behavior, Special Casting & Nonferrous Alloys, Vol. 20 (2000), p.43 [9] Zhang Xiannian, Zhang Henghua, Shao Guangjie, Xu Luoping: Development of Viscometer for Semi-solid Metals, Special Casting & Nonferrous Alloys, Vol. 25 (2005), p.425 [10] Zhang Henghua, Tang Xuan, Shao Guangjie: Microstructure and Mechanical Properties of Purity Aluminum Refined with Salt Containing Ti and B Elements.
Online since: November 2012
Authors: Zhi Long Xu, Ju Dong Liu, Song Wei Huang, Jin Kui Xiong, Wei Yuan
The depth of cut ap and grinding method gm are significant factors that affected the size of two-side direction burr, and the significant order are as follows: depth of cut ap> grinding method gm > table speed vw >interaction av.
It realizes the integrated manufacturing of grinding and surface hardening and has wide application prospects in the filed of grinding machine and improving surface properties of metal material [1-2].Since the grinding-hardening process was put forword, lots of scholars studied on grinding-hardening machine and achieved some research results [2-12], but rarely studied on the two-side direction burr formed in grinding-hardening machine.
But depth of cut is highly significant factor, table speed and grinding method are general significant factors.
But depth of cut is highly significant factor, table speed and grinding method are general significant factors.
Conclusions (1) In grinding-hardening machine, the depth of cut ap and grinding method gm are significant factors that affected the burr’s size, the table speed vw and interaction av are insignificant factors.
Online since: March 2009
Authors: Jian Lu, Xiao Fang Yang
Introduction Nanocrystalline materials have attracted extensive attention due to their excellent properties over their coarse grained polycrystalline counterparts [1-3].
The global behaviour may be effectively enhanced by optimizing the structure and properties of the surface of the material.
With this kind of surface modification, the surface properties can be greatly enhanced without changing the chemical composition [17-20].
To achieve a much thicker nanostructured layer, the external factors are taken into account such as mechanical and thermal stress.
The mechanical properties of the sample treated under traction will be investigated systematically in the future.
Online since: June 2007
Authors: Jae Hyun Shim, Nam Hee Cho
The Effect of DC Bias Voltage on the Structural and Optical Properties of Hydrogenated Nanocrystalline Si Thin Films Jae-Hyun Shim 1, Nam-Hee Cho1,a 1 Department of Materials Science and Engineering, Inha University, Inchon 402-751, South Korea a Corresponding author: nhcho@inha.ac.kr Keywords: nc-Si, DC Bias, PECVD, PL Abstract.
The mechanical properties of the films with sub-micrometer thickness was characterized by nano indenter (MTS, Nano indenter XP).
It is likely that there are factors affecting the stretching vibration of Si-Si bondings, and thus giving rise to the observed shift in ωTO of the Raman spectra.
The force constant of the bondings as well as the position of the Raman peaks are supposed to be critically affected by the mechanical strain in the films.
In particular, it seems that the evolution of the mechanical strain and the shift in ωTO is partly due to the formation of Si nanocrystallites in the films.
Online since: November 2010
Authors: Yi Li Zhu, Long Xiang Xu
The simulation results show that shaft rotating speed, ball materials, axial preload and the initial contact angles to some extent impact the bearing stiffness while have little affects on system nature frequency and the rotor unbalance response which greatly affected by the system base stiffness.
After comparing experimentally the stiffness and damping properties of DDHPB with those of conventional rolling-element bearing [2], Prashad reports them better than those of the conventional bearings.
Establishment of Geometric and Mechanical Model of DDBB Mechanical Model.
The structure and detailed ball mechanical model of DDBB are depicted in Fig.1 and Fig. 2 respectively. 2gjM 2ojQ 2cjF ' 2ojα ' 2ijα 2 2 2 ij gj bM Dλ 2ijQ 1 1 1 oj gj bM Dλ 1gjM 1ojQ 1cjF ' 1ojα ' 1ijα 1 1 1 ij gj bM Dλ 1ijQ Fr aF 2 2 2 oj gj bM Dλ Fig. 1 Structure of DDBB Fig. 2 Ball mechanical model Structure of DDBB Fcjε, Mgjε, Qijε and Qojε respectively denote the jth ball centrifugal force, gyro moment of the εth series, ball-race contact forces at corresponding inner and outer race. λij1, λoj1, λij2 and λoj2 are introduced correction factors.
All of those correction factors equal 1 when DDBB rotates at low speed.
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