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Online since: August 2009
Authors: Song Zhang, Y.B. Guo
Guo2, b 1 School of Mechanical Engineering, Shandong University, P.
In actual practice, there are many factors which affect the surface roughness, i. e., tool variables, workpiece variables, cutting conditions, and so on.
The factors and levels were assigned in Table 1 according to the finish conditions for high-speed milling hardened H13 steel.
The work material was thoroughly hardened and tempered to 50 ± 1HRC, whose normal chemical composition and mechanical properties are given in Tables 3 and 4, respectively.
In this present work, the purpose of ANOVA is to investigate the significant factors affecting the performance measures and to facilitate the optimization of the machining process.
Online since: July 2015
Authors: Domenico Umbrello, Serafino Caruso, Sebastiano Candamano, Fortunato Crea, Claudia Varrese, Davide Campanella, Luigino Filice
In this study, the mechanical properties of welded joints of AA 6005 aluminum alloy obtained with friction stir welding (FSW) and conventional metal inert gas welding (MIG) are studied.
Introduction The natural qualities of aluminium and its alloys are positive factors for designers, manufacturers and industrial users due to their unique mechanical, electrical, thermal, and recycling properties as lightness, corrosion resistance, etc.
In this context, and taking into account the series of disadvantages when traditional welding processes are applied to aluminum alloys, this work aims to compare the mechanical properties of FSW with conventional arc-welding method metal inert gas welding (MIG).
In contrast, the joint ductility (i.e. elongation at break) obtained by FSW shower lower properties when compared to the MIG welds.
A different structure was observed for FSW, in fact it is showed that the Thermo-Mechanical Affected Zone is characterized by recovered grains containing an high dislocation density, while in the stir zone, a very fine equiaxed grains occur due to the dynamic recrystallization [3, 4].
Online since: April 2020
Authors: İlkay Turhan Kara, Sevil Yücel, Muhammet Arıcı
• Optimized aging factors were 0.50 molar ratio of Mg:Si, 80 ºC and 60 h
Several types of research have been focused on improving structure properties (improving surface properties and the porous structure) of magnesium silicate by chemical synthesis on nanoscale [1, 4- 7].
Effect of process factors on the responses of MSA production.
All the responses either individually or interactively affected aging factors and MSA were produced with the properties having a wide range varying values such as: from 168 to 786 m2.g-1 BET surface are, from 0.15 to 0.48 cm3.g-1 BJH pore volume, from 4.28 to 7.12 nm BJH pore size, from 0.11 to 0.14 g.cm−3 density and from 95 to 97 % porosity.
The BET surface area and the BJH pore volume increased and BJH pore size decreased with increasing aging factors until the critical aging points of all the factors.
Online since: July 2018
Authors: Ying Shi Sun, Duo Sun
As the heat source moves, the temperature of the entire weldment changes rapidly with time and space, and the physical properties of the materials also vary drastically with temperature.
A number of factors affect the temperature field, such as the heat source of welding, welding speed, size of welding materials, boundary conditions, thermophysical properties of materials and other parameters.
Consequently, the calculation of the temperature field should take into account the above factors [6].
The Gauss heat source model has been applied to simulate argon arc welding in this paper, and the thermophysical properties of materials are given in Table 1.
Connotation and Development of Mechanical Reliability-based Design.
Online since: May 2006
Authors: Ana M. Segadães, Tessaleno C. Devezas, Abílio P. Silva
Two regions of high flowability (FI > 150%) can clearly be seen, evidencing the effect of two major factors promoting high flowability.
Sintered Body Properties.
Table 1 presents the results obtained for the properties of the fired bricks produced with the various castables.
Again, all these properties were modelled using Statistica and response surfaces were obtained.
Barna, Handbook of Industrial Refractories Tecnhology, Principles, Types, Properties and Applications (Noyes Pub., NY 1992)
Online since: December 2024
Authors: Agus Dwi Anggono, Abdul Munir Hidayat Syah Lubis, Agung Setyo Darmawan, Ngafwan Ngafwan, Aldo Cahya Putra, Krisnandita Akbar Ramadani
Li et.al [9] conducted a study on the effects of quenching medium on the microstructure and mechanical properties of high chromium cast iron.
The quenching process significantly affects the mechanical properties and microstructure of iron.
The cooling rate during quenching has a significant impact on steel's microstructure, which in turn affects its mechanical properties.
Tyrała, Effect of Cooling Rate on Microstructure and Mechanical Properties of Thin-Walled Ductile Iron Castings, J Mater Eng Perform 22 (2013) 300–305
Madalli, Experimental Evaluation of Mechanical and Metallurgical Properties of Gray Cast Iron, in: R.K.
Online since: September 2016
Authors: Xu Chen, Rui Si Xing, Xiao Peng Liu
While the fatigue life was badly affected by the loading paths.
While, aluminum alloys are widely used in the industry for the reason of their superior mechanical properties such as low density, high strength-to-weight ratio, good corrosion resistance excellent weldability and deformability [2] In recent years, most research on aluminum alloys have focused on their fatigue property under different loading conditions.
Microstructural and Mechanical Properties of Walking Friction Stir Spot Welded AA 6061-T6 Sheets[J].
A rationalization of factors affecting strength, ductility and toughness of AA6061-type Al–Mg–Si–(Cu) alloys[J].
Strain-Controlled Low-Cycle Fatigue Properties of Extruded 6061-T6 Aluminum Alloy[J].
Online since: December 2006
Authors: Lan He, Yun Wen Shen, Kai Leung Yung, Yan Xu
Simulation results show the surface roughness has great impact on the rheological properties and phase orientation of LCP melts in the nanochannel (cross section is 12nm).
Introduction LCPs are a new class of macromolecular materials that, suitably processed, behave in a self-reinforcing manner and exhibit special properties in comparison with tranditional polymers.
In the last decades, a number of investigators [1,2]examined how the injection pressure and rate affected the mechanical properties of injection molded specimens made from LCPs at macro scale.
In addition, temperatures of injection mould and roughnesses of mould wall are also very important, influencing the LCP micro/nano melt flow and the mechanical properties of specimens.
Conclusions In this paper, the effects of wall roughness on the rheological and structural properties of the nano- melt LCP film have been studied by using MD simulations.
Online since: August 2018
Authors: Annalisa Lanza Volpe
Introduction The idea of a building regulating the factors that affect human comfort has ancient origins.
Material properties may be a constant or may be a function of one or more independent variables, such as temperature.
One could think of façade that for example change their acoustic properties, when objects are passing that produce unwanted noise [26].
However the development of adaptive façades is complex and influenced by many factors.
It also discusses emerging technologies and advanced, describing their properties and applications.
Online since: January 2017
Authors: Ru Feng Jia, Wei Dong Zhang, Li Jin Xu, Jian Qu, Xiao Xue, Zhuo Yang, Zhong Yu He, Jie Qin, Yanwen LI
The study of an energy efficient cool white roof coating based on styrene acrylate copolymer and cement – Part II: mechanical and water impermeability properties.
The investigations of factors affecting the water impermeability of inorganic sodium silicate-based concrete sealers.
Mechanical properties and durability characteristics of polymer- and cement-based repair materials.
Properties of polymer-modified cement mortar using pre-enveloping method.
Influence of EVA and acrylate polymers on some mechanical properties of cementitious repair mortars.
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