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Online since: January 2005
Authors: Lian Zhou, Yong Qing Zhao
Burn resistant Ti alloys possess good burn resistance and mechanical properties.
It has good burn resistance and not bad mechanical properties (Table 6).
These two alloys have good mechanical properties (Table 7).
The burning behavior and its affecting factors of titanium alloys were deeply and systematically researched by DCSB (direct current simulation burning) method that was invented by the present authors in NIN.
Factors influencing alloy's creep mechanism are complicated.
Online since: October 2023
Authors: Csaba Felho, Ziya Mehdiyev
The main purpose of this investigation is based on the key factors that affect the adoption of metal AM in the automotive industry and to identify potential areas for future research.
Thus, the used materials must be carefully selected to ensure about providing optimal mechanical properties and performance.
The surface finish of the parts produced by metal AM is affected by various factors such as the manufacturing process, material properties, and post-processing methods.
Seifi, “Metal Additive Manufacturing: A Review of Mechanical Properties,” Annu Rev Mater Res, vol. 46, no. 1, pp. 151–186, Jul. 2016
Anisotropy and heterogeneity of microstructure and mechanical properties in metal additive manufacturing: A critical review.
Online since: May 2015
Authors: Miroslav Tomáš, Emil Spišák, Ján Slota, Juraj Hudák
During tests, problem have been solved concerning the hemispherical punch lubrication which affected fracture position on the dome.
The complexity of the processes of plastic forming imposes a rigid and frequent characterization of the mechanical behavior and formability of sheet metal used in these processes.
The locus of the forming limit is called the forming limit curve (FLC), and the FLC is affected by many factors, such as the forming speed, the lubrication condition, the thickness of sheets, the strain hardening, and the anisotropy of the sheet metals [2].
The tensile properties in 0°, 45°and 90° directions to the rolling direction shown in Table 1 have been measured: - yield strength, ultimate tensile strength and elongation by STN EN ISO 6892-1, - normal anisotropy ratio by ISO 10112 , - strain-hardening exponent by ISO 10275.
Tab. 1 The tensile properties of TS 245 tin steel sheet, thickness 0.28 mm Direction [°] Rp0,2 [MPa] Rm [MPa] A80 [%] r [-] rm [-] ∆r [-] n [-] nm [-] ∆n [-] 0 250 370 31.1 1.171 1.330 -0.206 0.188 0.195 -0.008 45 245 358 37.8 1.433 0.199 90 254 367 36.8 1.284 0.194 The limit strains have been measured by Nakajima test - Fig. 1.
Online since: December 2014
Authors: Gurinder Singh Brar, Gaurav Mittal
It has been seen that electrode type is significant factor for all output parameters.
EDM electrode material must have basic properties such as electrical and thermal conductivity, a high melting temperature, low wear rate, and resistance to deformation during machining.
Electrodes used in EDM are generally fabricated by traditional mechanical machining process.
When attempting to obtain good surfaces of die with specific properties, using a special alloy as die material, such mechanical machining is difficult.
An L18 orthogonal array of Taguchi methodology was used to identify the effect of process input factors (current, duty cycle and flushing pressure) on the output factors {material removal rate (MRR) and surface roughness (SR)}.
Online since: January 2015
Authors: Qiang Li, Feng Du, Jing Li, Hai Jiang
Multiple factors affect the adhesive performance of the caterpillar surface.
The choice of biological prototype Hydrophobic surfaces have considerable technological potential for various applications due to their water-repellent properties.
By learning from and mimicking what was found in nature, more bionic surfaces with similar properties can be created and find their applications where hydrophobic surfaces are required.
Bionic design It was well known that the superhydrophobic non-stick properties of lotus leaf surfaces are closely related to the convex hull structure [10].
By learning from and mimicking what was found in nature, more bionic surfaces with similar properties can be created and find their applications where anti-adhesion is required.
Online since: September 2015
Authors: Anna Krawczuk, Jacek Domińczuk
The energy depends on many factors, for example: on geometric structure of the surface, physical properties of materials, method of preparation and modification of surface layer [3,4,6].
In such cases, we can not used other methods, which results are obtained by averaging the properties of the material throughout its mass, because the modified surface layer has different properties than other materials.
Other factors not related to the interactions at the interface (strength of the adhesive itself, of combined materials) also affect the strength of joints.
Results presented in Fig. 5 indicate that the method of surface preparation, including ozonation, is a factor substantially affecting the energy state of the surface layer and particularly affects its components.
Rudawska, Adhesive Properties, Scanning Electron Microscopy, InTech, 2012, http://www.intechopen.com/books/scanning-electron-microscopy/adhesive-properties.
Online since: April 2016
Authors: Lukáš Kalina, Jiří Kratochvíl, Ladislav Pařízek, Vlastimil Bílek Jr., Petr Kosár
Properties of AABFS based specimens were compared to those of specimens based on ordinary Portland cement (OPC).
Their properties can be controlled by the Si to Al ratio, but they usually predominate in low thermal expansion properties, heat resistance and fire resistance [4].
Detailed characteristics of C-(A)-S-H phase depend on the type of activator used and other factors.
Abdel-Rahman, Influence of cement kiln dust substitution on the mechanical properties of concrete, Cem.
Shah, Hydration and properties of novel blended cements based on cement kiln dust and blast furnace slag, Cem.
Online since: September 2013
Authors: Jin Yong Xu, Cheng Gao, Wen Yao Luo, Yi Guang Wang, Bo Gao
Antibacterial stainless steel with corrosion resistance, Wear resistance, aesthetics of stainless steel itself, As well, have good antimicrobial properties, are widely used in daily life.
The author uses the double glow plasma surface metallurgy technology to study how to permeate Copper -cerium element into stainless steel [1], so as to obtain Surface alloy layer with excellent antibacterial properties.
Double glow plasma surface metallurgy technology is original in China with independent intellectual property rights of high technology [2], the process of Antibacterial preparation is complex.
Copper-cerium case depth, elements component in the layer affected by many factors, Mainly includes the distance between the work-piece and the source[3], Working pressure, holding temperature and time, work-piece and source voltage and so on.
Combined with the hollow cathode effect, Point discharge effect, Argon ion bombard Work-piece and the source, plasma sputters the copper-cerium particles, Under the action of electric field change into high-energy particles, Bombard, enter and spread to the work-piece surface, forms alloy layer with special physical and chemical mechanical and mechanical properties in the work-piece surface. 1.2 Experimental material The selection of workpiece and the source material: Work-piece adopts 304 stainless steel (No.6cr19ni10 steel), work-piece size is 70mm×25mm×2mm.
Online since: June 2007
Authors: Sang Hoon Lee, Ju Yeoul Baek, Gu Han Kwon, Jeong Yun Kim, Jin Ho Cho, Seung Ha Lee, Kyung Sun
The surface treatment via the oxygen plasma ions significantly affects the adhesion of metal layers to the PDMS surface, while the other factors exhibited no significant relations.
But, they are not suitable for long-term implantation owing to the mechanical rigidity and fragility of silicon, so the flexible materials, such as polyimide, SU-8, parylene and PDMS have been employed as an alternative substrate of silicon [1-3].
The plasma treatment of polymer surfaces to uniformly modify these surfaces without affecting the bulk properties has been widely employed [6].
The plasma treatment of the PDMS surface significantly affects the adhesion-strength of metal layers.
Online since: September 2016
Authors: Peter E.J. Flewitt, Ana Isabel Martinez-Ubeda, Alexander D. Warren, Ian Griffiths
The heat affected zone of weldments, in these thick section headers and thin walled boiler tubes, have been found to be susceptible to creep damage leading to cracking during service.
Introduction Austenitic stainless steels are used in electrical power generating plant for a range of components because they have good corrosion resistance and high temperature mechanical properties.
Various interactive factors contribute to both creep deformation and creep fracture and these have to be taken into account when evaluating service life.
However, one important factor is the initial microstructure of the fabricated component that enters service.
Creep deformation and fracture are controlled by a series of interacting factors, which need to be considered to evaluate service life [1].
Showing 8731 to 8740 of 25935 items