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Online since: November 2011
Authors: Jose María Cabrera, Gonzalo Varela-Castro, J.M. Prado
DRX is able to cause a great impact on the hot flow behavior affecting the microstructure and properties of the material after processing.
Then, the desired mechanical properties can be achieved by acting on the DRX kinetics [1].
There is a number of factors which can affect the DRX namely: the chemical composition of the alloy, the grain size at the beginning of the deformation, the deformation mode (Fig. 2) and the applied thermomechanical cycle [3,7-9].
Valuable information for modeling features of these processes like the kinetics of transformations, mechanical properties, microstructure evolution and so on, can be obtained.
The data show the different approaches provided and applied in each particular case and that there is a wide range of variables that affecting the determination of the kinetics of DRX.
Online since: August 2015
Authors: Jan Vanerek, Anna Benešová
The structure can be change by combination of various factors, such as thermal, chemical, mechanical or biological action. [2] The usage of recycled plastics as WPC matrix requires proper manufacturing method considering actual recycled polymer characteristics.
Strength properties were determined for reference (not weathered) samples, samples weathered for 3 and 9 cycles.
Obtained results of strength properties of tested samples are given in following Table 4 and shown on Figures 2 and 3.
Highest values of strength properties were achieved by the samples with wholly regranulate matrix.
Effects of polymeric matrix on accelerated UV weathering properties of woodplastic composites.
Online since: July 2013
Authors: Alexander Burya, Georgiy Kozlov, Maryana Gubskaya, Xiang Ming Feng, Xiang Yang Qian
As it should be expected, based on the most general principles, the reinforcement degree of the investigated nanocomposites is determined by three groups of factors: properties of the polymer matrix and nano-filler, and their level of interaction.
As it should have been expected, based on the most general principles, the reinforcement degree of the investigated nanocomposites is determined by three groups of factors: properties of the polymer matrix and nano-filler, as well as their level of interaction.
Anharmonic effects and physico-mechanical properties of polymers.
Effect of organoclay structure on morphology and properties.
Fractal analysis of structure and properties of interface layers in discontinuously filled polymer composites.
Online since: June 2017
Authors: Ya Li Wang, Hong Liu, Su Ping Cui, Qi Gang Zhao, Zuo-Ren Nie
In this article, water morphology, thermal decomposition properties, anhydration process parameters, and water content after anhydration of sludge samples (initial solid content 20%, thermal value of dried matrix 3400 cal/g) were investigated to understand effects of water content and thermal value of sludge on its treatment by cement kiln, and effects of thermal decomposition properties of sludge on anhydration equipment and process.
Physical Properties of Sludge Chemical composition of sludge.
Fig. 1 Mineral composition of municipal sludge Thermal Decomposition Properties of Sludge The thermal decomposition properties of sludge were characterized using thermogravimetry (TG) and differential scanning calorimetry (DSC).
On the other hand, anhydrated sludge with water contents below 35% (yet above 25%) is favorable for transportation due to its favorable physical properties and no significant dust was produced.
Indeed, the difference between the designed anhydration temperature and the actual heating temperature and residence time of water are key factors for efficiency of sludge anhydration.
Online since: July 2023
Authors: P. Umamaheswarrao, Shaik Musharaf, D. Vijay Praveen, Avula Suresh, S. Praveen, Shaik P. Abdulla, T. Sahit Kumar
Materials which possess superior properties, brittle are difficult to machine using conventional methods.
So that these factors are taken as input process parameters.
Four factors were chosen for the present study among which one factor with two levels and all the other factors with 3 levels.
Yi is the normalized asset value of its alternatives, where g represents maximization; (n-g) represents minimization with considering all properties
A2 (Laser power at 2 kW), B3 (Gas pressure at 1 bar), C3 (Focal length at 1.2 mm) D1 (cutting speed at 1300 mm/min) Conclusions The experiments were conducted as per Taguchi’s L18 orthogonal array and multi-objective optimization was performed using MOORA · Laser power was observed to be the most significant factor affecting the kerf width followed by focal length, gas pressure and cutting speed
Online since: July 2014
Authors: Li Jun Yang, Chao Jian Hou, Wei Qiang Chen, Liang Li, Yang Wang
Jose[9] also used 1064nm pulsed Nd:YAG laser to do the cutting experiments of CFRP, the results show that the good cutting quality can be obtained by laser parameters optimization used response surface method and put forward material composition and fiber volume content are the main factors to control cutting performance.
a)Along/vertical fibre direction b)A certain angle with fiber direction Fig.11 The surface topography of kerf under different cutting direction Summary 1) By choosing suitable laser parameters can effectively reduce the heat affected zone of surface; 2) When cutting direction is consistent with fiber direction, the heat affected zone of surface can be reduced; 3) Laser cutting speed is the most significant factor which affect the quality of cross-section; 4) Suitable laser parameters and the cutting direction can get no delaminated kerf which has less burr, small heat affected zone and smoothing cross section.
Journal of Mechanical & Electrical Engineering,2013(30):182-184
Mechanical Design and Theory in Hebei University of Science and Technology,2012:1-5
Study on microwave absorbing ability and mechanical properties of carbonous composiyes[D].Dong hua university,2008:27-28.
Online since: February 2013
Authors: Ji Long Su, Yan Jiao Zhang, Xing Feng Lian
The domestic and foreign scholars have conducted a series of studies to the mechanical properties, Lu Jing et al[2] proposed a calculation of the incremental iterative algorithm to analyze the characteristics of micro-beams of the force, the method which has high accuracy and stability is one of the effective methods to analyze large micro-beam deflection.
Micro-mechanical devices from the mechanical structure can be mainly divided into cantilever and fixed beam structure[5].
Many foreign scholars established a variety of micro-mechanical beam model, using finite element method to research both the mechanical properties of beam and pull-in voltage and pull-in deflection[6].
The stress distribution is the main factor in affecting the fatigue damage of micro-devices.
The results show that the mechanical properties of the micro-beams possess significant scale effect.
Online since: March 2008
Authors: Dun Wen Zuo, Wen Zhuang Lu, Feng Xu, Dang Zeng, Hong Xiang Wang, Jian Liang Shen
Study on the Temperature Field of Cemented Carbide Substrate in Miniature EACVD System Hongxiang Wang1,2,a, Dunwen Zuo 1, Wenzhuang Lu1, Feng Xu 1 , Dang Zeng1 and Jianliang Shen1 1 College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing, China 2 Department of Mechanical and Electrical Engineering, Huaian College of Information Technology, Huaian, China a whxsyhgf@163.com Keywords: Miniature EACVD system, Cemented carbide tools, Diamond films, Substrate temperature field,FE Abstract.
The uniform distribution and the stability of the substrate temperature are the most important factors that deeply affect the quality and the growth rate of diamond films.
Introduction CVD(chemical vapour deposition) Diamond films, with its singular mechanical, thermal, optical and electric properties, has quite wide application prospect in many fields[1,2], miniature EACVD system boasts not only the advantages of simple equipment, convenient operation, large films-growing area, non-strict requirements for the growth parameters, and low equipments investment, economical cost, but also its characteristic of small deposition area, low power equipment, which makes it as the firstly chosen method to industrialize the CVD films.
The chemical and physical properties of different materials in the system do not change with the temperature and pressure
Hot filament temperature is a key factor in EACVD deposit of diamond film.
Online since: November 2025
Authors: Josef Kasl, Růžena Fikrlová
Optimal properties are achieved by tempering in the temperature range of 750 °C to 760 °C.
This is associated with a decrease in plastic properties – an increase in the tensile strength and a decrease in notch toughness.
The phenomenon of secondary hardening can occur at the beginning of long-term operation, even if the creep properties are satisfactory.
(in Czech) [4] Sztefek, R., Vodárek, V., Schwarz, D., Jarolímová, M.: Microstructural paremeters and mechanical properties of the thermally simulated HAZ samples of T 24 steel, METAL 2015, Brno, Czech Republic, Juny 3rd – 5th, pp. 907 – 909
[6] Mráz, L´. et al.: Bevels with the utility properties of steel T24, Zváranie, No. 5-6, 2012, p. 105-113.
Online since: June 2014
Authors: Li Ping Liu, Xiu Feng Cao
Many studies dealt with the influence of each factor and the combination of two or three factors.
Low temperature made the physical properties of the polymer coatings change and influenced the service life [18].
The natural ageing of coated steel by multiple ageing factors had been proposed.
One of the most important properties that organic coatings must have was weathering resistance.
Some techniques focused on macroscopic properties, including change in contact angle and loss of gloss, weight, and mechanical integrity.
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