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Online since: September 2018
Authors: Marina Polyakova, Eduard Golubchik
It is connected with increasing customer demands both to quality and properties of metal items especially for automobile and pipe manufacturing spheres.
Methodology The developed methodology is based on the possibility of operational quality indices management by their adaptation both to external and internal factors affecting on the technological system.
In this connection the influence of these factors completely or partially may be uncertain.
Hence, all these factors form the basics for construction the roll system for powder rolling.
Conclusions Powder rolling makes it possible to get long length product in a wide range of properties.
Online since: December 2010
Authors: Yan Juan Li
Products of the material is ABS, the material has a high impact strength and mechanical strength, dimensional stability, resistance to chemical and electrical properties of good performance, ease of molding and machining, and other characteristics; have a certain moisture absorption, forming in the workpiece surface scarring, bubble, in injection moulding dry processing should be carried out before.
Melt in cavity flow and a number of factors, such as polymer properties and structure, injection plastic parts of temperature, pressure and time, as well as moulds and equipment, therefore faced with complex structures, the quality and accuracy of more sophisticated models, even experienced on-site technical staff, it is difficult to guarantee a one-off production of qualified products[5].
Injection mold gate location setting is directly related to melt in the mold cavity within the flow, thus affecting the polymer molecular orientation and product forming of warp.
Weldline and mechanical p roperties of injection molded polyethylene /polystyrene / copolymer blends.
Online since: February 2011
Authors: Yu Sheng Shi, Guang Ke Lin, Qing Song Wei, Xiao Zhao, Sheng Zhang
The part density is nearly about 100%, and mechanical properties are comparable with the forging process [1-3].
Many factors cause this.
The formability and densification of SLM is controlled by the powder characteristics and processing parameters .There are many researches focused on forming process, but the physical and chemical properties were rarely reported [7].
As Fig.3 shows oxygen content in powder formability is obviously affect the forming quality.
After several track are scanned, the formed surface becomes worse with a great number of large size isolated metal balls (Fig.3b), which seriously affects the quality of SLM forming.
Online since: April 2020
Authors: Vojtěch Václavík, Pavel Martauz, Branislav Cvopa
An analysis of the tests results showed that the mineralogy, morphology and strengths of aggregates are factors affecting the compressive strength and durability of HPC [11].
Table 3 Chemical properties of cements.
Testing the concrete properties.
Cheng, Factor sinfluencing the properties of a steels lagcomposite cement, Adv.
Tests for mechanical and physical properties of aggregates - Part 6: Determination of particle density and water absorption.
Online since: December 2012
Authors: En Ren Zhang, Ying Ying Cui, Lei Liu
Power output by MFCs could be affected by a number of factors, including mechanical engineering of the reactor configuration, chemical/biological processes and the operational conditions [5-8].
Among these factors, anodic pH has also been suggested to be crucial to MFC performance because microbial metabolic activity is generally controlled by the growing pH conditions.
Data shown in Fig. 2 indicate that altering anodic pH by two units allowed the anode potential to change ~ 0.376 V (see data between time T1 and T2 in Fig. 2), much larger than the theoretical value of 0.118 V, implying that anodic pH affects the electrochemical performance mainly through altering the catalytic activity of the anode-attached biofilm rather than through changing the thermodynamic properties of the microbial anode.
The experimental results presented herein suggest that controlling anodic medium close to neutral pH condition would allow the electroactive biofilm to function better, consistent with some experimental evidences which support that most anode-attached bacteria favour the alkaline pH conditions [9-11] Conclusions Anodic pH condition is shown to be an important chemical parameter for the electrochemical performance of the microbial anode, which in turn affects the overall MFC performance.
Online since: September 2016
Authors: S.K. Dinesh Kumar, R. Selvanayagam, M. Sivakumar, S. Krishnaraj
A Study on Working Process of Wire-EDM by Using Two Different Dielectric Fluids on HCHCr Alloy Steel S K Dinesh Kumar 1, a* R Selvanayagam 2,b M Sivakumar3, c S Krishnaraj4, d 1 Department of Mechanical Engineering, Sri Sairam Engineering College, Anna University, Chennai, 600044, India 2 Department of Mechanical Engineering, Bannari Amman Institute of Technology, Anna University, Sathyamangalam, 638401, India. 3Department of Mechanical Engineering, Bannari Amman Institute of Technology, Anna University, Sathyamangalam, 638401, India. 4Department of Mechanical Engineering, Sri Sairam Engineering College, Anna University, Chennai, 600044, India askdnsh@gmail.com, bselvanayagamr@bitsathy.ac.in, cmuthusivaa@gmail.com, dkrishnaraj.mech@sairam.edu.in Keywords: WEDM, Copper Powder, Metal Removal Rate (MRR), Surface Roughness (Ra), HCHCr.
Important properties of the AISI D3 Alloy steel are listed in Table 1 Table 1 Chemical Composition of D3 Alloy Steel (SPECTROMETRY TEST) Element C Si Mn P S Cr Mo Ni V W Fe % 2.265 0.326 0.358 0.019 0.024 12.25 0.021 0.025 0.009 0.021 84.66 Copper Powder Copper is a chemical element with the symbol Cu with atomic number 29.
Fig. 5 Сut the specimens after experimentation Effect of control factors on MRR (Copper powder) S/N Data From the Fig. 4 MRR and 5 MRR, the maximum material removal rate can be achieved from the following parameter in order of (pulse-on, pulse-off, current and voltage) is35μsec, 4μsec, 4A and 100Vfor AISI D3 steel 50mm work piece thickness, irrespective of the dielectric used.
Copper powder suspended in the dielectric medium would not adversely affect the surface roughness. 4.
Journal of Mechanical Engineering, 57 (5), 271–290.
Online since: October 2002
Authors: Filipe Neves, Teresa Marcelo, M. Helena Carvalho
Carvalho1 1 INETI, Department of Materials and Production Technologies, Azinhaga dos Lameiros, 1649-038 Lisbon - Portugal Keywords: Titanium Aluminides, �-TiAl alloys, Reactive Hot Isostatic Pressing (RHIP), Microstructures, Mechanical Properties.
Introduction The �-TiAl based alloys exhibit numerous attractive properties for high temperature structural applications in aerospace and automobile industries.
Extensive investigations have been undertaken on the processing methods for the �-TiAl alloys with additional alloying elements to control and optimize the mechanical properties and the corrosion behavior [1].
In the present work 1(at%)Ag additions and variation of parameters such as original Al powder size and RHIP holding time were introduced in RHIP processing of Ti-48(at%)Al alloys, in order to assess the effect on microstructure and properties.
[10] Material Properties Handbook - Titanium Alloys, ASM Intern., Materials Park (1994), p. 1011
Online since: June 2012
Authors: Yan Xiao, R.Z. Yang
However, properties of glubam are quite different from both timber and steel.
However, it should be noted that because of the different structures and properties of materials, the properties and failure modes will differ a lot.
Geometric notation for bolted glubam board The mechanical properties and the composite structure of glubam is different from wood composites.
As construction material, Glubam’s mechanical properties haven’t yet been standardized.
Bearing properties of Shorea obtusa beneath a laterally loaded bolt.
Online since: December 2003
Authors: K.J. Lilley, Uwe Gbureck, C. Ansell, David Farrar, J.E. Barralet
Keywords: Calcium phosphate cement, β-tricalcium phosphate, brushite, mechanical properties Abstract.
Discussion The strength of cement has an inverse exponential relationship to porosity [6] only if all other factors are constant.
Crystal size, degree of reaction and flaw size and /or distribution all affect the strength of cement.
By understanding the nature of the mechanism giving rise to mechanical strength we may engineer optimised formulations with improved performance.
Online since: October 2023
Authors: Mary Donnabelle L. Balela, Mariz Gebrielle M. Domingo
Introduction Heat stress may negatively impact people, affecting their productivity, health and well-being, and overall economic activity [1].
The most common interlayer for laminated glass is polyvinyl butyral (PVB) due to its excellent mechanical properties.
The thermal insulation properties were evaluated using a handheld industrial thermal imaging camera (Hti HT-18).
Conductivity and thermal insulation properties.
Rethwisch, Optical Properties, in: Materials Science and Engineering An Introduction, ninth ed., NJ, 2014, 843-844
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