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Online since: July 2004
Authors: Alain Reza Yavari, Manuel François, Tarek Benameur, B. Guelorget, K. Hajlaoui
It has been confirmed that some metallic glasses have a unique combination of various properties and are suitable for many applications [4].
Further details on the evolution of the inhomogeneous deformation in the Zr-based metallic glasses at the submicron scale are deduced from nanoindentation tests as well as changes in mechanical properties.
Mechanical properties were assessed by nanoindentation using a nanoindenter XP/ MTS equipped with a continous stiffness measurement CSM option.
Moreover,. the main equatorial instrumental factors (detailed in ref [24]) affecting the diffraction-line profile and position are accomplished numerically.
Hence, we can estimate the order of magnitude of the variation affecting peak position due to a surface with rugosity such as 'pile-up' and deep impressions on ribbon's surface.
Online since: March 2009
Authors: Wolfgang Bleck, W. Chuaiphan, B. Sornil, Somrerk Chandra-Ambhorn
The high-temperature corrosion of this weldment could be one of the factors of the failure.
Since the selection of consumable plays a critical part in the improvement of the weldment properties, particularly the corrosion one, three different consumables were used.
The relationship between microstructure and properties, in both mechanical and corrosion aspects, of the weldments produced by different consumables were investigated for the purpose of selecting the most appropriate.
Mechanical testing.
Ningshen, in High �itrogen Steels and Stainless Steels: Manufacturing, Properties and Application, edited by U.K.
Online since: September 2013
Authors: Joao P. Nobre, António Castanhola Batista, Altino Loureiro, Maria José Marques, Luís Coelho
Financial factors, as well as the ease of machining ferritic steel, justify this manufacturing option.
Experimental Results The typical cross section microstructure of the weld cladding samples is shown in Fig. 2, where three clad layers, heat affected zone (HAZ) and unaffected zone of the substrate are distinguishable.
The clad (three layers together) has an average thickness of 9.4±0.5 mm and the thickness of the heat affected zone (HAZ) is 2.2±0.4 mm.
These residual stresses should correspond to the milling affected zone created by the mechanical processes applied in the sample surface.
This increase in compressive stresses with heat treatment temperature is related to the differences in the physical properties of carbon and stainless steels.
Online since: October 2009
Authors: Yong Xian Liu, Ping Zou, Dong Sheng Tian, Gong Qi Cai
In Figure 1, it is that the entity model which is drawn by Pro/E is imported the to ANSYS software.Some parts need substitute for equivalent element which their physical properties are showed the element's real constant.
For the local system ,the hole diameters of bearing are individual 20mm, 40mm and their corresponding factor are 0.5,0.8.
After defining entity model, we begin to choose element type and determine real constant and define material properties and mesh models.
For the structure of PKM is made of steel, the material properties of PKM can easily define.
The viewpoint of modal analysis theory is that natural frequency and fundamental mode of mechanical system has only connection with mass distribution and rigidity character of mechanical system and has nothing with outside factor.
Online since: December 2014
Authors: Deivid Marques Nunes, Fábio de Oliveira Arouca, João Jorge Ribeiro Damasceno
Introduction Due to the high level of air pollution caused by combustion of fossil fuel and the growing fleet of motor vehicles, among others, associated with several factors, such as industrial, urban and technological development, since the Industrial Revolution to the present day, it has been noted the need to study mechanisms and operations to minimize the environmental impact (poor air quality), and, consequently, the appearance of occupational illnesses.
(11) With, K is the Boltzmann constant, T is the temperature is the gas viscosity, is the Cunningham slip correction factor and P is the local pressure.
The Cunningham slip correction factor can be given by:
Hinds: Aerosol Technology Properties, Behavior and Measurement of Airborne Particles.
Hinds: Aerosol Technology Properties, Behaviour and Measurement of Airborne Particles.
Online since: November 2006
Authors: Yi Dong Yuan, Min Xia Fan, He Jun Li, Ke-zhi Li
Abstract: Tensile properties and fracture morphologies of C/C composites used as aircraft brake disc at different heat treatment temperature have been studied.
In the course of manufacturing C/C composites brake disc, heat treatment is a very important working procedure, which affects the property of C/C composite material directly[3-5].
Tensile mechanical property test was conducted for C/C composites after heat treatment at different temperature, and fracture morphologies of tensile sample were observed with SEM. 2.
Under the protection of argon gas, five samples marked as A, B, C, D, E, were heat treated at 2000�, 2300�, 2400�, 2500� and 2650� for 2h respectively. 2.2 Mechanical property testing Tensile test was performed with an MTS880-50KN universal testing machine (US) Loading velocity was kept at 1mm/min, and the environment temperature and humidity were 20�and 50% respectively.
e2 e3 e1 a3 a2 c2 a1 c1 c3 With increase of heat treatment temperature continuously, mechanical property of carbon fiber continues to decline and microstructure of C/C composites will change largely.
Online since: September 2023
Authors: Eleandro Lima, Carlos Relvas, António Manuel Ramos
Several aspects were already studied in that technology and influence whether the mechanical properties of the part, the thickness of the layer is one of the factors that has the greatest effect on the part and can easily be adjusted and controlled but depend of the powder size [5].
Other works study the effect of anisotropy in sintering parts and observe a variations around 1mm depending of several factors [8].
Figure 4- The profile of temperature in debinding and sintering Parts configuration in production Shrinkage is a complex process, caused by factors such as the thermal strain, friction and gravity during sintering.
Cristofolini, “Dimensional and geometrical precision of parts produced by binder jetting process as affected by the anisotropic shrinkage on sintering,” Addit.
Mostafaei et al., “Binder jet 3D printing—Process parameters, materials, properties, modeling, and challenges,” Prog.
Online since: January 2019
Authors: Fedor Simankin, Jan Miciński, Evgeniy Shumnyi, Alexander Shtein, Ablay K. Zhunusov
In addition, a housing protects a user against electric trauma and other negative factors arising during operation of the electronic equipment.
Drawing attention to the fact that in the case of a multi-filament extrusion line, the product can be obtained from several materials with different properties, the use of 3D printing in housing making seems to be very promising.
The safety factor is used for comparison.
Red color indicates areas with thermally conductive properties Table 1.
[11] Lucie Trhlíková, Oldrich Zmeskal, Petr Psencik Pavel Florian, Study of the thermal properties of filaments for 3D printing, AIP Conference Proceedings 1752 (2016) 040027, doi: 10.1063/1.4955258 [12] D.
Online since: July 2014
Authors: Xiong Zhang, Wei Liu
Table 2 Q345 steel material properties Yield stress (MPa) Plastic strain Young's modulus Poisson's ratio 261.0 0.001267 2.060E+05 0.3 273.0 0.00157 3.961E+04 0.3 288.6 0.02480 6.715E+02 0.3 313.5 0.03300 3.049E+03 0.3 398.5 0.06000 3.144E+03 0.3 Figure 5 Ribbed high-strength bolt connection Figure 10 Bolt connection failure Table 3 Friction type high-strength bolts of material properties Yield stress(MPa) Plastic strain Young's modulus Poisson's ratio 618 0.00000 2.1E+05 0.3 940 0.003 — 0.3 1040 0.005 — 0.3 Leads of the formula and definition on specific parameter.
In view of the above errors control, is recommended for use of 2.5 (6) when an access to a safety factor of 1.25.
In consideration of the safety factor, has very realistic design engineering significance of this formula with the guidance of the node.
[2] Yu-xia ZHAO,The Reasch On Semi-rigid properties of T Steel Connections,Xi'an, Southwest Jiaotong University, 2007
A Comparative Study of Steel Frame Joints angle measurement method and the mechanical model.
Online since: April 2013
Authors: Samion Syahrullail, Jazair Yahya Wira, W.N. Fawwaz, Wan Nik Wan Mohd Norsani
For each load, the tribological properties of RBD palm olein were compared with the properties of additive-free paraffinic mineral oil.
Following the completion of the wear test experiments, the ball wear condition and lubricant properties were observed.
There are several factors that affect the biodegradability of a substance, including the molecular structure, chemical properties and environmental conditions [1].
These oils all have excellent lubricating properties, load carrying capacities, and corrosion protection properties in comparison with mineral oil [3].
Conclusion RBD palm olein has better performance properties in terms of friction reduction (coefficient of friction) and wear resistance (anti-wear properties).
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