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Online since: August 2021
Authors: Alexey V. Stolbovsky, Polina Y. Shirshova
It has also been shown that the average grain size formed by the SPD is a determining factor in the strength properties of these alloys; an increasing Hf concentration in the copper matrix is not always a condition for higher hardness values.
The values of the calculation results affecting the estimation of the Cu5Hf phase precipitation and that obtained from the experimental diagram are similar enough.
Therefore, it can be concluded that for the Cu-Hf system, the grain size formed by SPD is the determining factor that affects the hardening of these alloys.
However, higher concentrations of hafnium dissolved in the copper matrix will be determinative of higher mechanical properties when the dispersion hardening of the alloys is realized.
Dobatkin, Structure and properties of Cu-Cr alloys subjected to shear under pressure and subsequent heating, Russian Metallurgy (Metally). 2010 (2010) 1046-1052
Online since: July 2013
Authors: Kari Mäntyjärvi, Antti Määttä, Antti Järvenpää, Matias Jaskari, T. Kiuru
However, the properties achieved are dependent on several process parameters.
By using LLHT, it is possible to tailor mechanical properties locally, e.g. to produce softened or hardened ultrafine grained (UFG) areas for subsequent forming [3-5].
Laser radiation is absorbed on the surface of the sheet, causing temperature gradient through the cross-section and leading to non-homogenous mechanical properties [1].
In thermographic camera measurements the emissivity factor is depended on surface properties of the sheet, but also on temperature.
The laser light absorption into a material depends on several factors, such as temperature and surface finish, and varies between 40-80%.
Online since: August 2021
Authors: Svetlana V. Lapshina
In their purest form, polymers mostly don’t have the desired properties, which is why special additives (fillers, plasticizers, dyes, stabilizers, etc.) must be added to obtain the desired functional properties.
The alignment of reinforcements gives rise to the anisotropy of properties.
Gabibullayev, How Some Factors Affect the Anisotropy of Elastomeric Fiber Fillers, Proceedings of the IV Russian Conference on Materials for the Rubber Industry, Kauchuk i Rezina. 1 (1988) 187-189
Dubinker, How fiber reinforcements affect the anisotropy of mechanical properties of rubbers used in V belts, Kauchuk i Rezina. 7 (1973) 28-30
Gabibullayev, How Some Factors Affect the Anisotropy of Elastomeric Fiber Compositions, Kauchuk i Rezina. 1 (1998) 2-4
Online since: February 2021
Authors: Baker Alzaidy, Baker Muthanna Abod
Study Bharath et al. (2014) [4] indicated several attempts to link the erosion and mechanical and physical properties of the target material.
The chemical analysis and Mechanical properties of the AA6063-T6 were carried out in (The State Company for Inspection and Engineering Rehabilitation (SIER), formerly (the specialized institute for engineering industries) and Standard specifications were presented in Table (1) and Table (2) respectively.
Table (1) Chemical Composition of ( AA6063-T6) Al Ti Zn Cr Mg Mn Cu Fe Si Element % Bal. 0.1 0.1 0.1 0.4-0.9 0.1 0.1 0.35 0.2-0.6 Standard [11] Bal. 0.007 0.001 0.02 0.6 0.01 0.004 0.17 0.45 Measured(SIER) Mechanical properties Table (2) Mechanical properties of (AA6063-T6) [12] RA % E(MPa) T. strength (MPa) Hardness HB Properties 8-11 (68-74)*103 240-250 73-85 Standard [12] 10 70*103 245 80 Measured(SIER) Inflate strength =100 MPa Fatigue Test Procedure Specimen Perpetration Fatigue test specimens shown in (Fig. 1) were manufactured according to the (Avery 7305) device which specially used for flat specimen with the required accuracy and in two groups.
Auradian , Preparation of 6061Al-Al2O3 MMC’s by stir casting and evaluation of mechanical and wear properties, Procedia Materials Sci. 6(2014) 1658-1667
Al-Alkawi, Influence of cryogenic temperature (CT) on tensile properties and fatigue behavior of 2024-Al2O3 nanocomposites, Materials Sci. and Engineering J.,765(2020) 012052
Online since: October 2011
Authors: Yu Yan Li, Xie Qing Huang, Fu Lin Li
Introduction In recent years, with science and technology’s development, neural net was taken account of in the field of predicting properties of material.
Density and shape factor were two key influencing factors of nonlinear constitutive relationship of metallic rubber.
States of neurons in each layer would affect states of neurons in next layer.
[11] Gibson L J, Ashby M F, “Cellular Solids: Structures and Properties,” [12] London: Cambridge University Press, 1997
Ashby, “The Mechanical Properties of Cellular Solids,” Metallurgical Transactions A, vol. 14A, pp. 1755~1769, September 1983
Online since: June 2016
Authors: Ravinder Kataria, Jatinder Kumar
The tool material should possess mechanical properties such as high wear resistance, good elastic and fatigue strength.
For MRR, three factors were significant- work material (79%), tool geometry (10.86%) and grit size (5.50%).
They concluded that spindle speed and feed rate were the most significant factors which affect edge chipping.
The model shows that static load, grit and concentration of abrasive, rotation speed of tool, feed rate and work material properties affect the material removal rate in rotary ultrasonic machining.
Tool materials must have an optimal combination of mechanical properties because these properties affect the productivity of the process.
Online since: December 2010
Authors: Ji Tao Yao, Lei Jiang, Ren Xin, Wei Li
However, these models do not pay attention to the mechanical properties of concrete after carbonation.
For example, concrete constitutive relation after carbonation, the mechanical properties of concrete after carbonation, and so on.
Secondly, they study the mechanical properties of concrete materials affected by the pure sulfate or chloride chemical attack and also analyze the changed rules of the elastic modulus and other mechanical index and the micro-mechanism of concrete deterioration.
The method, multi-index weighted grade durability evaluation method, considers fully the various factors affecting the durability.
Many factors affect the structural durability.
Online since: February 2015
Authors: Jui Pin Hung, Fu Tsai Chiang, Chuan Shao Wu
No apparent correlations are found among clinical BMD and mechanical properties, implying that the BMD is an invalid indicator of the bone properties.
Basically, changes in bone constituents and micro architecture may result in the variation of the bone properties [3].
It is obvious that a variation in structural organization or ingredients of bone will result in changes in mechanical properties and the influence on the mechanical properties due to the change of individual parameter is quite different.
For example, Wang and Feng [17] applied composite material theory to show that the mineral phase is designed to sustain the forces on the bones, and that it contributes to the bone’s mechanical properties such as stiffness and strength.
Study of Wang [19] indicted that the fracture toughness of baboon bones was shown to vary with the ages, but the variations were irrespective of change in bone porosity and BMD with the ages, which demonstrated that other factors apart from mineral density and porosity may affect the variation of fracture toughness.
Online since: February 2011
Authors: Yi Qiang He, Na Wang, Zhen Hua Chen
Table 2 presents the mechanical properties at ambient temperature of the samples at different states.
Table 2 Ambient temperature mechanical properties of Al-8.5Fe-1.3V-1.7Si/15vol.
Additionally, stronger particle-matrix bond was a significant factor contributing to the excellent mechanical properties of the composite as rolled after hot pressing.
And the composite sheets of large dimensions and excellent mechanical properties were obtained
The more excellent mechanical properties can be attributed to the three aspects above.
Online since: June 2013
Authors: Y.S. Kuo
Kuo Department of Mechanical Engineering ChienKuo Technology University No.1, ChiehShou N.
All the factors will be discussed in this study to find out the influence on the porosity content.
Berry, “A Reexamination of Factors Affecting porosity Gradients in Unidirectionally Solidified Samples,” AFS Transactions, Vol.116, pp.157-168, 2008
Kuo, “Mechanical Properties and Porosity Content of A201 Aluminum Alloy Castings in Different Cooling Rate Sand Molds,” Advanced Materials Research, Vols. 154-155, pp.787-793, 2011
Berry, “Effects of Solidification Conditions on Mechanical Behavior of Al Cast Alloys,” AFS Trans.
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