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Online since: October 2004
Authors: Fang Hong Sun, Ming Chen, Z.Y. Wu, Jing Wen Zhong
High speed milling of SiC particle reinforced aluminum-based MMC with coated carbide inserts Sun Fanghong 1.a , Wu Zhenyu 1,b, Zhong jingwen 1,c , and Chen Ming 1,d 1 School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China, a sunfanghong@sjtu.edu.cn,b wzy124@sjtu.edu.cn,c happyzjw@sjtu.edu.cn, d mchen@sjtu.edu.cn Keywords: SiC particle reinforced aluminum-based MMC, High-speed milling, Cutting forces, Cutting temperature, Surface roughness Abstract.
Metal matrix composites (MMC) have many advanced mechanical properties such as high wear resistance, low weight, high strength and stiffness, lower expansion coefficient and high thermal conductivity, which are widely used in the automotive, railway and aerospace industries.
Owing to such better characteristics, automotive, aerospace and train companies hope to replace steel and cast iron in mechanical components with lighter aluminum-based MMCs.
This factor prevents more manufacturers from embracing MMC technology.
The cutting speed affects the cutting force in three main factors:(1) The addition of SiC particles will hamper the rapid ductility of the aluminum matrix alloy in high speed milling process; (2) High speed cutting leads to an obvious increasing of the number of SiC particles which can be shifted, cut through, and pulled out; (3) High speed interrupted milling leads to the high abrasion rate between high hardness SiC particles and cutting tool edges.
Online since: October 2010
Authors: Giovanna A. Massari, Francesco Gadotti, Mariapaola Riggio
Mechanical and Structural Engineering (DIMS), University of Trento, Trento, Italy 3 Ma.de.
Economical reasons could have affected the mentioned technical choices, as well as that of using second-hand timbers.
Local mechanical damages were found, where decay already reduced the resistance of the material.
Mechanical material properties were assumed by visual strength grading (EN 338:2004).
The truss failure was caused by a combination of these factors.
Online since: September 2023
Authors: Vamsi Krishna Pasam, Gamidi Kartheek, Suryachandra Rankireddy, Lingaraju Dumpala
Introduction Ti6Al4V is widely used in aerospace, missiles, aviation and automotive industries because of its mechanical properties like high strength to weight ratio, corrosive resistance and ability to withstand elevated temperatures.
Cutting speed and amplitude were the most influencing factors in cutting force reduction.
Interaction of cutting speed and feed rate were the most influencing factors.
Factors and their levels Factor Level 1 Level 2 Level 3 Cutting speed (V) [m/min] 10 30 50 Feed rate (f) [mm/rev] 0.051 0.103 0.161 Depth of cut (d) [mm] 0.1 0.2 0.3 Amplitude (a) [µm] 20 22.5 25 Fig 1.
With the increase in depth of cut, surface roughness is not much affected.
Online since: January 2014
Authors: Zaliman Sauli, Vithyacharan Retnasamy, Nooraihan Abdullah, K. Anwar, Nurhafizah Ramli, They Yee Chin
Its properties attracted more researchers to research and apply it into many fields of study.
The growth methods of BST thin films significantly affect the crystallinity, thin film grain size and dielectric properties[3, 6].
As the grain size increase, it could be a positive factor to dielectric tunability[10].
Mansingh, "Dielectric properties of sol–gel derived barium strontium titanate thin films," Thin Solid Films, vol. 516, pp. 1656-1662, 2008
Fang, et al., "Effect of annealing on the structural and mechanical properties of Ba0.7Sr0.3TiO3 thin films," Materials Science and Engineering: A, vol. 426, pp. 157-161, 2006
Online since: August 2013
Authors: Shao Quan Li, Yi Fu Liu, Feng Wang, Guo Hong Nie, Qing Song Li
Gas pressure error.Currently, most scholars generally believe that coal and gas outburst is the result of synthetic action of situ stress, gas pressure and the mechanical properties of coal, and it is also high-speed release of a great deal of latent energy accumulated in surrounding rock and coal.
However, the following influencing factors will all affect the final manometry results in the process of on-site manometry: ⑴ Objective factors ① Well location: manometry drilling is arranged around the open-type structural belt in unknown faults, fissures, aquifers, caves and other conditions.
Gas can not be connected to pressure gauge, and gas pressure can not be accurately measured if pressure hole or piezometer tube is clogged. ③ Mining-induced or unloaded pressure influence: the measured pressure is clearly not the original gas pressure if pressure measurement points are arranged in the mining-induced or unloaded pressure belt of other coal seams. ④ Other factors: roadway layout constraints, continuous pressure measurement time and other factors also have some impact on manometry results. ⑵ Subjective factors: some mining units take an uncooperative attitude in order to avoid their mines being identified as coal and gas outburst mines and reduce the cost of investment in safety so that it is difficult to carry out site work.
Thus, the quality of identification is affected.
There is no clear explanation on which factors play a leading role as well as the interrelations among various factors during the outburst process, so a unified complete quantitative theoretical system can be not formed.
Online since: July 2007
Authors: Jun Ying Chen, Jin Wang, Nan Huang, Yong Xiang Leng, Guo Jiang Wan, An Sha Zhao, Ping Yang, Hong Sun, X. Wu
Polymer surface modification by plasma shows significant improvement of the anti-platelet adhesion behavior as well as of the anti-bacterial properties. 1.
Stainless steel, titanium alloys and low temperature isotropic pyrolytic carbon are frequently applied as load-bearing cardiovascular biomaterials for making artificial heart valves, stents, ventricular pumps, etc., due to the advantage of their superior mechanical properties.
Therefore it is a key issue to improve the antithrombogenic properties and antibacterial properties.
Anticoagulation and antibacterial properties are simultaneously significantly improved, as shown in Fig. 5 and Fig. 6.
Immobilization of chitosan on PET improved the blood compatibility and antibacterial properties of PET.
Online since: June 2014
Authors: Cosme Roberto Moreira Silva, José A. Araújo, Palloma V. Muterlle, Alexander H. Franco, Jorge L.A. Ferreira
This TNZT has excellent non-toxic components with good mechanical properties and workability [5 - 7].
Fatigue performance is one of the most important mechanical properties for biomaterials because, in general, these materials are used under cyclic loading.
TABLE 1 MECHANICAL PROPERTIES OF TI 35NB 7ZR 5TA.
Nevertheless, those pores could affect the mechanical properties, hence, should be controlled.
Design and mechanical properties of new β type titanium alloys for implant materials.
Online since: November 2009
Authors: Yuri Estrin, T.D. Rostova, Valerij V. Zakharov, O.G. Ukolova, Sergey V. Dobatkin, A. Tchirkova
The effect of equal channel angular pressing (ECAP) on the structure and mechanical properties of Al-4% Mg-1.5% Mn-0.4% Zr and Al-4% Mg-1.5% Mn-0.4% Zr-0.4% Sc alloys in the initial as-cast state was studied.
Scandium addition to aluminum alloys, in particular Al-Mg ones, causes significant changes in their structure and properties [10-17].
The purpose of this work was to elucidate whether the presence of Sc is important in an Al-MgMn-Zr with regard to structure and properties of ECAP processed alloys.
To that end, we have studied the structure and properties of the cast Al-Mg-Mn-Zr and Al-Mg-Mn-Zr-Sc alloys after the equal-channel angular pressing (ECAP).
Dobatkina: Advanced Aluminium Alloys Containing Scandium: Structure and Properties (Gordon and Breach Science Publishers, Amsterdam, The Netherlands 1998)
Online since: August 2017
Authors: Claudia Mehedințu, Elvira Brătilă, Ana Maria Rotaru, Marina Antonovici, Mihaela Plotogea, Roxana Bohîlțea, Costin Berceanu, Oana Ionescu
Based on their biomechanical properties, we present our experience with mersilene tape used as treatment for cervical incompetence.
The mechanical properties of cervical tissue are derived from its extracellular matrix and its most important constituent the fibrillar collagen, alongside other constituents such as proteoglycans, hyaluronic acid, elastin, and water.
The mechanical properties of the cervical tissue are derived from its extracellular matrix and its most important constituent the fibrillar collagen, alongside other constituents such as proteoglycans, hyaluronan, elastin and water [11].
In terms of selecting the most appropriate tape type to use for cervical cerclage, some factors must be taken into consideration.
House, DL Kaplan, S Socrate, Relationships between mechanical properties and extracellular matrix constituents of the cervical stroma during pregnancy, Semin Perinatol. 33(5) (2009) 300–307
Online since: November 2025
Authors: Ihsan Ali Obaid, Mustafa Hamid Abd
Mineral filler physical properties.
Modified bitumen properties.
HMA volumetric properties and Mechanical characterizes of the mix at optimum binder content.
HMA volumetric properties Mechanical properties of the mixes at modified and optimum binder content.
Propertyy Test methods Result of test Mechanical properties Marshall Stability 16 KN Marshall Flow 2.9 mm Air void% 3.75 Volumetric Properties V.M.A% 17.4 VFA% 75 5.2 Marshall Stability Test The results are visually displayed and represented graphically.
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