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Especially the influence on the bonding conditions and the mechanical properties of the joints has been investigated.
It was shown that intermetallic phases, in particular Fe2Al5, may have a positive effect on the mechanical properties of the joint.
One main result of their investigations was the existence of a thin layer of an intermetallic phase in small regions, which seemed to have a positive influence on the mechanical properties of the joints.
[5] Venkateswaran, P.; Reynolds, A.: Factors affecting the properties of Friction Stir Welds between aluminum and magnesium alloys, Materials Science and Engineering: A, 2012, 545, pp. 26–37
[18] Lienert, T., 2007: Microstructure and Mechanical Properties of Friction Stir Welded Titanium Alloys.

b Department of Mechanical and Manufacturing Engineering, University Putra Malaysia, 43400 Serdang, Selangor, MALAYSIA.
Defect will harm the assembly tend to affect the performance of the part.
Cold forging, one of the net-shape manufacturing processes is governed by many factors such as friction, parts geometries, die shape and temperature setting of the die and workpiece.
Pin Embossed hole Before After Fig. 1: The pin head before and after embossing An aluminum alloy (AA6061), with thickness 3 mm was used as an embossed material, and its properties used in the FEM simulation were listed in Table 1.
Table 1: Material properties of the workpiece and punch Parameter Workpiece Die/Punch Material type AA 6061 AISI D2 Modulus Young (GPa) 68 210 Poisson ratio 0.35 0.33 Punch Die Workpiece (a) (b) Fig. 2: The schematic model of the embossing process at the initial position.

Also, models with prefabricated crack with different size and textile density are respectively built to find factors that affect tearing behavior and strength of envelope material.
Table 1 The mechanical parameters of specimens Thickness (mm) Fiber bundle density(root/cm) Yarn density (tex) Material areal density (g/m2) 0.16 10*10 220tex 130 According to textile tearing standard, standard samples with initial crack (along the weft direction) were respectively cut and every kind includes three samples.
Combined with analysis model, different experiments, under the same yarn bundle section and break strength, were done to further understand the mechanism, that different initial crack width and different Vectran fiber yarn bundles affect the tearing strength, and the experimental tearing strength is expressed in figure1 and figure 2.
Current Status of Research on Flexible Materials Aging Properties in Space Environment.
Study on the Microcosmic Mechanical Property of Stratosphere Airship Composite Envelope.

In order to study the influence of scanning interval on the polishing effect of S136D die steel, the single factor experiment method is used in this paper.
The influence of scanning distance on the surface roughness of S136D die steel is studied by the single factor method.
In order to better study the influence of the filling distance on the surface morphology of the sample, the laser power, scanning speed and other factors remain unchanged in the experiment.
[4] Chang-Shuo Chang,Ting-Hsuan Chen,Tse-Chang Li, et al.Influence of laser beam fluence on surface quality, microstructure, mechanical properties, and tribological results for laser polishing of SKD61 tool steel[J].Journal of Materials Processing Technology,2016,229:22-35
[5] Chang-Shuo Chang, Chen-Kuei Chung,Jen-Fin Lin.Surface quality, microstructure, mechanical properties and tribological results of the SKD 61 tool steel with prior heat treatment affected by the deposited energy of continuous wave laser micro-polishing[J].Journal of Materials Processing Technology. 2016,234:177-194

Subhash et al experimentally investigated the friction welding of austenitic stainless steel and low alloy steel and the microstructure and mechanical properties are studied.
Sathiya et al investigated the dissimilar materials of austenitic stainless steel and ferritic stainless steel were studied by different mechanical properties exhibited by friction processed joints which exhibits better properties when compared to the fusion processed joints.
Many literatures are analyzed by means of Taguchi method with effect of friction welding on dissimilar materials by studying mechanical properties [7-11].
Experimental factors and their levels Factors Levels 1 2 3 Friction pressure [MPa] 22 33 43 Upset pressure [MPa] 65 87 108 Rotational speed, [rpm] 500 1000 1500 Burn-off length, [mm] 1 2 3 Fig.1.
Yang, “Impact toughness and fracture analysis of linear friction welded Ti–6Al–4V alloy joints”, Materials and Design 30 (2009) 2128–2132 [2] G Subhash Chander , G Madhusudhan Reddy , A Venugopal Rao, “ Influence of rotational speed on microstructure and mechanical properties of dissimilar metal AISI 304 - AISI 4140 continuous drive friction welds”, Journal of Iron and Steel Research, International. 2012, 19(10): 64-73 [3] Sathiya.P, Aravindan.S, Noorul Haq.A, “Effect of friction welding parameters on mechanical and metallurgical properties of ferritic stainless steel”, Int.J.Adv.Manuf Technology (2007). 31: 1076-1082

Analysis of the statusquo CNC lathe machining, influenced by the traditional ordinary lathe, in the review of existing machining dimension, dimension dispersion, groove size discrepancies exist, machining parts contour elements incomplete phenomenon, these phenomena cause problems in numerical control machining size need to be retranslated, multiple tool change, thus affecting the preparation procedures and processing program of NC machining process, influence of NC turning machining quality and efficiency.
Because under normal circumstances, parts of the annotation in the design size, mainly consider the part design and assembly and other factors, often using partial dispersion dimension marking method, as shown in Figure 2a) dimension shown partial dispersion method for labeling, and such dimensioning methods will give processing arrangement of follow-up and NC programming inconvenience, programming needs of conversion parts size, that is not conducive to simplify the determination of the origin of NC program is not conducive to the NC program.
Analysis of parts provided by the blank material mechanical properties and heat treatment, casting quality and machined parts blank material hardness, whether there is a white, sand, porosity, the degree of difficulty to judge its processing, so as to provide basis for the selection of tool materials and cutting amount.
Because the program origin is the start point and end point coordinate NC programming, the difficult easy degree so the right choice it directly affects the machining accuracy and the coordinates of the points computed part, in the choice of programming origin should try to make the design datum and technology base program origin and pattern on the weight, in order to reduce the standard error is not coincidence, and program origin selection should also make the programming size computation is simple, the machining error caused by the factors should be minimum, measuring position is more convenient etc..
Mechanical research and application.2002.9 [2] Maofa Hua.

Experiment research on mechanical behavior for latticed concrete-filled steel tubular tower with three limbs Bin Li1,a, Zhongzhou Han1,b and Chunyan Gao1,2,c 1 Aerding Avenue 7, The Inner Mongolia University of science & technology, Baotou, 014010, China 2 Yudao Avenue 29, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China abtlibin@189.cn, bhanzhongzhou23@163.com, cgao-197844@163.com Keywords: Latticed, Wind turbine tower, Concrete-filled steel tube, Mechanical behavior Abstract.
The stress mechanism and failure process, hysteretic properties, bearing capacity and energy dissipation capacity were studied by quasi-static test on the tower model.
In our country the earthquake action is frequent, with the increment of the wind turbine capacity on tower top, the quality on the tower top are more and more larger and the inertial force of the tower also increase correspondingly, In high earthquake-intensity areas the seismic load has already become an important factor that can not be ignored in the tower design [1-2].
From the mechanical point of view, cone cylindrical tower is a spatial thin shell, which has the advantages such as simple and beautiful shape, clear force transfer system, easy maintenance; But with the large-scale development of wind turbine, its bottom diameter will more and more be affected by local transportation conditions (such as bridge height limit).
(3) The latticed CFST tower with three limbs has excellent seismic behavior and mechanical performance, and there is the value to further research and popularization.

Structure and magnetic properties of strontium hexaferrite nanopowders prepared by mechanochemical synthesis C.
The magnetic properties of hexaferrite nanopowder, both compacted and dispersed in a nonmagnetic matrix were determined.
The magnetic properties of such powders vary from one material to another.
Generally, the coercive field seems to be the most affected property by factors such as particle size and defects introduced during preparation.
The magnetic properties (coercive field and saturation magnetization) of the synthesized nanopowders by mechanical activation were measured at room temperature.

Vegetal fibers, due to their renewable aspect and their mechanical properties are important candidates to achieve excellence in the use of geotextiles.
The degradation effect is analyzed based on the mechanical behaviour of each fiber type after exposition to the degradation factors.
Moreover, the fibers have been subjected to natural degradation factors and to lab aging agents, using a QUV equipment.
Some of the properties of these fibers are shown in Table 1.
Indutrial Applications of Natural Fibres: Structure, Properties and Technical Applications, John Wiley & Sons, Ltd, 2010, pp. 10–48.

There is considerable industrial significance to understand the nature of subsurface deformation under the machined surface for correct prediction of surface properties in machined components based upon the machined conditions and material behaviors that give rise to them.
Sometimes, improper selection of machining parameters would induce unexpected subsurface properties which would lead to the large initial wear of machined surface [1,2].
He further considered that the heat flux into the workpiece, contact time, and quenching rate are the key factors, with increasing temperature, time, and quench rate leading to a higher hardness being generated.
Plastic deformation of subsurface can create significant alteration in the mechanical properties of the material in this region as the result of elongation of the grains or strain hardening, and metallurgical (phase) changes.
The mechanical properties of machined subsurface layer are often evaluated by micro/nano hardness measurement in the region.