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Che, Improving mechanical properties of dissimilar material friction welds, Appl.
Muthukumaran, Influence of water cooling and post-weld ageing on mechanical and microstructural properties of the friction-stir welded 6061 aluminium alloy joints.
Sivaprasad, Evaluation of microstructures and mechanical properties of dissimilar materials by friction welding, Procedia.
Shi, Empirical modeling for the effects of welding factors on tensile properties of bobbin tool friction-stir-welded 2219-T87 aluminum alloy.
Kantumuchu, Dissimilar friction welding of AISI 304 austenitic stainless steel and AISI D3 tool steel: Mechanical properties and microstructural characterization.

Optimization of Measuring Points Based on the Grey System Theory for Spindle of Machining Center Changlong Zhao1, a, Xuesong Guan2,b 1 College of Mechanical Engineering, Changchun University，Changchun 130022, China; 2 College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China azhao19790204@126.com, b308989007@qq.com, Keywords: Grey system; thermal error; measuring point optimize Abstract.
There is a reference sequence x0 = {x0 (k) | k = 1, 2, ... , m} and a comparative sequence xi = {xi (k) | i = 1, 2, ... , m}, before calculate the grey correlation coefficient, all of the series standardized data will be processed, this plan can facilitate the comparison in the future, and ensure a equivalence between the factors and the properties of sequence, and ensure the dimensionless and normalized.
Application on grey relational model of temperature field In spindle temperature measuring point of optimization process, introduced the grey relational analysis model, this model can analyze the size of the impact of multiple factors on the main behavior, namely thermal error affecting the spindle temperature measuring point of the most important of the measuring point position, with minimal number of measuring point response to the changes of the temperature field.
Through grey correlation analysis model we obtained the three main factors for the thermal error of spindle.
[6] Yang Jianguo, Deng Weiguo, Ren Yongqiang, Li Yuansheng, DouXiaolong, “Grouping Optimization modeling by Selecting of Temperature Variables for the Thermal Error Compensation on Machine Tools,” China Mechanical Engineering , March 2004, 15(6): 478-481

The gas inclusions factors of influence on the dispersion parameters and, as a consequence, the aggregative stability of foam mixtures, are ranked.
Improving the quality of their industrial production and expanding the operational capabilities can take place only with a scientific understanding of the formation laws of the structure which properties substantially depend on the following factors: - conditions for the raw materials’ homogenization [2]; - mass transfer intensities during the viscous bonds’ predominance period between dispersed gas and solid phases [3]; - individual features of the phase transition from a viscous to an elastic state depending on the raw mixes’ composition [3].
Sychev, Chemistry of solidification and the formation of strength properties of cement stone, Cement. 9 (1978) 9-13
Nagorsky, Influence of the shape of dispersed aggregate particles on the mechanical properties of foam concrete mixtures, CATPID-2019 IOP Conf.
Shmitko, Management of technology processes, structure and properties of concrete, GASU, Voronezh, 2002

The main effect factors of horizontal fracture of cemented carbide core are also analyzed.
Introduction Currently High P-T(High Pressure and Temperature) rheometer is widely used in the Earth's interior material rheological properties and dynamics research [1].
The curve d shows that the different contact types on the two end surfaces of core mainly affect the axial stress nearby.
The bevel of pusher and pedestal is a key factor to affect the axial stress, by which the axial preload can be enhanced at the inner surface of core.
The end pressure and the angle of bevels are the two key factors affecting the axial stress of core and the two reasons leading to the yield of pusher and pedestal.

Thereinto, the characteristics of grain and precipitations are the basic factors to decide the final product property, which can be modified by adjusting deformation technics and heat treatments.
Abundant researches have mentioned the effect of grain size on mechanical property.
The tensile properties were measured by a MTS CMT4304 test machine at a constant speed of 2 mm/min.
Fig. 4 Mechanical property of the three alloys.
Effect of Sc microalloying on microstructure evolution and mechanical properties of extruded Al-Zn-Mg-Cu alloys, Mater.

In particular, the effect of imperfections on the mechanical properties, i.e.
In the following, the results of several investigations on the evaluation of the mechanical properties of CNTs are presented.
They pointed out that the effect of chirality on the mechanical properties and failure mode of CNTs is significant.
Later, Lu and Hu [7] conducted a computational simulation in order to investigate the mechanical properties of CNTs.
Lu, Molecular dynamics study on buckling of single-wall carbon nanotube-based intramolecular junctions and influence factors, Comp.

Compression deformation will cause a micro-spring to buckle, and structural parameters, constraint conditions and structural forms of a micro-spring will affect its critical load and buckling mode.
Several researchers have studied structural forms, properties and detection methods of planar tensile micro-spring [2-4], however, few has researched properties and design methods of compression micro-spring.
Paras Chawla in India Tapaer University has designed a RF micro-mechanical switch [6].
The factors influencing micro-springs' structural stability contain structural parameters, constraints and structural forms.
Although the distance between these two springs constituting the parallel spring L has no effect on spring stiffness, it does affect the spring buckling stability.

Geological conditions, support patterns and bad construction are considered as the main factors of roadway damage and new support method is given.
This mine area is affected by tectonic movement, with semi-arched by the boring straight wall.
Table 1 shows the selection of mechanical parameters.）
Table 1 The table of mechanical parameters of model No.
Stress Distribution Based on the above analysis we can see that the reasons for the roadway deformation can be attributed to the following aspects: The surrounding rock reflects the weak nature of surrounding rock and has strong expansion properties because of large proportion of muddy.

Results of non-destructive tests performed on welded joints are presented in this paper (magnetic particle and ultrasonic inspection), as well as results of destructive tests of the base material and welded joints (testing of tensile properties, impact testing, metallographic analyses of the structure).
For the testing of mechanical properties in the longitudinal (marked as u in figure 4a) and transverse direction (marked as p in figure 4b) of the 40 mm thick metal sheet, circular cutting has been performed in order to obtain a sample with diameter of 380 mm from the internal wall (internal coating) of segment 4-1 of the upper ring of guide vane apparatus, as well as cutting of the 450 mm long sample from the welded joint of the 50 mm thick metal sheet (welded joint V50) for metallographic testing of base material and of the welded joint, or, more precisely, of the material from heat-affected zone and of weld metal from the flange of the upper ring of guide vane apparatus, taken from segment 3-4.
Results of tensile tests showed that tensile properties of base material meet the requirements of standards EN 10002-1 and GOST 14637 for steel St 3 [10], table 2.
Geometrical properties of cross-sections of welded joints of the upper ring of guide vane apparatus, according to project documentation, are presented in fig. 3.
[11] EN 10164, Steel products with improved deformation properties perpendicular to the surface of product - Technical delivery conditions, 2004

The presence of these pores creates stress raisers which can lower the mechanical properties of the composite, and is therefore undesirable.
Transformation Volume Change (%) β-quartz  α-quartz 0.82 - 1.3 Α-quartz  α-tridymite 14.4 - 16.0 α-quartz  α-cristobalite 15.4 - 17.4 γ-tridymite  α-tridymite 0.4 - 0.5 β-cristobalite  α-cristobalite 2.0 - 2.8 Factors Affecting the Crystallization Rate of Fused Silica.
Carbon-carbon composites have superior mechanical properties and are able to retain these even at elevated temperatures of up to 3000oC.
Hench: Physical Chemical Factors in Sol--Gel Processing.
[132] Crivelli-Visconti, I., Cooper, G.A., Mechanical Properties of a New Carbon Fibre Material, Nature, 1969, 221(5182): p. 754-755