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The mechanical and metallurgical properties of the FSSW specimens were characterized to evaluate the performance of the different tools.
Therefore, tool geometry is one of the key factors in determination of bond strength [4, 7].
Lu, Mechanical Properties and Fracture Behavior of Friction Stir Spot Welded AZ61 Magnesium Alloys, Advanced Materials Research 154-155 (2011) 498-507
North, Microstructural features and mechanical properties of AM60 and AZ31 friction stir spot weld, Materials and Design, 31 (2010) 4764–4776
Hu, “Microstructures and mechanical properties in dissimilar AZ91/AZ31 spot welds,” Materials Characterization, 61 (2010) 1018–1028

Producing castings with fine microstructure is generally associated with improved mechanical properties of strength and ductility and with minimal defects such as cracks and hot tearing.
It is the aim of the current work to understand more the effect of the process parameters on the altering the microstructure and mechanical properties.
Properties of 1040CR steel mold and for Al-12.6%Si can be found elsewhere [19, 20].
While the cooling at the mold-casting has improved moderately at a frequency of 500Hz and drastically at 2000Hz, it was concluded that the very small vibration amplitude is the key factor in affecting the heat transfer between the casting and mold.
[19] Metals Handbook, Vol.1 - Properties and Selection: Irons, Steels, and High-Performance Alloys, ASM International 10th Ed. 1990

There are many factors that can affect the engine network performance, such as delay, packet loss and capacity utilization.
It also affects other characteristics of launch vehicle, such as trajectory, flight stability, mechanical properties, etc.
As the main carrier of energy consumption and the main factors of city environmental pollution, realizing its energy saving will become increasingly important.
“Phase shift pulse codes with good correlation properties,” IRE Transactions on Information Theory, vol.
“Polyphase codes with good periodic correlation properties,” IEEE Transactions on Information Theory (Corresp.), vol. 18, no. 4, pp. 531-532, July 2002

Kfs is a critical hydraulic property affecting water flow and solute transport in soil [1,2].
However, in spite of the apparent importance that the variation and influence factors of hydraulic property has in ecosystem functioning, a few studies have described the changes of Kfs along types of sand dunes, and their relationship with soil properties in the Horqin Sand Land of north China.
(b) Is there a better concordance between Kfs and soil properties?
(c) What are the key factors to influence Kfs in sand dunes?
Results and discussion Soil physical and chemical properties The soil mechanical composition is not only the foundation of soil texture classification and naming, but also an important indicator for evaluating the basic properties of soil, such as tightness, porosity.

In order to improve the mechanical properties of A356 aluminum alloy in lost form casting (LFC), vibration and pressure were applied to solidification process of LFC, and the microstructures and the mechanical properties of the castings were compared with that of the castings in LFC without vibration and pressure.
However, the main problems that the wide application of A356 alloy in LFC is limited are the low mechanical properties and high porosities, etc.
In order to improve the mechanical properties of A356 alloy castings, there are the methods often used, such as modified the eutectic silicon, refined the grains, increased the strengthening phase, and heat treatment, etc[2].
Besides the microstructures of the coarse grains, the main defects of A356 alloy castings in LFC, such as pinholes, shrinkage, etc, have a significantly influence on the mechanical properties.
Because the length and diameter of the dendrites growth are affected by the alloy composition, cooling rate, solute diffusion and other factors, the dendrite length or diameter is difficult to control.

Thermo-mechanical reliability evaluation of PLCC packaging Xianghui Guo1, a, Chunguang Xu1,b and Liu Yang1,c 1School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China aguoxianghui1120@163.com, bxucg@bit.edu.cn, cyangliuqing1987@tom.com Key words: thermo-mechanical reliability; PLCC packaging; SAM; FEA Abstract: Thermo-mechanical failure is the main factor to impact the microelectronic packaging reliability.
Firstly, a geometric model of Plastic Leaded Chip Carrier (PLCC) packaging was established and the thermo-mechanical property of PLCC packaging was analyzed using finite element analysis (FEA) software ANSYS.
The defects such as crack and delamination can emerge and grow under the cyclical thermal stress which will affect the reliability of microelectronic packaging.
Firstly, a geometric model of Plastic Leaded Chip Carrier (PLCC) packaging was established and the thermo-mechanical property of PLCC packaging was analyzed using finite element analysis software ANSYS.
(1) A three dimension geometric model of PLCC packaging was established using 3D drawing software Pro/Engineer and the thermo-mechanical property of PLCC packaging was analyzed using finite element analysis software ANSYS

In heat treatment process, the mechanical properties like roughness, strength and toughness from the steel can be controlled.
In this case, the mechanical properties of ISODUR™ steel will be controlled for coining dies by heat treatment process, especially for tempering.
The properties from inter-metallic phase between TiN coating and ISODUR™ steel are also the factors causing micro-cracking.
Changing one of the factors may influence other factors but, it does not constantly influence each dies.
Effect Of Heat Treatment On Mechanical Properties Of H11 Tool Steel.

Abstract. because of the synchronism belts driving has the advantages of vibration absorption, noise reduction, constant transmission ratio, so it is widely used in automotive engine timing driving system, The stiffness and damping coefficients of the synchronous belt is the main factor affecting the synchronous belt transmission in the process of vibration and noise.
Introduction Synchronous belt drive systems rely on the mesh of pulley teeth and synchronous belt teeth to transmit motion and power, Because of the synchronous belt has the advantages of simple structure, low cost, convenient installation, no lubrication, noise reduction ,vibration absorption etc., so it is widely used in industrial drive system and automotive engine timing drive system, Since the synchronous belt is a composite material body which is composed of material strength layer cord and rubber, so synchronous belt with viscoelastic properties in the transmission process, because the impact of shock, in the process of the synchronous belt transmission belt wheel tooth and tooth contact will produce vibration, The horizontal stiffness coefficient and damping coefficient of belt are main factors affecting the transverse vibration in the process of synchronous belt transmission. so this article analyzed tensioning force as a influence on auto synchronous belt stiffness coefficient
Dynamics Analysis Research on Automotive straight tooth Synchronous Belt based on MFBD[J].mechanical transmission,2012,36（9）：25-27
[2] Li Zhan-guo, Shi Yao-chen, Dynamics Stimulation Analysis Research on Automotive Multi-Wedge Synchronous Belt based on MFBD[J].mechanical transmission,2013,37(8):34-37

The factors working on chemical reaction affect the formation in the same.
Introduction Amorphous alloys are expressly concerned by vast number of scientific and technological researchers because of its excellent mechanical properties.
Three factors effecting on amorphous formation have been clarified as main elements [6,7].
The deposition is in better performance with complex properties of co-metal atoms.
The combination will be affected by outside conditions as main factors, but the atom outside electronic shell is crucial gene for the formation.

Microstructural characteristics and creep properties of Mg-5Al-2Si alloys modified with Sn and Sr D.
However, its application is limited to temperature below 120°C due to their rapid degradation of mechanical properties; especially the poor creep resistance attributing to the thermally unstable β phase (Mg17Al12) at elevated temperature [6].
However, the processing of magnesium alloys containing Si is limited to die-casting due to the formation of coarse Chinese script Mg2Si phase, which forms under slow cooling conditions and is quite detrimental to the mechanical properties.
Therefore the modification of Mg2Si particle morphology is needed to obtain the sound mechanical properties.
It can be seen that Sn and Sr addition to the alloy resulted in improving creep properties, and creep properties improved further with increasing the content of Sn.