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Crystal vacancy is one of the most important reasons for elasticity phenomenon of steels, which results in the fact that the Young's modulus is affected by pulling rate.
Introduction Young's modulus is one of the basic mechanical properties of metal materials.
It can not only represent the ability of elastic deformation resistance of materials but also affect the property of deformation springback of workpieces.
So the factors affecting the Young's modulus are very significant.
(Mechanical Industry Press, Beijing, 1999) [2] Liu Yang: Rare Metal Materials and Engineering.

So the load factor and the productive efficiency are high.
Aircraft titanium alloys parts demands excellent mechanical properties, and welding repair problem are brought to the fore.
Compared with the traditional welding processes, laser welding has advantages such as high energy density, low heat input, high weld speed, good microstructural and excellent mechanical properties.
Because of the active chemical properties of titanium alloys, harmful gases such as oxygen, hydrogen and nitrogen would easily be absorbed during welding, and mechanical properties of the joint would decrease obviously.
Because of the advantages of excellent mechanical properties and corrosion resistance, superalloys have been widely applied in aviation and aerospace fields.

An experimental design was used to investigate the interaction of enzyme dosage and contact time on the beatiability, and both factors were investigated at three levels.
The measurements of beating degree and handsheet properties were following the TAPPI methods.
The dosage of enzymes and the contact time are the main limiting factors affect the application of enzymes.
Effect of enzymatic treatment on the handsheet properties.
The enzyme dosage and enzyme contact are the main factors affect the physical properties of the pulp.

Introduction Magnetic carbon nanotube composites, with excellent thermal and electrical properties and mechanical strength, have great application potential in catalytic carrier, separation technology and sewage treatment[1-3].
The adsorption properties of the materials can be greatly improved by changing the structure[4-7].
Condition optimization of influencing factors.
According to the data analysis of single factor test, this orthogonal test selects L9 (34) orthogonal table, three relevant factors and the corresponding three levels.
Hu, Preparation and properties of controllable nanometer Fe3O4 magnetic composites.

Then import assembled model to the ANSYS software, material properties as defined in Table 1.
Spindle, tool holder and tool material properties Material properties Component Spindle HSK63 A type holder Tool Density(ρ)/kg/m3 7850 7830 8000 Modulus of elasticity(E)G pa 206 210 500 Poisson's ratio(μ) 0.3 0.3 0.25 Meshing the model, the used element shape for the model is the 10-node tetrahedral.
Simplify before and after two angular contact hybrid ceramic bearings as the elastic line support, ignoring its rotation nonlinear factors, and taking supporting stiffness of the the bearing as a fixed value.
During machining, in the premise of little influence affecting machining process, the tool overhang should not be too large.
(3) In the premise of not affecting the quality of the machined surface, a appropriate decline of rotation speed allowed can improve the stability of high-speed machining tool system.

Hardening effect as a function of the content of alloying elements [12] The quality of any extruded product is a function of various factors, such as chemical composition, geometrical dimensions, appearance and regularity of the microstructure, variation of mechanical properties over the extruded length and cross section, and surface finishes [4].
There are numerous factors that affect process planning of cold extrusion such as extruded shape and size, tolerance, surface finish, component type, material and quantity to manufacture, etc. [7].
Mechanical properties of tool steel alloy.
The main factors like billet length, billet container, extrusion ratio and extrusion speed will affect metal flow and the resulting properties, structure of the section and its surface finish.
Shapes and Properties

Because of coal winning machine actual working environment is very bad, the objects’ physical and mechanical properties are quite uncertain, coal winning machine output shaft bearing vulnerable to damage, so choose the right bearing is very important.
Introduction The rolling bearing is One of mechanical parts used widely in mechanical equipment.If bearing selection is unreasonable, and it often leads to premature bearing fatigue spalling or a sharp rise in bearing temperature, caused by burning, thereby enabling the bearing locking cage fracture and even rolling element and such as ring broken fault, seriously affecting the reliability of the machine.
Select bearing a variety of factors to consider, judge the main diversity of thinking.
Bearing life correction formula （1） In the formula: load factor; reliability life correction factor: the life of the lubrication correction factor; the life of the lubricating oil filter accuracy correction factor; the life of lubricating oil water content correction factor; material meltinglife modification factor; the life of the material surface hardness correction factcor; the life of the temperature correction factor; the radial clearance of the life correction coefficient; the life correction factor for axial deflection; basic dynamic load N; equivalent dynamic load, N; life index.
Mechanical design and manufacturing,2001,4(10):10-11.

For civil engineering finite element model of complex structure, there are many factors which can affect the calculation accuracy.
Assembly inaccuracy in the process of building, welding process of steel structure, concrete pouring of structure and curing conditions, and many other factors, make the actual geometric, physical and mechanical properties of the structure deviate from the design value.
The main influence factors can be divided into three categories in general: space geometry topology configuration errors, mathematical discretization errors, physical mechanical properties errors.
Physical mechanical properties errors mainly come from the nonlinear response of material.
The other is that the parameters of finite element model are mainly determined by the factors such as geometry and material properties of the structure, and they have specific physical meaning.

The estimation of the physical properties of raw compacts and sintered ceramic samples was done.
To evaluate the influence of parameters on the mechanical properties of molding material a three-point bending test was made using a universal electromechanical system «Instron 3369».
It was noticed that larger values of the density of raw compacts do not provide higher rates of mechanical properties of the samples after sintering.
On this basis, conclusion that the mechanical properties of ceramics are determined by the behavior and strength of adhesion between granules but not the compact density of raw compacts.
Rimmer, The cold isostatic pressing and sintering of alumina powders for use in the machine process: an investigation of some physical factors affecting service performance, UMIST, 1961

Important factors to cast a rod with a convex shape are the speed of the molten metal ejected from a hole-nozzle and the collapse angle between the molten metal stream and the wheel.
Important factors that affected the cross sectional shape of cast-bar were the speed of molten metal ejected from the hole-nozzle and the collapse angle of the molten metal against the wheel.
Important factors that affected the cross sectional shape of cast-bar were the speed of molten metal ejected from the hole-nozzle and the collapse angle of the molten metal against the wheel.
Marcantoni, FROM MOLTEN METAL TO 3.2 mm WIRE FOR MECHANICAL APPLICATIONS, Light Metals 2012 Edited by: Carlos E.
Jabłoński, Effect of Iron Addition to Aluminium on the Structure and Properties of Wires Used for Electrical Purposes, Materials Science Forum, 690(2011), p. 459-462