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In sheet metal forming, the friction between tooling and workpiece is an important factor which affects not only the quality of products but also the service life of tooling.
Factors influencing friction have been investigated in sheet metal forming.
Andrzej[5] investigated the factors influencing friction in sheet metal forming, such as sample orientation, lubricant, velocity of sample displacement, plastic strain and contact pressure.
Azushima[9] extended the research with the analysis of the influence of the die surface properties on the friction coefficient.
The material mechanical properties are shown in table 1.The specimens for the friction tests were prepared as a strip of 500×13mm.

The chemical composition and mechanical properties of the plate are shown in Table 1.
Table 1 Chemical composition and mechanical properties of a steel plate, SM490A Chemical composition [mass%] Mechanical Properties C Si Mn P S σYS [MPa] σTS [MPa] 0.16 0.03 0.34 0.014 0.002 418 565 Fig.2 Corrosion fatigue test apparatus (Unit: mm) (b) (a) Fig.1 Configuration of fatigue test specimens (a) Specimen with weld beads (b) Specimen without weld beads ×: Locations of residual stress measurement Fig.3 Schematic illustration of corrosion pit Corrosion fatigue tests.
Fig.4　Changes in residual stress during fatigue tests Corrosion fatigue properties.
It is therefore insufficient to explain that corrosion fatigue properties are affected by the residual stress as the mean stress simply.
In the low stress range region, corrosion fatigue properties of specimens with weld beads cannot be estimated using the modified Goodman relation; the residual stress did not affect corrosion fatigue mechanically, but also affect it corrosively.

This may affect the mechanical property, corrosion sensitivity and other service properties.
If these are not controlled, weldment may develop unweldly structural and mechanical properties that may lead to failure.
This leads to poor mechanical property in the welds [11].
All other factors being equal, as carbon content increases so does the difficulty in weldability.
A.: Effect of Preheat and Postweld Thermal Treatment on the Mechanical Properties of Ni/Cr Steel Weldment.

Introduction The formation of ink film with desired print density on paper substrates is consequentially dependent on the ink absorption and ink receptivity, which is determined by paper surface structure and printing condition.[1, 2] There are many factors affecting the structure and surface properties of the coated paper in the papermaking process, which include coating recipes, coating conditions and calendering, etc.
In fact, coating conditions are the important factors which affect structure and properties of coating layer.
Results and Discussion Surface properties of Coated Paper.
The Results showed that drying methods had the influence on the paper properties.
The findings indicated that coating methods affected the surface properties.

The forming process of the forming metal sheet parts and quality of product are generally affected by the material properties, rough shape, friction and lubrication conditions, the shape of the mold, stamping direction and speed as well as the size of BHF and many other factors.
Generating blank holder and a lower die Orthogonal Experiment Design The orthogonal experiment study on the optimal parameters of drawing cylindrical pieces and the main affecting factors of defects in the process of drawing.
The level of the factors is shown in Table 1.
So where the biggest range is indicate the biggest factor affect the test targets.
Therefore, the sequence of factors affecting the minimum thickness of the workpiece is BHF> punching speed> , that is the greatest impact comes from the BHF, followed by punching speed, the impact of the punch-die clearance is minimum.

Another factor affecting the end product is the polymer processing method and process manufacturing conditions.
The extent to which process parameters can affect the resulting mechanical properties is the subject of many investigations.
Mechanical properties were evaluated by the Oliver & Pharr method.
Mechanical properties were evaluated by the Oliver & Pharr method.
Mechanical properties were evaluated by the Oliver & Pharr method.

However, the poor mechanical property has limited its application.
Some earlier studies showed that PSA with higher ratio of 4,4'-DDS segments performed better mechanical properties[3,4], and the thermal stability of the copolymers had little dependence on the copolymer composition[5].
As a result, increasing the ratios of 4,4'-DDS contents in the copolymer is a practical approach to improve the mechanical properties of PSA.
They were typical pseudoplastic fluid, temperature and shear rate affect a lot in their flowing property.
Zhang, Copolymer structure and properties of aromatic polysulfonamides, J.

The factors to influence the burr removal and the micro-channel surface quality are analyzed in order to take measures to improve the surface quality.
The factors to influence the burr removal and the micro-channel surface quality are analyzed in order to take measures to improve the surface quality and the burr removal rate.
The W10 B4C micro abrasives are used in micro slurry jet polishing experiments, the abrasive property is shown in Table 2.
Friction factors in smooth trapezoidal silicon microchannels with difrerent aspect ratios, International Joumal of Heat Mass Transfer. 2003. 46: 25 l 9-2525
Mechanical Engineering. 3 (1984) 60-69

Elastic Properties of Rhombus Dodecahedron Open-Cell Cellular Materials Hong Zhu1, a, Ligang Zhang2, b, Xiangdong Qi2, c 1School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China 2National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, China azhuhong9@126.com, bzlg@ysu.edu.cn, cxdqi@ysu.edu.cn Keywords: Cellular materials; Rhombus dodecahedron; Elastic properties; Finite element method Abstract.
Geometric Model Rheological state and surface tension of melt body are two important factors of cellular materials formation, surface tension draws the solid to cell-corner.
(4) Summary For the solid which surface tension draws to cell-corner has influence on relative density increment, circle-strut radius and transitional-junction curvature radius are all the primary factors.
Ashby: Cellular Solids: Structure and Properties (Tsinghua University Press, Beijing 2003)
Lu: Journal of Mechanical Strength.

And the measurement of mechanical properties typically the bonding strength is discussed.
The process parameters for plasma sprayed HA / ZrO2 bioceramic coating are optimized aiming to improve the mechanical properties.
Based on uniform design theory, spraying distance, spraying current, primary gas flow and auxiliary gas flow were chosen as design factors.
Mechanical properties such as Young’s modulus, bonding strength, and fracture toughness, have determining influence on the application of bioceramic coating.
Among the mechanical properties, bonding strength of a bioactive coating to a substrate affects successful implantation and long-term stability of the implant coated with the bioactive material significantly.