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Microstructure of 0.2mass%P containing TRIP steel was inhomogeneous and it resulted in deterioration of the mechanical properties.
In general, large amount of retained austenite with high carbon concentration is desired to obtain good stability of retained austenite and good mechanical properties.
The carbon concentration, for example, which is considered to be the most affecting factor, must be keep as high as possible at the end of heat treatment in order to obtain good mechanical stability even at high strains.
To investigate the mechanical properties, tensile tests were conducted at a strain rate of 8.3×10−4 s−1 by using a SHIMADZU AG-IS.
The difference in mechanical properties between the two TRIP steels are related to their different microstructural characteristics.

The surface contact impression(SCI) is the neglected forming defect and seriously affects surface quality and mechanical property of stamping parts.
Therefore, the paper researches the main factors affecting SCI, ascertains the technology parameters hardly leading to SCI [3], confirms the significances of factors and reliabilities affecting SCI via the orthogonal design of experiment and date analysis[4].
Main factors affecting sheet metal thinning Mechanics model of sheet metal intake DR.
For the sake of integrated section dimension and mechanical properties of sheet metal, the coefficient of back pulling force (CF) as a contrast parameter is adopted in calculation.
On account of different affecting degree of four factors for experiment results, table 2 shows that factor A is highlight, next factor C, D and B.

SEM observation revealed that the stoichiometric ratio of the Si/C atom in the sintered body is an important factor to affect the mechanical performance of the silicon carbide.
The detailed influencing factors need to be studied further.
Table 1 shows their typical mechanical properties, density and price.
However, the ballistic property of ceramics does not depend on some single mechanical property but be influenced by sorts of mechanical properties.
Impact factors in detail still need make further experimental study.

The effect of moisture content on the loess physical properties Lin Ma Shanxi Transportation Research Institute, Key Laboratory of Highway Construction & Maintenance Technology in Loess Region, Ministry of Transport,Taiyuan,030006 China 327759595@qq.com Keywords: moisture content; physical properties; intact soil; confining pressure Abstract: Water is one of the most important factors affecting the mechanical properties of soil.
In this paper, the mechanical properties of loess in Shanxi under different water content is studied from the experimental angle.
This property has become the most important factor affecting the quality of construction projects.
Conclusion Moisture content is one of the most important factors affecting the mechanical properties of soil.
In this paper, the mechanical properties of loess in Shanxi under different water content is studied from the experimental angle to reveal the intrinsic mechanism of the changes.

Results showed that the size of the eutectic region and the morphology of the Si phase were the main factors affecting the mechanical properties and fracture morphology of the wheel hub.
By comparing the microstructure and mechanical properties in different parts of A356-T6 aluminum alloy wheel hub that made by low pressure die casting-hot flow forming process, this work is carried out to obtain the influence of the size and morphology of Si particles in eutectic region on mechanical properties.
The segregation of Si particles will directly affect its mechanical properties while deteriorating the structure.
The values of mechanical properties in spoke are much lower than those of the upper rim, indicating that the coarse rod-like Si phase and irregular eutectic region have a very bad influence on the mechanical properties of the A356 aluminum alloy.
Li, Effect of heat treatment on microstructures and mechanical properties of A356 alloy by low pressure casting, Adv.

The results show that the water to binder ratio is the most effective factor influencing all of the mechanical properties, the mechanical properties except the splitting tensile strength are less influenced by the cement content, the elastic modulus and axial compressive strength as well as flexural tensile strength is largely affected by the replacement of cement by fly ash.
The orthogonal test method was adopted with four factors on three levels [8].
To analyze the effects of the four factors on the properties of concrete, the range and variance are firstly computed as shown in Table 6 and Table 7.
Conclusions The basic mechanical properties of concrete mixed with composite coarse-aggregate were studied by orthogonal test method considering the factors of the cement content, the percent of cement replaced by fly ash, the percent of crushed limestone replaced by lightweight aggregate and the water to binder (cement + fly ash) ratio.
Because the replacement of crushed limestone by lightweight aggregate is the third parameters influencing the basic mechanical properties except cubic compressive strength, there is the possibility to optimize the replacement of crushed limestone by lightweight aggregate to ensure the mechanical properties affected by the composite aggregate in a limit range.

Dynamic properties of mechanical joint surfaces are researched, majorly contains the study of basic mechanism and factors affect the dynamic properties of joint surfaces.
After that, many scholars carried out further research in dynamic properties of joint surfaces along with the factors that influence these dynamics.
Dynamic factors are also recognized according to series of experiments.
(2) The most significant factors that affect joint surfaces’ dynamics are normal stress, surface roughness and topography
Confer. on Properties and Mechanical Engineers, 1968 [4] M.

Factors affecting composite properties were investigated including % PE-g-MA loading, and % fiber loading.
The samples were then characterized for mechanical, and morphological properties.
The microbial colonization affected mainly of surface properties r-PE composites while changes were monitored also in the bulk properties of cellulose microfiber.
The majority of these works developed plastics with distinct mechanical properties.
Results and Discussion Mechanical Properties.

In this paper, we study the microstructure of steel how to affect the mechanical property.
Mechanical property is one of the most important properties of steel material.
It is the most important reason affecting mechanical properties that the structure of steel materials includes crystal structure and amorphous body structure as well as microstructure (known as microscopic structure).
Microscopic structure is one of the main factors affecting the mechanical property of steel, we will have a discussion about the relationship between microscopic structure and mechanical with the different mechanical properties of steels which have same ingredients but different microscopic structures, as well as the varying steel mechanical properties when changing the steel’s microscopic structure.
All these three processes can enhance toughness and solidity, and improving mechanical properties

Study on the microstructure and mechanical Properties of Welding Joints of 7A05 aluminum alloy by FSW Donggao Chen1,2,a, Jinhe Liu1,b, Zhihua Ma2,c, Wulin Yang2,d 1Northwestern Polytechnical University, school of materials science and engineering, ShanXi Xi︐an, 710072, China. 2Ningbo Branch of China Academy of Ordance Science,Zhejiang Ningbo, 315103,China.
achendg2580@sina.com, bjinhliu@nwpu.edu.cn, cmzhbky2012@163.com, d1119742501@qq.com Key words:7A05 Al alloy; Friction Stir Welding; microstructure; mechanical Properties Abstract: The7A05 aluminum alloy of the 10mm thickness was welded by the friction stir welding.
The microstructure and mechanical Properties of the welded joint was researched by the optical microscope, etc.
Generally speaking，the ranges of heat input factor are 3 ~ 6 when welding thickness aluminum alloy, (heat input factor = rotating speed / welding speed), the ranges of the rotating speed are 300r/min ~ 1000r/min, the ranges of the welding speed are 50mm/min ~ 400mm/min along the weld direction.
However, when welding speed increased to a certain extent, the grain refinement was not obviously with the welding speed increasing, therefore, the mechanical properties of welding joint was not changed obviously, however, yield strength had not change with the welding speed increasing.