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The general objective of the present work is to study the brittle fracture of the coarsegrain heat-affected zone (CGHAZ) of a C-Mn steel.
In order to validate this model, fracture mechanical test specimens (3-point bend) have been tested at different low temperatures; temperature dependence of fracture toughness was obtained.
The arresting stress intensity factors considered were the following: m/m IaK is the crack arrest ability at the boundaries of the bainitic packets, c/m IaK is the crack arrest ability at the carbide/bainite boundary, p/m IaK is the crack arrest ability at the pearlite/bainite boundary, α I is the fracture probability of a particle (carbide or pearlite colony) of the mean size.
The model takes into account the effect of the temperature over the controlling factor of the toughness.
References [1] Kenji Ohya, Jongseop Kim, Ken'Ichi Yokohama y Michiko Nagumo, "Microstructures relevant to brittle fracture initiation at the Heat-Affected-Zone of Weldment of a Low Carbon Steel", Acta Metall., 27A, pp. 2574-2582 (1996) [2] Akelsen, O.M., Grong, O. y Solberg, J.K., "Structure property relationships in intercritical heat affected zone of lowcarbon microalloyed steels", Materials Science and Technology, vol.3, pp. 649-655(1987) [3] Martin-Meizoso, A., Ocaña-Arizcorreta, I., Gil-Sevillano, J. y Fuentes-Pérez, M., "Modelling cleavage fracture of bainite steels", Acta Metall.

There are several factors including the crystallite size, the crystal orientation, and the alloy composition, that can affect the mechanical properties of these deposited films [5].
These properties also can be affected by the finishing the coating with heat treatment process.
Mechanical properties of EN coatings such as hardness and wear resistance are enhanced by heat treatment.
Another factor affecting the behavior of hardness of the nanocrystalline CoNiFe in this study may be attributed to the grain size and porosity effect.
Akanbi, Effect of Heat Treatment on Mechanical Properties and Microstructure of NST 37-2 Steel, Journal of Minerals and Materials Characterization and Engineering. 10 (3), March 2011

Microstructure is very important to the properties of materials.
If these additive powder agglomerations can not be dispersed well, that will affect the densification and the mechanical properties of sintered body.
If these additive powder agglomerations can not be dispersed well, that will affect the density and the mechanical properties of sintered body.
Akira, Microstructure, Mechanical and Thermal Properties of Plasma-Sprayed W/SiC Metal Matrix Composite Coating, Transactions of JWRI. 35 (2006) 35-41
Chen, Effective Factors of Spray Prilling of SiC Powder, China Powder Technology. 5 (2007) 5-6

Joint configuration is mostly affected by the material parameters and process type.
The various properties of the sheet metal are assumed to be function of temperature.
Thermal and Mechanical properties of mild steel [7, 8] Temperature [0K] Specific Heat [J/Kg-K] Thermal Conductivity [W/m-K] Poission’s ratio Young’s Modulus [GPa] Thermal Expansion coefficient [10-6 m/0K] 0 450 51.9 0.2786 200 10 373 499.2 51.1 0.3095 200 11 573 565.5 46.1 0.331 200 12 723 630.5 41.05 0.338 150 13 823 705.5 37.5 0.3575 110 14 873 773.3 35.6 0.3738 88 14 993 2080.4 30.64 0.3738 20 14 1073 931 26 0.4238 20 15 1723 437.93 29.45 0.4738 2 - 1783 400 29.7 - 0.2 - 1853 735.25 29.7 - 0.00002 - 5273 400 42.2 0.499 0.00002 15.5 Modelling assumptions.
Welding current is one of the important parameter that affects the weld pool.
Welding current and welding speed have considerable affect on the weld responses.

Experimental Procedures The material used in the experiments was AA5052 with its chemical composition and mechanical properties lists in Table 1 and Table 2.
Table 1 Chemical composition of 5052 Aluminum alloy (Wt -%) Al Mg Cr Si Fe Cu Mn Zn Other 95.70 2.2-2.8 0.15-0.35 ≤0.25 ≤0.40 ≤0.10 ≤0.10 ≤0.10 ≤0.15 Table 2 Mechanical properties of 5052 Aluminum alloy Sample Temper [℃] Yield Strength [MPa] Tensile strength [MPa] Elongation at fracture [%] 25 78.9 201.7 15 The welding parameters are shown in Table 3.
Fig.5 Effect of welding time on the peak load of 2.0/2.0/2.0 mm three-sheet 5052 aluminum alloy Fig.6 Effect of button size on the peak load of 2.0/2.0/2.0 mm three-sheet 5052 aluminum alloy Weld fusion (weld nugget) size is the most important factor affecting spot weld mechanical strength [8].
J.Effects of resistance spot welding parameters on microstructures and mechanical properties of dissimilar material joints of galvanised high strength steel and aluminum alloy.
M.Factors affecting the quality of resistance spot welds.

Their mechanical and crimp properties were got from Instron 5566.
For the same kind of polymer, the higher the apparent viscosity, the worse the flow properties.
The effect of weight ratio on the structure and crimp properties.
The effect of weight ratio on the crimp properties of PET/PTT bicomponent fiber.
On the premise of the spinnability, following conclusions could be drawn: (1)The viscosity difference between the PET component and PTT component was key factor influencing structure and crimp properties of PET/PTT bicomponent filament, followed by the composition content. (2) The crystallization of PET component with high melting temperature occurred preferentially, and the PET component bore most of the spinning tension due to its excellent mechanical properties.

Analysis on influencing factors of cement stabilized macadam base of compressive strength in Shenyang area Yan Xu1, a, Chunzhen Bai1,b , Yifang Zhang1,c , Xiao Liu1,dandDi Li1,e 1 Shenyang Jianzhu University, Shenyang, Liaoning province, 110168, China axy_zsl@163.com, b1039471842@qq.com, c786898732@qq.com, d10732420@qq.com, e1061825140@qq.com Keywords: grain size distribution, forming method, curing age, strength influencing factors Abstract.
However, there are many and complex factors which can affect the strength of cement stabilized macadam roadbase.
Raw material properties Table 1 Raw material sampling Number Mixing station Construction route Particle size composition(cm) Stone origin 1 Shenbeicui gongbao Pingwang route,Nongwang engineering 1~3,1~2,0.5~1;attle Tieling 2 Shenyan Shenyan route 1~3,1~2,0.5~1;attle Fushun 3 Xinmin Jiangzhang route 1~3,0.5~1;attle Tieling 4 Hunnansifang Xinlibao route mixture, attle Liaoyang 5 Hunnanlixiang Shenli route, Yonghong route 6 Liaozhong Gaonen route Analysis of the formation mechanism of the strength of cement stabilized gravel Table 1 shows.
Therefore, considering the shrinkage cracks and other factors, suggestions appropriate to reduce the dosage of cement in engineering.
With increasing age, the strength of cement stabilized gravel affected by the degree of compaction shows a decreasing trend.

Mathematical Model of Bubble Dissolution Process in Polymer Melt Zailiang Chen 1, a, Tianqi Huang 2, b 1,2College of Mechanical & Electrical Engineering, Soochow University, Suzhou 215021, China achenzailiang@suda.edu.cn, bhtq128@yahoo.com.cn Keywords: Non-Newtonian fluid, Inert gas, Bubble Dissolution, Modeling and Solution Abstract.
The model was solved by finite difference method, and the results show that the initial bubble radius and the outside pressure is the main factor affecting the bubble dissolution.
Rheological constitutive equation, also known equation of state, which describe the mechanical behavior of materials in a mathematical model of the ideal state, most polymer melts have viscoelastic properties, Owing to calculation is simple, DeWitt constitutive equation was selected in this paper

Many factors influence the humidity distribution of surrounding rock in roadway of swelling rock.
It is neither possible nor necessary to set all the factors in the simulation test alike .Selecting the appropriate conditions of similarity, developing the reaction of expansive rock physical and mechanical properties of similar material, is the key to correct simulation prototype.
But due to the numerous factors that affect the expansive characteristics of swelling rocks and the complexity of the geological condition, until now the material similar of swelling rock is still not suitable.
Since compared with other ratios, the properties of the similar material corresponding to ratio A is the closest to physical and mechanical property indexes required by material model test; (4)In future studies of the expansive rock similar material mixture ratio, in order to seek more ideal expansion rock similar material, the more in-depth investigation of mineral properties and shrinkage can be conducted.
Study on engineering properties of expansive rock [ J ] .

a a.nagasekhar@uq.edu.au , b c.caceres@minmet.uq.edu.au * Corresponding author: Tel: +61 7 3365 4377, fax: +61 7 3365 3888 Keywords: Magnesium-Aluminium alloys, Mechanical properties, Microstructure, High pressure die casting, Skin effect.
As a result, the casting processing and geometric parameters may have an overriding influence in the final mechanical properties [1, 2, 8].
Such a study seems warranted as HPDC is the most important route for the production of magnesium components, and a detailed understanding of the microstructure-mechanical property relationship may result in optimised alloy design.
There may be other factors involved, though, such as a reduction in the grain size, which would increase the overall strength.
Such factors must be quantified [3] in order to develop a suitable model to predict the flow strength and ductility from first principles.