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Being a lightweight, durable and sturdy material, it shows excellent performance and superior properties in most applications.
Also due to these properties, aluminum production practically doubled between the 1960s and 1970s.
The matrix of the microstructure of the material is also decisive for the attainment of the mechanical properties.
The microstructure of the aluminum alloy obtained by, for example, casting must achieve the desired properties via heat treatment [5].
Some properties of aluminum can be obtained by adding some chemical elements, the so-called alloying elements.

When applying the aging process at 500oC at 6min and 60min the k-phase becomes responsible for the mechanical properties of triplex steel [14,15].
There are many factors affecting the occurrence of serration, including strain rate, sample size, grain size, and heat treatment [20].
"Microstructures and Mechanical Properties of High-Strength Fe-Mn-Al-C Light-Weight TRIPLEX Steels." 
"Influence of rolling conditions and aging process on mechanical properties of high manganese steels." 
"Factors influencing the tensile behavior of a Fe–28Mn–9Al–0.8 C steel." 

For this reason, it is important to estimate and predict the mechanical properties decay, in terms of toughness and crack propagation, when steel is in contact with hydrogen.
Introduction When hydrogen is present in the working environment of structures made of carbon and low alloy steels, these materials show mechanical properties degradation.
Aim of the present paper is to develop a FE model able to estimate the fracture toughness of two steels in presence of hydrogen, starting from their mechanical properties in hydrogen free conditions.
Table 1: Mechanical properties of the analysed steels Material σy [MPa] σUTS [MPa] E [MPa] SA-182 F22 468±3 592±2 206500±1500 API 5L X65 511±7 609±6 206200±6050 The second step consists of a diffusion analysis.
Comparing the results with the experimental values obtained by hydrogen charged material, the model seems to appreciate the embrittlement effect on the mechanical properties drop of the two low-alloyed steels.

It was a breakthrough to select the appropriate activator and activation method, because of the difference mechanism of action and effects for different activators of fly ash, the complexity composition of filling material mixed with large number of fly ash, and the early and late physical and mechanical properties [1,2].Four salts are used for activators in this paper, which are mixed with fly ash and water, and a display method was selected to maximum activate the activity of fly ash, increase the early strength of the material, and reduce the cost of the material.
Table 2 The level and factors of the orthogonal Factor The level  Code Name 1 2 3 A Lime 15% 20% 25% B Plaster 10% 15% 20% C Early strength agent 1.0% 2.0% 3.0% D J85 0.5% 1.0% 2.0% Note: The content of each factor relative to the percentage share of quality cement To make a compressive strength range analysis after obtaining test results, and determine the optimize combination of each factor, according to the average value of each index in different level, the compressive strength determined by 8h is A3B1C3D2,by 24h is A3B2C3D2, by 3 d is A3B2C3D3.But it is the optimal level for J85 to take 2 levels.
Table 3 The level and factors of the orthogonal Factor Level Code Name 1 2 3 4 A Activation time 0h 2h 4h 8h B HHJ-1 0% 3% 6% 9% C HHJ-2 0% 0.05% 0.1% 0.15% D HHJ-3 0% 0.1% 0.2% 0.3% E HHJ-4 0% 0.1% 0.2% 0.3% Note: The activation time is the placing time that activator, fly ash and water mixed together; the content of the last four factors relative to the percentage share of quality fly ash Table 4 Programs and results of orthogonal test Test No.
The material strength and initial setting time of 8h were regarded as standard formula by considering the above factors.
Seen by the mechanical properties of the material, the material used as backfill has the following advantages: (1) The material showed a strong plastic material in compression destroyed.

Effect of VC/Cr3C2 additions on microstructure and mechanical properties of WC-16TiC-xTaC-10Co Ultrafine Cemented Carbides Chongcai Zhang1, a, Quan Wang1, b,*, Qunqun Yuan1, c and Long Wang2, d,* 1College of Material Science and Engineering, Xihua University, Sichuan Chengdu 610039 China 2Zhongshan Torch Polytechnic College, Guangdong Zhongshan 528436 China azhangchongcai@sina.com , bwqword@126.com, cxhdxyuanqunqun@163.com , dkingkingv@163.com Keywords: Grain Growth Inhibitor; cemented carbide; property; microstructure Abstract.
The physical properties and the micrographs of samples were detected.
Effect of VC/ Cr3C2 on mechanical properties.
So the main factor that affects coercivity is inhibitor additions with the other production conditions and process unchanged, Hc∝1/dwc, the higher coercivity, the tinier grain size, this suggest that VC/ Cr3C2 inhibite the grain growth, but this coercivity increased with the content of Cr3C2 increasing does not agree with the theory of VC/ Cr3C2 inhibite the grain growth in WC-Co as a large amount of (W, Ti, Ta)C in this cemented carbide[1].
Effect of WC particle size on the microstructure, mechanical properties and fracture behavior of WC-(W, Ti, Ta)C-6wt%Co Cemented carbides.

The effect of UV power on the microstructure was investigated and the mechanical properties of cast samples were examined.
Mechanical properties of RSC castings of semisolid slurry.
The mechanical properties strongly depend on the size, amount, shape and distribution of the primary phase and intermetallic compounds.
Mao, Effect of semi-solid processing on microstructure and mechanical properties of 5052 aluminum alloy, Trans. of Nonferr.
Effect of Y and Ce additions on microstructures and mechanical properties of Mg-Zn-Zr alloys, Mater.

The tests with different properties were analyzed to check the best results and find the most suitable material effect and force difference due to material densities, wall thickness, and other properties.
These properties show large differences in results, such as a 20% strain increase in the Quarter cubic infill.
The general concept of this article is to determine the best possible infill for use while checking the mechanical properties and effects of each infill at different densities.
I made this possible by reducing the factors that could influence the results.
This can be helpful if the properties that each shape shows remain the same, as you can have greater control over the properties.

Based on the consolidated drained shear triaxial tests, the mechanical properties of different proportion of CSG are studied on shear failure mode, stress-strain relationship, shear strength.
The mechanical properties of CSG is between that of earth rockfill materials and concrete[2].
However, the study on mechanical properties of CSG lags practical engineering obviously.
Meanwhile, by contrast, what cement affect the mechanical properties of cemented sand and gravel was analyzed.
The effect of cement, fiber, confining pressure and other factors were considered on the strength of cemented sand and gravel.

It was observed that the increase of zinc oxide concentration aggregate a good antibacterial property in the samples tested without cause significant changes in the mechanical properties of the composites.
Introduction Innumerable problems related to bone structures motivated many researchers to look for alternatives to replace the damaged tissues by artificial materials that guarantee compatible mechanical, chemical and biological properties.
By these means, it is possible to aggregate different properties to common materials, thus supplying the properties required for therapeutic applications of the bone tissues.
The mechanical tests showed that it is possible to add zinc oxide nanoparticles in the composite without causing a negative effect in the mechanical properties associated with the tensile strength of the composite.
Conclusions The mechanical performance tests showed that the addiction of the composite with zinc oxide nanoparticles does not significantly affect its mechanical properties.

The dynamic load of ice, wind and wave were the possibly factors triggering the fatigue damages [1,2].
The fatigue phenomenon was indeed depends on mechanical effect (e.g. crack mechanism) microstructural and environmental factors [5].
It is essential to recognise the fatigue strength of materials in basic condition to gain full understanding of fatigue properties due to its significance in mechanical design.
The mechanical properties and chemical elements are given in Table 1 and 2 respectively.
Boardman, Deere, ASM Handbook, Volume 1: Properties and Selection: Irons, Steels, and High-Performance Alloys, in: ASM International, 1990, pp. 673 - 688