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First principle calculations can be used to study fundamental properties of these phases and, therefore, help to identify the desired ones and their precipitate structures.
For measuring the strength of materials using uniaxial mechanical tests, the Schmid factor for single crystals or the Taylor factor, M, for polycrystals are conveniently used to account for the effect of crystallographic orientation or texture with respect to the applied loading direction.
The 2 nd phase particle size distribution and volume fraction etc. depend on the chemistry and processing factors, and the shape and orientation usually on the crystallographic relationship between the 2 nd phase and the Al matrix.
Whether or not they are sheared by dislocations is very critical for their strengthening effect and for other mechanical properties including ductility and rupture life.
Atomic clusters or SROs have been seen in many other alloys, and play different roles for the microstructure evolution and mechanical properties.

The results indicate that the new highway geotechnical zone can better reflect the variation of rock-soil engineering properties in Shandong province.
The stability, security and economy of the highway structures, such as roadbed, pavement, bridges and tunnels, are closely related to the soil types and its engineering properties.
Different geotechnical types have different engineering properties.
Geotechnical areas were divided according to different engineering properties.
Different rock region reflect obviously different engineering properties.

In addition, Fan et al. [2] indicated that crack propagation and wear factors dominated the failure behaviour under contact loading.
These studies imply that it is important to study the failure pattern which is affected by the contact loading situations.
Polyphenylene sulfide (PPS) is an industrial polymer with excellent mechanical properties [4].
Experimental Procedure Table 1 shows the properties of PPS specimens [7].
Properties of PPS specimens [7].

Effect of Pressure on the Gas Atomizer to Fabricate Stainless Steel Metal Powder Sugeng Supriadi1,a,*, Tsaome Indah Susimah2,b, Muhammad Haekal Sena Akbar2,c, Bambang Suharno2,d, Ario Sunar Baskoro1,e, and Dharmanto1,f 1Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Depok, 16424, Indonesia 2Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok, 16424, Indonesia asugeng@eng.ui.ac.id, btsaomeindahs@gmail.com, chaekal.sena@gmail.com dsuharno@metal.ui.ac.id, eario@eng.ui.ac.id, fdharmanto.mesin@gmail.com *Corresponding author: sugeng@eng.ui.ac.id Keywords: Free Fall Gas Atomizer, Metal Injection Molding, Gas Pressure, Powder Metallurgy, Stainless Steel Abstract.
Referring to the previous study, powder with a smaller size will have better results on the mentioned properties in the final product [6, 7].
(a) (b) (c) well-rounded rounded sub-rounded sub-angular angular very angular Fig. 3 The measurements of the particle comparison are indicated by giving different colored-label for each shape category on the SEM results of: (a) 8 bar pressure, (b) 10 bar pressure, and (c) 12 bar pressure Fig. 4 Effects of gas pressure on powder morphology Based on a study [10], factors affecting the roundness of the particle are mainly due to either collision between the metal powder particle itself or between the metal powder particle with any existing particle during the solidification process.
Samal, Powder metallurgy stainless steels: processing, microstructures, and properties: ASM international, 2007
Sanetrnik, "Rheological properties of gas and water atomized 17-4PH stainless steel MIM feedstocks: Effect of powder shape and size," Powder Technology, vol. 312, pp. 152-158, 2017

Polyethylene glycol 1500 is a hydrophilic plasticizer that is used to improve mechanical properties of films [9].
Studies of rheological properties The rheological properties of the prepared gels were measured using Brookfield DV III Ultra rheometer (Brookfield Engineering Laboratories Inc., Middleboro, MA, USA) operated by Rheocalc software.
Result and discussion Rheological properties The effect of BPO, PO and PEG 1500 amount on the rheology is shown in Fig. 1.
It is suggested that the incorporation of each drug or excipient caused no change in the rheological properties of the ERS systems.
Suess, The influence of different plasticizers and polymers on the mechanical and thermal properties, porosity and drug permeability of free shellac films, Drug Dev.

Effects of Temperature on Crack Propagation of Nanocrystalline Nickel: A Molecular Dynamics Approach Ziqiang Li1, a, Jingui Yu2, b, Qiaoxin Zhang2, c 1School of Science, Hubei University of Technology, Wuhan 430068, China; 2School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China aliziqiangcos@126.com, byujingui@126.com, czhangqx@whut.edu.cn Keywords: Nanocrystalline nickel, Crack propagation, Dislocation, Molecular dynamics.
Introduction Diversity in mechanical properties of materials derived from different grain size.
Table 1 Temperature and loading velocity factors for three models Models temperature(K) loading velocity (Å/fs) І 10 0.1 II 300 0.1 III 500 0.1 Results and discussions (a) 30 ps (b) 32 ps (c) 36 ps (d) 38 ps Fig. 1 Nickel single crystal dislocation formation and movement at temperature of 10 K.
This is mainly because the dislocation is affected by temperature, and the temperature prompted intense thermal motion of atoms.

Introduction Seaport is a major and logistics infrastructure fortransport export trade.as China's sustained and rapid economic development, harbor projectsis presenting to large scale, complicated construction technology, deepwater and offshore features. steel structure with its excellent physical, mechanical, is favored in the environmentof large waves, complex geological conditions, urgent need of specialized portsand deepwater berths, which other materials cannot match these advantages.
But steel in the marine environment, such as not to take protective measures ,is vulnerable to be attacked by electrochemical corrosion and other damage,which makes steel thickness decrease, physical performance degradation and local stress concentration and directly affect use function andlife of engineering structures, even accidents[1].
Actualamount of oxygen supply is closely related to environmental factors such as seawater velocity, salinity,temperature and sea creatures.The corrosion rate ofsteel structure varieswith the region, especially the splash zone with maximum corrosion rate, because of the range of alternating wet and frequent temperature fluctuations, coupled with seawater bubbles and floating debris impact damage to the surface and a protective layer, whichcreaterich supply of oxygen in the form of film near the steel surface, and can easily cause significant corrosion.In order to resist the corrosion, it’s feasible to startfrom the mechanism of electrochemical corrosion.Firstly it’s effective to forma surface barrier to reduce the oxygen concentration in the surface of steel surfaces, such as corrosion-resistant steel, protective coatings or surface coating,on the other hand measures can be taken to change steel corrosion characteristics of half-cell reaction and keep the steel piles from the electrochemical
Impressed current cathodic protection systems typically includes an auxiliary anode, reference electrode, a DC power supply, control systems and cable,suitable for steel structure with different orhigher change ofresistivity .it’s of more economical when large projects, relatively concentrated component distribution.Meanwhile,itspost-maintenance requirements are relatively high. 2.5Coating Layer Technology[5] Coating layer technology is a surface treatmentmethod combined with corrosion inhibitor and oxygen sealingtechnology withlow requirements,which can be used in wet or underwater.It can provide good protective layer thickness, mechanical properties and anti-corrosion performance according to the demand,and can be used as an effective protective measures for new steelstructure insplash zone , as well as an important choice for repairmen of old steelstructure.

Experimental study on surface quality in milling carbon fiber reinforced plastics Judong Liu1,a, Yousheng Li2, b, Guohong Yan2,c and Likun Huang2,d, Xiaofan Yang1，e, Dongmin Yu1,f 1School of Mechanical and Energy Engineering, Jimei University, Xiamen 361021, China. 2Xiamen Golden Egret Special Alloy Co., Ltd, Xiamen 361021, China.
Introduction CFRP have been widely used in the areas of aerospace, transportation and health care, owing to it having excellent properties such as high strength, light weight, good wear-resistance, strong fatigue resistance, excellent corrosion resistance, etc [1-2].
But CFRP is two-phase or multiphase material which consists of soft viscous matrix and hardness fiber with mechanical anisotropy, so the disadvantages such as delimitation, dilacerations, burrs, wire drawing and bursting crack are frequently found in cutting process, and cutting tool also wears severely [3-4].Therefore the studies on CFRP cutting have been paid widely attention both at home and abroad.
Therefore, the sharpness of tool is one of the key influence factors in milling CFRP.
The sharpness of tool is affected by the tool geometry angles, installation, actual cutting process and tool wear, etc.

Therefore, powder processing techniques have a vast potential to effectively reduce waste of material, secondary machining and finishing operations and to improve mechanical properties.
Microwave sintering provides fast heating rates, reduced sintering times, enhanced diffusion processes, reduced energy expenditure and improved mechanical properties [6].
All these factors are critical to the application of Sn-Ag-Cu alloys in soldering processes.
The effects of size and morphology of the intermetallic compounds in the mechanical properties is still a matter of debate.
Nonetheless, when their size is large and when in needle-like morphology, normally a degradation of the mechanical properties follows.

With the development of modern industry of aviation and aerospace, the demand for the strength and over-all properties of high strength alloy is much higher [1].
One of the main problems in thick plate products of high strength alloy is the formation of microporosity, which may cause the decrease of mechanical property (especially fatigue property).
Casting defect such as porosity is usually present in the as-cast microstructure and can lead to the deterioration of mechanical properties because the difference of temperature gradient and cooling rate in the ingot is large.
Many studies have shown the detrimental effect of porosity on fatigue properties for materials used in the as-cast or heat-treated form [2-4].
Lee has simulated the volume fraction, amount and size of porosity for different content of Mg in Al-Mg alloy DC ingot, also the results has been compared with experimental results [7]; Dobra has studied the formation and effect factors of micro pores for 5083 alloy DC ingot, who pointed out that the formation of pores was because of the nucleation of hydrogen bubble, also it was affected by the filling condition in the mold [8]; Nagaumi gave a new method for the prediction of porosity in Al-Mg alloy slab ingot, hydrogen supersaturated mass in the inter-dendritic liquid and the pressure drop were taken into account in his prediction model, the calculated results correspond well with the experimental results using this method [9].