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Online since: November 2012
Authors: Jun Gao, Shu Xia Lin, Wen Ke Bao, Jia Bin Wang
Intergranular Corrosion of Austenitic Stainless Steel Shuxia Lin1, a, Wenke Bao1, b and Jun Gao1, c, Jiabin Wang2, d 1School of Mechanical Electrical and Information Engineering, Shandong University at Weihai, Weihai 264209, PR China 2 Shandong Shuanglun Group, Weihai 264203, PR China a linshuxia@sdu.edu.cn, bbwk2011@163.com, c shdgj@sdu.edu.cn, bbwk2014@126.com Keywords: Austenitic stainless steel, Intergranular corrosion, Influencing factors, Prevention measures, Sensitivity evaluation Abstract.
The principles and the influencing factors of intergranular corrosion are analyzed in detail.
Factors influencing intergranular corrosion Chemical composition.
[3] R Abdel-Karim , I Elmahallawi and K El-Menshawy: Microstructure and corrosion properties of nitrogen stainless steel 316L produced by hipping [J].
Mechanical & Electrical Engeneering Technology, 2004 33(1) (In Chinese)
Online since: December 2019
Authors: Aleksey N. Beskopylny, Elena Kadomtseva, Vadim Poltavskii, Mikhail Lukianenko
It is shown that taking into account the bimodularity of the material significantly affects the maximum tensile and compressive stresses.
Multi-modularity of concrete depends on many factors: aggregate, age, temperature, etc.
The strength of the elements of building structures is determined by the mechanical characteristics of concrete, including the difference in the elastic modulus in tension from the elastic modulus in compression.
Voyiadjis, Alexander Zolochevsky, Thermodynamic modeling of creep damage in materials with different properties in tension and compression, International Journal of Solids and Structures. 37(issue 24) (2000) 3281-3303
Andreev, Layered structure mechanical properties assessment by dynamic tests, MATEC Web of Conferences. 117 (2017) 00018 [12] A.
Online since: December 2011
Authors: Jian Zhong Zhou, Yin Bo Zhu, Zhao Mei Xu
Introduction As ceramic materials have many excellent properties[1-3], such as high insulated property, excellent heat-resistant, high wear-resistance and good erode-resistant property, they are widely applied in electronic industry and mechanical industry.
During laser milling, the machine tools do not need to touch work pieces directly and the work pieces can keep off mechanical force action and can be away form being worn out.
The rule of factors influencing removing rate and surface quality in laser milling was discussed by changing different processing parameters.
The experiment parameters of laser milling The factors affecting the laser milling included laser power, scanning speed and defocusing amount etc.
The positive and negative defocusing amount affects had great influence on the single pulsed pit, so the spot overlap could influent the single path milling width obviously.
Online since: April 2014
Authors: Ai Ping Tao, Jing Cai Chang, Ming Feng Gao, Chun Yan Xu, Chun Yuan Ma
The difference of spreading characteristics was accordance to the physical woven properties of fabrics.
Generally, there are several important factors affecting the collection efficiency for dry ESPs, such as particle re-entrainment and back-corona discharge, etc. [4, 5].
These would offer various superiorities such as good corrosion resistance, sufficient mechanical strength, low cost, as well as suitable particulate collection properties, and all these characteristics would be extremely important in wet electrostatic precipitator applications for PM2.5 regulation requirements.
In other words, the effect of WAR on the average number collection efficiency was not more sensible than other factors such as gas treatment time or applied voltage.
The effect of WAR on the average number collection efficiency was not more sensible than other factors such as gas treatment time or applied voltage.
Online since: October 2014
Authors: Ali Mir Sadat, Rao Ch. Srinivasa
In the present paper the distortion in fillet welds and the affect of the distortion control techniques on the welded joint are studied.
Being a fusion welding process, the heat input during welding affects the base material both physically and metallurgically.
Thus the mechanical and physical properties of the metal as well as the type of joint would affect the degree of distortion.
Along with the factors stated there are certain welding parameters which also affect the distortion.
From the graph the comparison & affect of different distortion control techniques for the increasing power input can be made.
Online since: January 2009
Authors: Sunita Chauhan, Swandito Swandito, Gerald Gim Lee Seet
Several factors affect the safe operation of a bio-mechatronic system such as design limitations of the robots to do complex surgical manoeuvres, malfunction of the system's components, unpredictability of the working envelope to name a few.
Mechanical feasibility tests and in-vitro experimental trials supported the results with a positioning accuracy within 0.5mm.
We used stability based on Lyapunov theory since it is effective to reflect the physical properties of the system [6].
In order to mathematically describe the dynamic properties of FUSBOTBS , classical method from analyses of mechanics and Lagrange equation of motion is used.
Orientation axis Conclusions Reliable system control can improve the safe performance of bio-mechatronic systems besides other factors such as design limitations of the robots to do complex surgical manoeuvres, malfunction of the system's components, unpredictability of the working envelope.
Online since: June 2014
Authors: Yi Ping Li
Study on Impact Properties of New Hydro-pneumatic Buffer for a Metro Vehicle YiPing Li 1,a 1School of Chemical and Environmental Engineering Shanghai Institute of Technology, Shanghai 201418, China amliyiping@163.com Key Words: railway vehicle; hydro-pneumatic; dynamics model; characteristic curve; dynamic simulation Abstract.
The two buffer using damping rod and throttle damping ring structure, if the damping rod and damping ring buffer is not good for neutral, can lead to buffer cannot reach the expected effect, and even failure [5].The damping hole and the damping ring are the main structure parameters of new hydro-pneumatic buffer, also is the main factor that affects the hydro-pneumatic buffer characteristics curve.
Figure .1 Hydro-pneumatic Buffer Structure Diagram and Calculation Model 1. hit head 2.piston rod 3. gas-liquid isolate piston 4.damping hole 5.damping valve 6.cylinder7.oil cavity a 8. check valve 9. oil cavity a 10.gas chamber Dynamic model of hydro-pneumatic buffer The internal structure of hydro-pneumatic buffer is more complex, many factors affect the dynamics characteristics.
Of course, the ideal hydro-pneumatic buffer curve should be as shown in figure 1, but that in practice due to the impact of changes in oil viscosity, oil formation time and other factors is difficult to achieve.
Dynamic test and simulation to the new model of Hydraulic-Gap Buffer[J].Chinese journal of mechanical engineering, 2006, 42(1):212-216
Online since: December 2014
Authors: Shuai Hua, Yun An Li, Yue Wei Wang, Qin Gang Wang, Wei Wang, Feng Hu, Li Zhen Hu, Yin Lei
Fig.1 The mining stope structure Theoretical calculations of safety thickness of stope roof There are many factors that affect the stability of the orebody roof.
Internal factors include roof thickness and completeness, excavation span and morphology, rock strength, fracture status.
Meanwhile, external factors include the size of the load, the frequency of the load, temperature and humidity, etc.
Based on the theory of beam and slab and consider the weight of the roof stress, the change of lateral pressure along the vertical direction, structure surface properties, the structural plane and the extruding structure surface tensile, shear strength under the control of mining safety thickness of roof are analyzed.
Fig.3 Vertical displacement contour (Profile) Fig.4 Vertical displacement contour (Surface) Fig.5 The ground subsidence contour Fig.6 The plastic zone map Conclusion The main factors are incorporated into the improved formula, such as the weight of the roof stress, the change of lateral pressure along the vertical direction and structure surface properties, the calculation of safety thickness range of roof is more reasonable.
Online since: October 2007
Authors: M. Alizadeh, Ali Shokuhfar, H. Khorsand
The mechanical properties of sintered timing wheel were investigated as a function of sintered density.
One characteristic feature of powder-manufactured (P/M) components is the porosity, governing the mechanical properties of the component.
The influence of porosity distribution on the mechanical properties is investigated.
Nonlinear analyses add an extra factor, the number of load increments, which affect both accuracy and expense.
Tensile properties of Fe-Mo-Ni steels[1].
Online since: June 2014
Authors: Peter Jessner, Petar Ratchev
Recrystallization control over the whole process route is strictly needed in order to achieve the required texture and properties.
Two of the most important properties of the automotive 6xxx alloys, formability and roping behavior, are both strongly dependent on texture.
Different particle types have different impact on the recrystallization process and resulting texture and properties.
In it, the surface fractions Fs (we consider them representative to the volume fractions Fv), their effective diameter D (approximating the particles with a round shape) and the dispersion factors, Fs/r, are presented for both cases, WQ and SC.
In fact, a combined dispersion (from both Mn-dispersoids and Mg-Si particles) might be introduced for SC samples, but this is extremely difficult, because many factors should be taken into account, as the heterogeneous nucleation, the particles shape difference etc.
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