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In the case of cracked materials, the crack closure behavior affects the crack growth rate.
The Mechanical properties of the material were 283 MPa of yield stress, 449 MPa of ultimate tensile strength and 60% of reduction of area.
Fig. 4 shows the crack growth rate da/dN as a function of the maximum of the stress intensity factor Kmax.
The variation tendency of the local strains in the vicinity of the crack was affected by whether acceleration or deceleration occurred due to the crack opening and closing behavior.

Facile Synthesis of TiO2 Hollow Spheres with Enhanced Photocatalytic Activity Yu-zhen Lv1, a, Wei Wang1, Sheng-nan Zhang1, You Zhou2 and Cheng-rong Li2,b 1 School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China 2 State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, Beijing Key Laboratory of High Voltage & EMC, North China Electric Power University, Beijing 102206, China ayzlv@ncepu.edu.cn; blcr@ncepu.edu.cn Keywords: TiO2 hollow spheres, hydrothermal method, self-assembly nanorods, photocatalytic activity, Abstract.
In addition, the presence of self-assembled nanorods is also a positive factor affecting the photocatalytic activity.
Li, Photoelectrochemical study on charge transfer properties of TiO2-B nanowires with an application as humidity sensors, J.

Simulations on Heat Exchangers in Thermoelectric Generators for Automotive Application Tan Nguyen Tien1,2,a, Hieu Minh Dong1,b, Dien Vu Minh3,c, Quang Khong Vu1,d*, Nguyen Huu Phu4,e and Vinh Nguyen Duy5,f* 1Department of Vehicle and Energy Conversion Engineering, School of mechanical engineering, Hanoi University of Science and Technology, Vietnam 2Department of Student Affairs, Hanoi University of Industry, Vietnam 3Center for Automotive Technology and Driving Training, Hanoi University of Industry, Vietnam 4Faculty of Automotive Technology, Hanoi Vocational College of High Technology 5Faculty of Vehicle and Energy Engineering, Phenikaa University, Vietnam atannt_dtn@haui.edu.vn, bHieu.dm185790@sis.hust.edu.vn, cdienvuauto@gmail.com, dQuang.khongvu@hust.edu.vn, ephunh@hht.edu.vn, fVinh.nguyenduy@phenikaa-uni.edu.vn Keywords: Thermal electric generator, engine efficiency, counter-current, crossflow, heat transfer Abstract.
Some assumptions are used for the simulation process: fluid having consistent thermal characteristics that is incompressible and viscous; no external work; negligible potential energy and kinetic energy; no phase changes; uniform fluid properties.
(2) where U is the surface area across which heat transfer occurs, F is the correction factor accounting for the crossflow effect, and ΔTLM is the logarithmic mean temperature difference between the two fluids.
If increasing the number of compartments is, the angle of each compartment will be minimal, affecting the movement of exhaust gas.

In a word, Mn and Cr segregation was the key cause of the carbides and the cracks, besides, internal stress of the forging during cooling was another reletive factor.
Closed-Form Solutions for Stress Intensity Factor and Elastic Crack Opening Displacement for Circumferential Through-Wall Cracks in the Interface between an Elbow and a Straight Pipe under Internal Pressure[J].
Effect of Cr Content on Microstructure and Mechanical Properties of Low Carbon Steel Welds[J].
Effects of Mo, Cr and Nb on microstructure and mechanical properties of heat affected zone for Nb-bearing X80 pipeline steels[J].

(5) where σq is the yield strength signifying the comprehensive property of aluminum alloy thick plate.
This is because the elastic modulus will change greatly in the tensile test if the test is immediately performed after quenching, which can seriously affect the measurement accuracy.
Thus, the tensile test is performed 72 hours late after quenching when the material property is stable.
(2) The non-uniformity of elastic modulus and shear modulus are the main factors that cause a W-shape distribution of residual stress when the stretching ratio exceeds a certain value
Journal of Mechanical Engineering, 47 (2011) 57-62

These techniques revealed vacancy properties for most metals [9, 10]. 3.
Important properties in all these applications are the ability to withstand high temperature and aggressive oxidizing or corrosive environments, as well as other properties such as low weight or inertia.
Intermetallics with B2 structure form a large group of intermetallic compounds with a broad variation of chemical, physical and mechanical properties.
-TiAl: This intermetallic has attracted attention as a structural material for high-temperature applications, because of its mechanical and corrosion properties and its fairly low density.
The ternary NiFeAl alloys were found to have better mechanical properties, with the Ni40Fe10Al50 composition revealing a maximum value of the creep resistance [19].

However, PC may absorb humidity from the air, affecting its efficiency and printing stability.
This includes biocompatibility, mechanical properties, and sterilization requirements.
Static and dynamic mechanical properties of 3D printed ABS as a function of raster angle.
Mechanical properties optimization of poly-ether-ether-ketone via fused deposition modeling.
Morphologies and mechanical properties of polylactide/thermoplastic polyurethane elastomer blends.

Application of Wavelet-based Fractal Dimension Threshold Denoising Method to Load Time History of Engineering Vehicle Yingshuang Zhang1, a, Guoqiang Wang1,b , Jixin Wang1,c and Lijuan Yang1,d 1 College of Mechanical Science and Engineering, Jilin University, Nanling Campus, Changchun, China ayingshuangz@jlu.edu.cn, bwgq@jlu.edu.cn, cCorresponding author: jxwang@jlu.edu.cn, d948756904@qq.com Keywords: Engineering vehicle, Load time history, Fractal dimension, Wavelet, Denoise.
It is unavoidable that the measured signals could be polluted by the interference from transmission, channel noise and external environment factors.
Since the wavelet transform is a time/frequency analytical approach, which has multiresolution analysis property, it could identify the abrupt change features and noise efficiently.
The threshold estimation was affected by the length of signal [4].
In order to overcome the problems, Pan, Zhang [5] provided an intuitive selecting method of threshold, which was impacted by anthropogenic factors.

Mahmoudiniya, a.o., Microstructure and mechanical properties of friction stir welded ferrite-martensite DP700steel, Mater.
McNelley, a.o., Microstructures and Properties of Copper Alloys after Friction Stir Welding/Processing.
Shirazi, Microstructurals and mechanical properties of FSWed cooper plates under usage of shielding gas for different welding parameters, Mater.
Sarrafi, a.o., Evaluation of Microstructure and Mechanical Properties of Aluminium to Copper Friction Stir Butt Welds.
Ebert, Magnesium: properties-applications-potential, Mater.

Machinery and Electronics Engineering, Shantou University, Shantou 515063, China, 3.College of Mechanical and Electrical Engineering, Guangdong University of Technology, Guangzhou 510006,China; aHechanglin2318@126.com, bgong.zhang@giat.ac.cn Key word: laser cladding; Ni-based titanium carbide; Process Parameters Abstract: This paper gets a further study to cladding of Ni-based Titanium Carbide in the surface of die steel of 718, This paper introduces the effect of laser process parameters on the titanium carbide and nickel solid solution and cemented carbide in cladding layer; on that basis, this paper studied the effect of the different of powder paving thickness, laser power and scanning velocity and other parameters on microstructure and properties of cladding layer.
It can be combined the metal materials's high strength, toughness and good processing property with the ceramic material's excellent wear and corrosion resistance, and chemical stability, it could greatly improve the service life of parts.
For a historical review of these and other areas of biomedical telemetry please refer to the surveys by Gong Liu and Li[1], Vuoristo and Vihinen[2], Bachmann and Industrial[3], Lin[4].Nickel-base alloy powder has excellent comprehensive performance of wear and corrosion resistance, heat resistance and other excellent properties, and it could be widely used as the surface hardening material[5].This paper studied effects of different process parameters such as laser power, scanning speed, powder-bed depth on the microstructure of cladding layer. 2.
THE RESULTS OF EXPERIMENT 3.1 EFFECT OF LASER POWER ON THE MICROSTRUCTURE AND PROOERTIES OF CLADDING LAYER The laser power was the most important process parameters in laser cladding, The laser power could also affect the dilution rate of TiC and carbide hard phase in cladding layer, higher laser power would significantly increase the dilution of carbide hard phase in cladding layer, which influences the performance of cladding layer. 3.1.1 INFLUENCE OF LASER POWER ON THE CLADING LAYER OF TITANIUM CARBIDE’S DISSOLUTION AND PRECIPITATION Dissolution and precipitation behavior of titanium carbide in cladding layer was directly linked to the pores and cracks in the laser cladding layer.
With comprehensive consideration of various factors, when the powder layer thickness is 0.5mm, power is 300W to 350W, scanning speed of 15mm/s can be the best technology parameters，and it we can get the cladding layer without pores and cracks, and its dilution rate was low. 5.