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Online since: June 2013
Authors: Dao Xia Wu, Jun Xue Ren, Ding Hua Zhang, Chang Feng Yao, Liang Tan
Thomas et al. [5
] found that alignment and density of the intense slip bands depended on the subsurface alpha grain orientation, such microstructural subsurface damage could degrade material properties.
Mechanical properties in normal and high temperature are shown in Table2.
Table 1 Chemical composition of TB6(mass fraction, %) Element H O N Fe Al V Ti Wt pct 0.01 0.03 0.03 1.93 2.95 10.15 balance Table 2 Mechanical properties of TB6 Normal temperature ≥ High temperature ≥ tensile strength σb/Mpa 1005 testing temperature ℃ 350 yield strength σ0.2/Mpa 1035 tensile strength σb/Mpa 963 elongation δ/% 11.1 fracture strength σ100/Mpa 840 shrinkage rage ψ/% 64.4 elongation δ/% 16.8 impact value аk/J·cm-2 60 shrinkage rage ψ/% 70.8 Cutting Condition.
End milling diagram In order to study the effect of milling parameters on surface integrity, orthogonal experiments of three factors and three levels were conducted.
Wang, in: Journal of Mechanical Strength, vol. 32 (2010), p. 53-57 (in Chinese) [10] S.
Mechanical properties in normal and high temperature are shown in Table2.
Table 1 Chemical composition of TB6(mass fraction, %) Element H O N Fe Al V Ti Wt pct 0.01 0.03 0.03 1.93 2.95 10.15 balance Table 2 Mechanical properties of TB6 Normal temperature ≥ High temperature ≥ tensile strength σb/Mpa 1005 testing temperature ℃ 350 yield strength σ0.2/Mpa 1035 tensile strength σb/Mpa 963 elongation δ/% 11.1 fracture strength σ100/Mpa 840 shrinkage rage ψ/% 64.4 elongation δ/% 16.8 impact value аk/J·cm-2 60 shrinkage rage ψ/% 70.8 Cutting Condition.
End milling diagram In order to study the effect of milling parameters on surface integrity, orthogonal experiments of three factors and three levels were conducted.
Wang, in: Journal of Mechanical Strength, vol. 32 (2010), p. 53-57 (in Chinese) [10] S.
Online since: June 2012
Authors: Wei Lai Chen, Miao Miao He, Mao Yi Zhang, Zhan Chang Tang
Textile should have certain mechanical strength, and therefore tensile property is one of the most basic testing items in textile production[3].
The tensile properties of textile materials include strength and elongation.
It shows that the mechanical properties of floret silk/cotton sports socks are quite well.
Breathability affected wear feeling comfort properties directly such as breathe freely, function of cool, heat keeping and insulation.
Air permeability of the fabric depends on the pore size and pore number in fabric, thus thickness and density of the fabric are the very direct effect factors to breathability.
The tensile properties of textile materials include strength and elongation.
It shows that the mechanical properties of floret silk/cotton sports socks are quite well.
Breathability affected wear feeling comfort properties directly such as breathe freely, function of cool, heat keeping and insulation.
Air permeability of the fabric depends on the pore size and pore number in fabric, thus thickness and density of the fabric are the very direct effect factors to breathability.
Online since: January 2014
Authors: Tsai Cheng Li, Rwei Ching Chang, Yan Jun Chen
Furthermore, the effects of the PEDOT:PSS on the mechanical properties of the OLED are also studied.
In addition to electrical and optical properties, mechanical properties also play a significant role in OLEDs.
However, study of the mechanical properties of organic electronic devices is still rare in literature.
Furthermore, the microstructure and mechanical properties of the devices are also discussed.
The microstructure, mechanical properties, and luminance of the OLEDs are tested.
In addition to electrical and optical properties, mechanical properties also play a significant role in OLEDs.
However, study of the mechanical properties of organic electronic devices is still rare in literature.
Furthermore, the microstructure and mechanical properties of the devices are also discussed.
The microstructure, mechanical properties, and luminance of the OLEDs are tested.
Online since: August 2014
Authors: Rong Yue Xie, Shan Chao Tu, Feng Li, Na Fang
The hydraulic system caused by a bad seal leakage is a common fault system is also an important factor affecting the system work properly .
On the other hand, the physical properties of the seal is often due to the chemical resistance and improved heat resistance deteriorates.
According to the geometry , boundary conditions sealing structure , material properties and the symmetry of the load ring , which was simplified to a plane axisymmetric model .
Water is also a common contaminant in mineral oil, one affects the lubricating properties of the hydraulic fluid and cause aging of the sealing material at high temperatures, cracking or decomposition of the sealing material.
Mechanical Engineering Materials .
On the other hand, the physical properties of the seal is often due to the chemical resistance and improved heat resistance deteriorates.
According to the geometry , boundary conditions sealing structure , material properties and the symmetry of the load ring , which was simplified to a plane axisymmetric model .
Water is also a common contaminant in mineral oil, one affects the lubricating properties of the hydraulic fluid and cause aging of the sealing material at high temperatures, cracking or decomposition of the sealing material.
Mechanical Engineering Materials .
Online since: February 2011
Authors: Li Li Meng, Chun Guang Lu, Hui Zhen Zhao
Analysis and Improvement
Excellent mechanical properties of saw baldes are obtained after heat treatment: good dynamics , even hardness and uniform stress,these characters can ensure the saw blade is not distortion easily in sawing.
But if we want get saw blades of high properties,we mast master temperature , time and quenching hardness in the process of heat treatment.
There are three factors in this test: tempering temperature(A), tempering time (B), quenching hardness (C) , each factor can take three levels, the level of test factors is shown in table 3.
Table 3 The level of test factors Tempering temperature (A) Tempering time (B) Quenching hardness (C) Other factors 1 6h 60HRC 1 2 8h 62HRC 2 3 10h 63HRC 3 We choose L9(34) orthogonal table to begin the test , and record results of each test, results is shown in table 4.
We can also list the primary and secondary factors according to range analyse,temperature is prioritized, tempering time and quenching hardness are following .
But if we want get saw blades of high properties,we mast master temperature , time and quenching hardness in the process of heat treatment.
There are three factors in this test: tempering temperature(A), tempering time (B), quenching hardness (C) , each factor can take three levels, the level of test factors is shown in table 3.
Table 3 The level of test factors Tempering temperature (A) Tempering time (B) Quenching hardness (C) Other factors 1 6h 60HRC 1 2 8h 62HRC 2 3 10h 63HRC 3 We choose L9(34) orthogonal table to begin the test , and record results of each test, results is shown in table 4.
We can also list the primary and secondary factors according to range analyse,temperature is prioritized, tempering time and quenching hardness are following .
Fracture Toughness of Different Locations in API X80 Pipeline Steel on Low Constraint SENT Specimens
Online since: September 2016
Authors: Xu Chen, Gang Chen, Xin Wang, Hong Sheng Lu, Yong He Yang
As contemporary pipeline steel fracture toughness cannot be characterized by critical elastic stress intensity factors (e.g.
Due to high-strength pipeline steel is rolled, the tensile properties is anisotropic [8].
Some investigations on microstructure and mechanical properties of submerged arc welded HSLA steel joints.
Role of tandem submerged arc welding thermal cycles on properties of the heat affected zone in X80 microalloyed pipe line steel.
Effects of acicular ferrite on charpy impact properties in heat affected zones of oxide-containing API X80 linepipe steels.
Due to high-strength pipeline steel is rolled, the tensile properties is anisotropic [8].
Some investigations on microstructure and mechanical properties of submerged arc welded HSLA steel joints.
Role of tandem submerged arc welding thermal cycles on properties of the heat affected zone in X80 microalloyed pipe line steel.
Effects of acicular ferrite on charpy impact properties in heat affected zones of oxide-containing API X80 linepipe steels.
Online since: May 2011
Authors: Ke Wei Xu, Ling Zhao, Geng Rong Chang, Shi Guang Shang
Controllable growth and Gas Sensitivity Properties of Zinc Oxide Nanocrystalline by Solid-state Reaction
Shiguang Shang1,2, a, Kewei Xu1,b, , Ling Zhao2, and Gengrong Chang1
1State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Shaanxi Xi'an, 710049, China
2School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Shaanxi Xi'an, 710121, China
ashangshiguang05@163.com, bkwxu@mail.xjtu.edu.cn
Key words: Zinc oxide nanocristalline; gas sensor; sensitivity
Abstract.
Systematic experiments were carried out to investigate the factors that affect the morphologies of the samples.
The gas sensitivity properties of ZnO nanocrystalline thin films are investigated by observing the change of capacitance and conductance with a planar capacitor.
Especially for gas sensor, sensitivity properties of nano-ZnO are directly related to its preparation history, particle size, and surface to volume ratio, morphology and operating temperature.
Thirdly, the sensitive properties with high response and sensitivity to ethanol based on ZnO nanocrystalline films have been obtained.
Systematic experiments were carried out to investigate the factors that affect the morphologies of the samples.
The gas sensitivity properties of ZnO nanocrystalline thin films are investigated by observing the change of capacitance and conductance with a planar capacitor.
Especially for gas sensor, sensitivity properties of nano-ZnO are directly related to its preparation history, particle size, and surface to volume ratio, morphology and operating temperature.
Thirdly, the sensitive properties with high response and sensitivity to ethanol based on ZnO nanocrystalline films have been obtained.
Online since: May 2015
Authors: Kok Tee Lau, Chantara Thevy Ratnam, Sahrim Haji Ahmad, Noraiham Mohamad, Rose Farahiyan Munawar, Jeeferie Abd. Razak, Hairul Effendy Ab Maulod, Mazlin Aida Mahamood
Effects of GNPs-C0890 loading variation to the mechanical tensile properties and fracture morphologies of NR/EPDM nanocomposites rubber blend were studied.
In this paper, NR/EPDM rubber blend filled with untreated and non-covalent treated GNPs at various loadings were prepared and tested for their mechanical tensile properties.
The difference in morphological character of the treated and untreated GNPs may affect the mechanical tensile properties and the fracture morphologies of the composite.
Table 2 Mechanical tensile properties of NR/EPDM blends filled non-covalent treated and untreated GNPs at various loadings.
Nutt, Covalent polymer functionalization of graphene nanosheets and mechanical properties of composites, J.
In this paper, NR/EPDM rubber blend filled with untreated and non-covalent treated GNPs at various loadings were prepared and tested for their mechanical tensile properties.
The difference in morphological character of the treated and untreated GNPs may affect the mechanical tensile properties and the fracture morphologies of the composite.
Table 2 Mechanical tensile properties of NR/EPDM blends filled non-covalent treated and untreated GNPs at various loadings.
Nutt, Covalent polymer functionalization of graphene nanosheets and mechanical properties of composites, J.
Online since: February 2013
Authors: Ying Qiang Xu, Zu Heng Shi, Jian Hua Zhao
Introduce
Gear as an important part of modern mechanical transmission, is widely used in all kinds of machinery and equipment.
Its fatigue properties is the key to the transmission system limited life design, reliability design data.
Due to factors affecting the gear fatigue life, and the post-processing of the results is a probability and statistics events.
Mechanical design.
Experimental Study on 17CrNiMo6 carburized gear contact fatigue properties Ship Science and Technology .2010,8:89-91 [9] GB/T14229-93.
Its fatigue properties is the key to the transmission system limited life design, reliability design data.
Due to factors affecting the gear fatigue life, and the post-processing of the results is a probability and statistics events.
Mechanical design.
Experimental Study on 17CrNiMo6 carburized gear contact fatigue properties Ship Science and Technology .2010,8:89-91 [9] GB/T14229-93.
Online since: August 2017
Authors: Prapas Muangjunburee, Teerachod Treeparee
Weld deposition of hardfacing is used for repairing mechanical components in mining, sugar industry and others.
The abrasive resistance of FCAW deposits depends on several factors that strongly influence solidification and the solution of the weld metal such as heat input, the number of layers and the type of shielding gas but it depends mainly on the microstructure which defines their properties [5].
Chromium steel is sensitive to crack in heat affected zone (HAZ).
The preheating of sample have affect hardness value at HAZ regions. 2.
Dilution can affect to microstructure and mechanical properties of hardfacing deposit.
The abrasive resistance of FCAW deposits depends on several factors that strongly influence solidification and the solution of the weld metal such as heat input, the number of layers and the type of shielding gas but it depends mainly on the microstructure which defines their properties [5].
Chromium steel is sensitive to crack in heat affected zone (HAZ).
The preheating of sample have affect hardness value at HAZ regions. 2.
Dilution can affect to microstructure and mechanical properties of hardfacing deposit.