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Online since: July 2017
Authors: Welf Guntram Drossel, Inaki Navarro y de Sosa, Thomas Mäder, Björn Senf, Peter Wolf, Martin Hamm, Martin Zoch
This changes the laminate structure and their mechanical properties.
In order to investigate the sensing properties as well as the mechanical properties of the plain SMA, the wires itself were tested in the beginning.
Results and discussions Electro-mechanical properties of SMA wires.
Electro-mechanical properties of embedded SMA sensors.
Mechano-electrical and thermo-electrical properties were determined in order to evaluate the sensing value of these SMA.
In order to investigate the sensing properties as well as the mechanical properties of the plain SMA, the wires itself were tested in the beginning.
Results and discussions Electro-mechanical properties of SMA wires.
Electro-mechanical properties of embedded SMA sensors.
Mechano-electrical and thermo-electrical properties were determined in order to evaluate the sensing value of these SMA.
Online since: March 2018
Authors: Panakamon Thonglor, Naphat Albutt, Sudarath Suntaropas
In additional, the particle growth of BaCO3 and TiO2 are the major factors to affect of the particle growth mechanism.
BaTiO3 is a good candidate for a various applications because of its high electric constant, ferroelectric properties, and positives temperature coefficient resistors [1,2].
Moreover, the characteristics of BaTiO3 powders had affected to the properties of the final product, such as fine particle size, wide size distribution and the degree of particle agglomeration [4].
Therefore, the intimate mixing of the starting powders is a key factor for BaTiO3 preparation.
Bruni, Effect of mechanical milling on solid state formation of BaTiO3 from BaCO3-TiO2 (rutile) mixtures, Thermochimics Acta. 374 (2001) 151-158
BaTiO3 is a good candidate for a various applications because of its high electric constant, ferroelectric properties, and positives temperature coefficient resistors [1,2].
Moreover, the characteristics of BaTiO3 powders had affected to the properties of the final product, such as fine particle size, wide size distribution and the degree of particle agglomeration [4].
Therefore, the intimate mixing of the starting powders is a key factor for BaTiO3 preparation.
Bruni, Effect of mechanical milling on solid state formation of BaTiO3 from BaCO3-TiO2 (rutile) mixtures, Thermochimics Acta. 374 (2001) 151-158
Online since: September 2011
Authors: Qi Ming Yang, Li Jie Yang
Fracturing pump valve's failure, except wear and tear factors, and also decided by the scope of it's contact stress, material and heat treatment in technology.
Through the analysis of these, some conclusions had been found: The content of remnant austenite would be affected the performance of wear resistance, and the core hardness would be directly affected the working life of it.
From Fig.4, you should be found a lot of ferrite should be brought about unfavorable effect to the mechanical properties in the core area, and would be led to distortion and fissures appeared, and accelerated the failure of the valves.
Conclusion According to the analysis above, some conclusions could be obtained: The content of remnant austenite would be affected the performance of wear resistance, and the core hardness would be directly affected the working life of it.
[3] Yang Qiming et al, Resisting Wear's Property Research of the Material of New Type Fracturing Pump's Valve.
Through the analysis of these, some conclusions had been found: The content of remnant austenite would be affected the performance of wear resistance, and the core hardness would be directly affected the working life of it.
From Fig.4, you should be found a lot of ferrite should be brought about unfavorable effect to the mechanical properties in the core area, and would be led to distortion and fissures appeared, and accelerated the failure of the valves.
Conclusion According to the analysis above, some conclusions could be obtained: The content of remnant austenite would be affected the performance of wear resistance, and the core hardness would be directly affected the working life of it.
[3] Yang Qiming et al, Resisting Wear's Property Research of the Material of New Type Fracturing Pump's Valve.
Online since: June 2012
Authors: Wu Bin, Fan Chun
They found atomic particle size is the main factors of the diffusion reaction from 40ms to 160ms.
PVdF fiber membranes have a good absorption properties and good mechanical strength because it has three-dimensional network structure.
However, due to the increasing flexibility of high-polymerized polymer chain under high temperature, mechanical properties go bad in service.
Furthermore, the tensile strength of the polymer mechanical properties added significantly to 160% with 5% wt of the filler added.
This new approach of embedded and insulated hybrid nanofillers could help to develop a new generation of polymer nanocomposite electrolytes with high ion conductivity and improved mechanical properties.
PVdF fiber membranes have a good absorption properties and good mechanical strength because it has three-dimensional network structure.
However, due to the increasing flexibility of high-polymerized polymer chain under high temperature, mechanical properties go bad in service.
Furthermore, the tensile strength of the polymer mechanical properties added significantly to 160% with 5% wt of the filler added.
This new approach of embedded and insulated hybrid nanofillers could help to develop a new generation of polymer nanocomposite electrolytes with high ion conductivity and improved mechanical properties.
Online since: June 2012
Authors: Quan Zhen Jiang, Yun Kai Li, Chuan Sun, Yun Fei Wang, Ming Ming Wan, Ling Bo Zhu
The effect of the Al2O3 additive on the densification behavior, microstructure and mechanical properties of the B4C–xwt%Al2O3 composites sintered by means of spark plasma sintering (SPS) process were investigated.
The composite samples which with an addition of 4 wt% Al2O3 and sintering at 1750oC exhibits excellent mechanical properties (relative density: 98.82%, hardness: 90.6 HRA).
Introduction Boron carbide is an important special engineering ceramic material which has excellent physical and mechanical properties.
As a result of these improvements in density, the mechanical properties of B4C are enhanced remarkably.
These affects lead to enhancement in hardness.
The composite samples which with an addition of 4 wt% Al2O3 and sintering at 1750oC exhibits excellent mechanical properties (relative density: 98.82%, hardness: 90.6 HRA).
Introduction Boron carbide is an important special engineering ceramic material which has excellent physical and mechanical properties.
As a result of these improvements in density, the mechanical properties of B4C are enhanced remarkably.
These affects lead to enhancement in hardness.
Online since: August 2011
Authors: R. Ashofteh, A. Rastkerdar, S. Kolahdouz, A. Daneshi
Surface integrity in CFG process is influenced by four main factors including surface roughness, superficial micro-crack, burning and changes in micro-hardness.
These surface characteristics called Surface integrity, concern not only the topological (geometric) aspects of surface but rather the whole assemblage of their physical, mechanical, metallurgical, chemical and biological properties and characteristics [1].
The chemical composition, mechanical and Physical properties of cast nickel- based superalloy Inconel 792-5A are given in Table 1.
Table 1: Nominal Composition (wt.%), Mechanical and Physical properties of Inconel 792-5A Inconel 792 C Mn Si Cr Ni W Ti Fe Nominal Composition (Wt.%) 0.070-0.090 0.10 0.050 12.20-12.80 Balance 3.85-4.25 3.75-4.15 0.50 Hardness 38 [HRC] Density 8250 [Kg/m^3] Tensile Stress rupture properties Temp (ºC) Ultimate tensile strength(N/mm2) Yield strength, 0.2% offset (N/mm2) Elongation (%) Reduction in Area (%) Temp (ºC) Stress (N/mm2) Life (Hours.)
CFG with one pass (CD or NCD) increase the depth of the affected surface layer and have negative effect on the ground superficial properties.
These surface characteristics called Surface integrity, concern not only the topological (geometric) aspects of surface but rather the whole assemblage of their physical, mechanical, metallurgical, chemical and biological properties and characteristics [1].
The chemical composition, mechanical and Physical properties of cast nickel- based superalloy Inconel 792-5A are given in Table 1.
Table 1: Nominal Composition (wt.%), Mechanical and Physical properties of Inconel 792-5A Inconel 792 C Mn Si Cr Ni W Ti Fe Nominal Composition (Wt.%) 0.070-0.090 0.10 0.050 12.20-12.80 Balance 3.85-4.25 3.75-4.15 0.50 Hardness 38 [HRC] Density 8250 [Kg/m^3] Tensile Stress rupture properties Temp (ºC) Ultimate tensile strength(N/mm2) Yield strength, 0.2% offset (N/mm2) Elongation (%) Reduction in Area (%) Temp (ºC) Stress (N/mm2) Life (Hours.)
CFG with one pass (CD or NCD) increase the depth of the affected surface layer and have negative effect on the ground superficial properties.
Online since: December 2011
Authors: Fang Wang, Jie Guang Song, Yin Yan Ju, Shi Bin Li, Min Han Xu
Influence of sintering temperature on the properties of porous quartz ceramics via the atmospheric pressure sintering method
Jieguang Song1 a, Fang Wang1, Yinyan Ju1, Minghan Xu1 and Shibin Li 1
1 Jiujiang Key Laboratory of Green Remanufacturing, School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang, Jiangxi, 332005, China
a songjieguang@163.com
Keywords: Porous quartz ceramics, Sintering temperature, River sand, Properties.
For most of these applications, the ceramic materials need to fulfill specific requirements regarding their microstructure, porosity, permeability and mechanical properties. [7].
To tailor the properties for each application it is necessary to control the factors affecting the sintering process such as the initial particle characteristics, the microstructure, the additives and the processing technique [8].
In this paper, porous quartz ceramics were fabricated using river sand from the Yangtze River in China, the influence of sintering temperature on properties of quartz porous ceramics were investigated.
For most of these applications, the ceramic materials need to fulfill specific requirements regarding their microstructure, porosity, permeability and mechanical properties. [7].
To tailor the properties for each application it is necessary to control the factors affecting the sintering process such as the initial particle characteristics, the microstructure, the additives and the processing technique [8].
In this paper, porous quartz ceramics were fabricated using river sand from the Yangtze River in China, the influence of sintering temperature on properties of quartz porous ceramics were investigated.
Online since: August 2023
Authors: Aleksandar Sedmak, Simon Sedmak, Mihajlo Aranđelović, Branislav Đorđević, Radomir Jovičić
This will include all of the steps, from developing of initial models which would represent the real behaviour of welded joints with defects with various approximations, to the final stages when fully functional models, which took into account a wide range of different factors for the sake of accuracy.
In both cases, VAC60 was used as filler material, due to its chemical composition (similar to the parent material) and mechanical properties (noticeably better than the PM), as well as availability.
In this case, a more detailed approach was adopted, including the heat affected zone as an individual welded joint region, with its own tensile properties and dimensions, which were determined based on the real specimens, for each group.
This stage of numerical simulations involved two steps: · First, it was assumed that the HAZ and PM had the same tensile properties and these models were used to obtain a sufficiently accurate representation of the experiment · Then, after satisfactory results of the first step were achieved, the heat affected zone was included with its own values of yield stress and tensile strength, which were initially assumed and then varied iteratively until good agreement was achieved between the HAZ of numerical models and specimens.
Since the simualtions presented here were based on a large number of factors, including the mechanical properties of used materials, it can be seen that these factors are related to chemical compositions and welding technologies.
In both cases, VAC60 was used as filler material, due to its chemical composition (similar to the parent material) and mechanical properties (noticeably better than the PM), as well as availability.
In this case, a more detailed approach was adopted, including the heat affected zone as an individual welded joint region, with its own tensile properties and dimensions, which were determined based on the real specimens, for each group.
This stage of numerical simulations involved two steps: · First, it was assumed that the HAZ and PM had the same tensile properties and these models were used to obtain a sufficiently accurate representation of the experiment · Then, after satisfactory results of the first step were achieved, the heat affected zone was included with its own values of yield stress and tensile strength, which were initially assumed and then varied iteratively until good agreement was achieved between the HAZ of numerical models and specimens.
Since the simualtions presented here were based on a large number of factors, including the mechanical properties of used materials, it can be seen that these factors are related to chemical compositions and welding technologies.
Online since: November 2011
Authors: Xing Chang, Xiao Bin Huang
A study on forming process of chips during cutting cast iron
Xiaobin Huang1, Xing Chang1
1 North University of China, School of Mechanical Engineering and Automation, 030051 Taiyuan, China
aforge54@126.com, bmerryjukii@sina.com
Keywords: Brittle metal, cutting, chip, deformation, fracture
Abstract.In the present paper, the effects of the hardness, strength, chemical composition, microstructure, fracture properties of the material and other factors on the chips formation and deformation were studied during cutting the brittle metal.
Fracture properties are also subject to external conditions besides the material properties.
Fig.6 is the schematic diagram of mechanical state.
Secondly, the direction and the number of principal stress affect the size of plastic.
In addition to temperature and deformation rate, the state of stress is also the external conditions to determine the fracture properties.
Fracture properties are also subject to external conditions besides the material properties.
Fig.6 is the schematic diagram of mechanical state.
Secondly, the direction and the number of principal stress affect the size of plastic.
In addition to temperature and deformation rate, the state of stress is also the external conditions to determine the fracture properties.
Online since: May 2016
Authors: Jariah Mohd Juoi, Zaleha Mustafa, Nur Fashiha Sapari, Radzali Othman, Zurina Shamsudin, Siti Hajar Sheikh Md Fadzullah, Nur Fatiha Ishak
Effect of filler loading on physical, mechanical and thermal properties.
%;(c) 20 wt.% ;(d) 30 wt.% ( scale bar = 10 µm) The formation of pores in glass ceramic could be influenced by many factors such as volume of the glass powder, filler [7,8] and others.
Azuraien, Physical and Mechanical Properties of Glass Composite Material Made from Incinerated Scheduled Waste Slag and SLS Waste Glass, Adv.
Wang, The effects of particle size and content on the thermal conductivity and mechanical properties of Al2O3/high density polyethylene (HDPE) composites, eXPRESS Polym.
Thiansem, Effects of charcoal on physical and mechanical properties of fired test briquettes.
%;(c) 20 wt.% ;(d) 30 wt.% ( scale bar = 10 µm) The formation of pores in glass ceramic could be influenced by many factors such as volume of the glass powder, filler [7,8] and others.
Azuraien, Physical and Mechanical Properties of Glass Composite Material Made from Incinerated Scheduled Waste Slag and SLS Waste Glass, Adv.
Wang, The effects of particle size and content on the thermal conductivity and mechanical properties of Al2O3/high density polyethylene (HDPE) composites, eXPRESS Polym.
Thiansem, Effects of charcoal on physical and mechanical properties of fired test briquettes.