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Online since: December 2013
Authors: Muhamad Soqhimi Mohamad Isa, Anika Zafiah M. Rus, Syaafa’at S. Yaanuur, E.S. Masli
The challenge is to find the optimum between the chemistry, the design, the EHS (environment, hygiene, and safety) compliance, and economic factors.
But, considering the properties of PVC, it cannot withstand heat within a long period.
Rus Anika Zafiah: Effect of Titanium Dioxide on Material Properties for Renewable Rapeseed and Sunflower Polyurethane, International Journal of Integrated Engineering (Issues on Mechanical, Materialsand Manufacturing Engineering), Vol.1 (2009), pp.15-22
Rus Anika Zafiah, Material Properties of Novelty Polyurethane Based On Vegetable Oils, The 11th International Conference on QiR (Quality in Research), Depok, Indonesia, (3-6 August 2009)
Part 2; Thermal Degradation and Materials Properties, Prog React Kinetic and Mechanism, Science Reviews, Vol.34 (2009), pp.1-43
But, considering the properties of PVC, it cannot withstand heat within a long period.
Rus Anika Zafiah: Effect of Titanium Dioxide on Material Properties for Renewable Rapeseed and Sunflower Polyurethane, International Journal of Integrated Engineering (Issues on Mechanical, Materialsand Manufacturing Engineering), Vol.1 (2009), pp.15-22
Rus Anika Zafiah, Material Properties of Novelty Polyurethane Based On Vegetable Oils, The 11th International Conference on QiR (Quality in Research), Depok, Indonesia, (3-6 August 2009)
Part 2; Thermal Degradation and Materials Properties, Prog React Kinetic and Mechanism, Science Reviews, Vol.34 (2009), pp.1-43
Fabrication and Characteristics of Hypereutectic Prealloyed Al-Si Powders by Gas Atomization Process
Online since: August 2006
Authors: L.F. Wang, Tae Suk Jang, In Sang Chung, Jin Chun Kim, Yong Jin Kim
Some properties of the samples were
evaluated in this paper.
In particular, P/M Al alloys can be commercially used as candidate materials for automobiles, electronics and aerospace applications because of their lightness and good mechanical properties [2].
Among them Al-Si alloys are the most interest materials for high strength structural components because they have low coefficient of thermal expansion (CTE) as well as high wear resistance and mechanical properties [3, 4].
The mechanical properties of Al-Si alloys are dependent on the volume fraction and size of the eutectic Si particles.
Dynamic pressure in the gas atomization process was an important factor to control the powder size.
In particular, P/M Al alloys can be commercially used as candidate materials for automobiles, electronics and aerospace applications because of their lightness and good mechanical properties [2].
Among them Al-Si alloys are the most interest materials for high strength structural components because they have low coefficient of thermal expansion (CTE) as well as high wear resistance and mechanical properties [3, 4].
The mechanical properties of Al-Si alloys are dependent on the volume fraction and size of the eutectic Si particles.
Dynamic pressure in the gas atomization process was an important factor to control the powder size.
Online since: January 2005
Authors: F. Pan, J.J. Chen, Fei Zeng, Y. Gao, D.M. Li
ZnO thin film, as a promising piezoelectric material, possesses unique electrical,
acoustical, and optical properties.
The electronic and acoustic properties of the SAWF were studied by radio-frequency network analyzer.
A rough surface would affect the polarization properties of the film and reduce the piezoelectric effect, then augment the insertion loss greatly [9].
When operating high frequency SAW devices, it requires better mechanical properties of piezoelectric film to endure the stress of electrodes engendered from SAW spreading and have good adhesion to the substrates.
The mechanical properties of the ZnO films were investigated by means of nanoindentation measurement and scratch testing on a MTS XP nanodenter system, equipped with the continuous stiffness measurement (CSM) option.
The electronic and acoustic properties of the SAWF were studied by radio-frequency network analyzer.
A rough surface would affect the polarization properties of the film and reduce the piezoelectric effect, then augment the insertion loss greatly [9].
When operating high frequency SAW devices, it requires better mechanical properties of piezoelectric film to endure the stress of electrodes engendered from SAW spreading and have good adhesion to the substrates.
The mechanical properties of the ZnO films were investigated by means of nanoindentation measurement and scratch testing on a MTS XP nanodenter system, equipped with the continuous stiffness measurement (CSM) option.
Online since: March 2025
Authors: Van Viet Ma, Trong Hieu Bui, Huu Nghi Huynh, Chiet Quan Han, Van Vu Le
Introduction
Recent studies on technology groups utilizing liquid plastic materials, such as Liquid Crystal Display (LCD) technology, have demonstrated their capability to produce items with intricate shapes, remarkable flexibility, and the ability to achieve high-resolution mechanical and chemical properties.
Ibrahim et al. [5] examined how factors like layer thickness and exposure time influence quality.
The authors concluded that a layer thickness of 50 μm and an exposure time of 9 seconds would give the best mechanical properties with the smallest dimensional deviation.
The experimental plan is designed according to the FCCCD method, with the number of influencing factors k = 5, including 32 samples.
This shows that the ANN model is fully capable of predicting and optimizing other quality criteria for AM products in general and 3D printing resin according to DLP technology in particular built on desktop devices such as: surface properties, mechanical properties, etc.
Ibrahim et al. [5] examined how factors like layer thickness and exposure time influence quality.
The authors concluded that a layer thickness of 50 μm and an exposure time of 9 seconds would give the best mechanical properties with the smallest dimensional deviation.
The experimental plan is designed according to the FCCCD method, with the number of influencing factors k = 5, including 32 samples.
This shows that the ANN model is fully capable of predicting and optimizing other quality criteria for AM products in general and 3D printing resin according to DLP technology in particular built on desktop devices such as: surface properties, mechanical properties, etc.
Online since: November 2015
Authors: Vaishal J. Banker, Jitendra M. Mistry
Also it is found that the speed was most significant parameter affecting frictional force.
Introduction Inconel and its alloys are widely used in gas turbines, evaporators, condensers, heat-exchangers, chemical processing plants and pressure vessels application as it sustains mechanical properties at high temperatures.
Due to the wear resistant property friction force behavior is an interested area in Inconel alloys.
Taguchi’s method of experimental design is an efficient way to determine the optimum factor level combinations to achieve a minimum standard deviation (variation) while keeping the mean on the target.
The input parameters (factors) which are considered in sliding wear are load, speed, wear track diameter and pin heating temperature have 3 levels each.
Introduction Inconel and its alloys are widely used in gas turbines, evaporators, condensers, heat-exchangers, chemical processing plants and pressure vessels application as it sustains mechanical properties at high temperatures.
Due to the wear resistant property friction force behavior is an interested area in Inconel alloys.
Taguchi’s method of experimental design is an efficient way to determine the optimum factor level combinations to achieve a minimum standard deviation (variation) while keeping the mean on the target.
The input parameters (factors) which are considered in sliding wear are load, speed, wear track diameter and pin heating temperature have 3 levels each.
Online since: July 2013
Authors: Hui Mei Zhang, Hai Bo Cao, Xiang Miao Xie
The number of tunnels built in the high-altitude and cold conditions is increasing continuously followed with the transfer of economic construction to the western part of the country, the temperature change is one of the important factors that affect the mechanical properties of the rock, and has a significant impact on the stability of the geotechnical engineering in cold regions[3-7].
The physical and mechanical parameters of the surrounding rock are shown in references [3].
Advance and review on thermo-hydro- mechanical characteristics of rock mass under condition of low temperature and freeze- thaw cycles[J].
Freeze-thaw cycling and mechanical experiment and damage propagation characteristics of rock[J].
Determination of some thermo-mechanical properties of Sirahama sandstone under subzero temperature condition[J].
The physical and mechanical parameters of the surrounding rock are shown in references [3].
Advance and review on thermo-hydro- mechanical characteristics of rock mass under condition of low temperature and freeze- thaw cycles[J].
Freeze-thaw cycling and mechanical experiment and damage propagation characteristics of rock[J].
Determination of some thermo-mechanical properties of Sirahama sandstone under subzero temperature condition[J].
Online since: June 2014
Authors: Masahiko Yoshino, Yohei Shimizu, Kentaro Kono, Motoki Terano
Mechanical & Control Engineering, Tokyo Institute of Technology
Email: myoshino@mes.titech.ac.jp
Keywords: Silicon wafer, damage free machining, ductile manner machining, hydrostatic pressure, finished surface, affected layer
Abstract.
Fluorinert is fire retardancy, and exhibits good insulation property.
Crystal orientation is another important factor that affects roughness of finished surface.
is the stress intensity factor, which is expressed by the following equation, (2) where is tensile stress acting on a micro crack, and is the size of a defect.
Mechanical Science, 43, pp.335-347
Fluorinert is fire retardancy, and exhibits good insulation property.
Crystal orientation is another important factor that affects roughness of finished surface.
is the stress intensity factor, which is expressed by the following equation, (2) where is tensile stress acting on a micro crack, and is the size of a defect.
Mechanical Science, 43, pp.335-347
Online since: February 2013
Authors: Romulus Pascu, Roşu Radu Alexandru, Fulga Doru, Duma Iuliana
Sample M2, BM, [Etched B8, 100x]
· In the heat affected zones (HAZ) – austenitic microstructure with heterophasic zones of δ ferrite and complex carbides (Figures 9 and 10)
Figure 9.
Short-term mechanical tests 2.6.1.
Mechanical characteristics Welded sample mark Research area Mechanical characteristics Rp0,2 [N/mm2] Rm [N/mm2] A5 [%] Z [%] Min.
values Max. values 1 BM (NT) 212 218 523 523 55 57 79 79 2 BM (TT) 226 226 524 526 56 56 77 77 TP 347 steel ASTM A376 --- 205 --- 515 --- 35 --- --- --- 1 Welded joints (NT) --- --- 522 526 --- --- --- --- 2 Welded joints (TT) --- --- 525 527 --- --- --- --- Analyzing the values of mechanical properties of TP347 steel and their welded joints, in untreated and in heat-treated states, it is observed that these values fall within the minimum requirements of ASTM A370. 2.6.3.
But, the lateral expansion, EL as a toughness factor in assessing the deformability from the "V" channel has high values, between 5.80% and 6.5% for the base material (NT and TT state) and lower values in the weld zones (NT and TT), between 2.95% and 3.91%.
Short-term mechanical tests 2.6.1.
Mechanical characteristics Welded sample mark Research area Mechanical characteristics Rp0,2 [N/mm2] Rm [N/mm2] A5 [%] Z [%] Min.
values Max. values 1 BM (NT) 212 218 523 523 55 57 79 79 2 BM (TT) 226 226 524 526 56 56 77 77 TP 347 steel ASTM A376 --- 205 --- 515 --- 35 --- --- --- 1 Welded joints (NT) --- --- 522 526 --- --- --- --- 2 Welded joints (TT) --- --- 525 527 --- --- --- --- Analyzing the values of mechanical properties of TP347 steel and their welded joints, in untreated and in heat-treated states, it is observed that these values fall within the minimum requirements of ASTM A370. 2.6.3.
But, the lateral expansion, EL as a toughness factor in assessing the deformability from the "V" channel has high values, between 5.80% and 6.5% for the base material (NT and TT state) and lower values in the weld zones (NT and TT), between 2.95% and 3.91%.
Online since: June 2014
Authors: Kai Sun, Dong Qing Zhang, Fei Wu, Yan Hua Sun
Thereby, it affects the accuracy and reliability of the application process.
Factors such as unstable voltage, air flow changes will affect the smoothness of the expansion line.
Sample material properties would not be changed in the temperature range.
Figure.2 Al2O3 standard measurement repeatability expansion curve 5 Conclusions The thermal expansion coefficient is one of the important physical properties of the glass.
The properties of materials have played an important role in the measurement process.
Factors such as unstable voltage, air flow changes will affect the smoothness of the expansion line.
Sample material properties would not be changed in the temperature range.
Figure.2 Al2O3 standard measurement repeatability expansion curve 5 Conclusions The thermal expansion coefficient is one of the important physical properties of the glass.
The properties of materials have played an important role in the measurement process.
Online since: July 2012
Authors: You Xi Lin, Fu Shan He, Wei Xie
Developed bamboo fiber reinforced composites have excellent friction and wear properties and good stability.
The tribological properties of brake pads are determined by three aspects: internal factors, friction and wear mechanism and external factors, including velocity, pressure, wet and dry conditions, braking frequency and braking duration etc., corresponding to extreme conditions like high speed, overlap, the rain and snow, and long downhill etc., which are confirmed as the main cause of road accidents.
Blau and McLaughlin reported that material properties play a dominant role in the dry behaviour while fluid dynamics play a major role in the wet behaviour[7].
As is shown in Fig. 3, wear properties of sample and counterpart are quite different between dry and wet friction conditions.
These two factors make high-speed wear rate larger.
The tribological properties of brake pads are determined by three aspects: internal factors, friction and wear mechanism and external factors, including velocity, pressure, wet and dry conditions, braking frequency and braking duration etc., corresponding to extreme conditions like high speed, overlap, the rain and snow, and long downhill etc., which are confirmed as the main cause of road accidents.
Blau and McLaughlin reported that material properties play a dominant role in the dry behaviour while fluid dynamics play a major role in the wet behaviour[7].
As is shown in Fig. 3, wear properties of sample and counterpart are quite different between dry and wet friction conditions.
These two factors make high-speed wear rate larger.