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Online since: November 2013
Authors: Ting Zhi Liu, Huan Ke, Shu Wang Duo, Hao Zhang, Zi Hao Zhou, Xiang Min Xu, Xiao Yan Fei
The morphologies of the coatings changed obviously with the various VB, and VB could improve the mechanical properties of CrN coatings.
Besides, TS also played a very important role in improving the mechanical properties.
Fig.7 is a graph about the mechanical properties of CrN coatings at different VBs (Left: R.T.; Right: 300°C).
CrN coating with the parameters (TS=300°C, VB=-30V) showed wonderful mechanical properties.
In addition, VB could improve the mechanical properties of CrN coatings as well as TS was also a very key factor.
Besides, TS also played a very important role in improving the mechanical properties.
Fig.7 is a graph about the mechanical properties of CrN coatings at different VBs (Left: R.T.; Right: 300°C).
CrN coating with the parameters (TS=300°C, VB=-30V) showed wonderful mechanical properties.
In addition, VB could improve the mechanical properties of CrN coatings as well as TS was also a very key factor.
Online since: October 2007
Authors: Lorella Ceschini, Lorenzo Donati, Luca Tomesani, Iuri Boromei
The particular thermo-mechanical history of each point in different experiments
was then reconstructed by FEM analysis.
It is known that mechanical properties of the products are closely dependent on the microstructure, which in turn is affected by the thermo-mechanical history, as it is determined by the process sequence [1-5].
Main factors influencing the mechanical, corrosion and aesthetical properties of the product, as well as the ease of extrusion, are the grain size and the presence and distribution of intermetallic compounds.
Particular care was taken in determining the friction factor governing the process, as it was determined by the particular lubricant used at the toolmaterial interface, inasmuch as it affected the strain and strain rate distribution.
A mean friction factor of 0.23 was then used in the process simulations.
It is known that mechanical properties of the products are closely dependent on the microstructure, which in turn is affected by the thermo-mechanical history, as it is determined by the process sequence [1-5].
Main factors influencing the mechanical, corrosion and aesthetical properties of the product, as well as the ease of extrusion, are the grain size and the presence and distribution of intermetallic compounds.
Particular care was taken in determining the friction factor governing the process, as it was determined by the particular lubricant used at the toolmaterial interface, inasmuch as it affected the strain and strain rate distribution.
A mean friction factor of 0.23 was then used in the process simulations.
Online since: July 2022
Authors: Vladimír Mára, Jakub Horník, Radek Bednář
Mechanical properties were determined by uniaxial tensile test and hardness testing.
Microstructure development during the shaping process is one of the most important factors that affects the overall properties of the final part.
The 60% deformation acts as a threshold, where the pattern for mechanical properties is changing.
With increasing deformation, the mechanical properties are increasing as well.
Jen, Intermetallics Formation and Their Effect on Mechanical Properties of Al-Si-X Alloys.
Microstructure development during the shaping process is one of the most important factors that affects the overall properties of the final part.
The 60% deformation acts as a threshold, where the pattern for mechanical properties is changing.
With increasing deformation, the mechanical properties are increasing as well.
Jen, Intermetallics Formation and Their Effect on Mechanical Properties of Al-Si-X Alloys.
Online since: February 2022
Authors: Vladislav Smolentsev, Alexander Norman, Igor Starodubtsev, Anna Norman
Difficulty in developing additive technology for forming small diameter channels (0.6... 3.0 mm) with galvanic-mechanical coatings consists in an integrated approach to the design of the process, which should take into account not only the requirements for the output characteristics of the formed layer (dimensional and geometric accuracy, high quality, corrosion resistance), but also multiple factors related to the process conditions, starting from the calculation of the design of the ET, GMC modes, and ending with physical and chemical processes occurring in the treatment zone.
If you choose the modes, it should be taken into consideration that the such coatings must be uniform and have a non-porous structure at a given thickness, have low roughness, and good adhesive properties.
This change is due to the fact that the purity of the hole treatment and the geometry of the leading edge determine the flow factor.
Analysis of the adhesion properties of the GMC layers showed that for the range of treatment modes under consideration, the adhesion strength of chromium to the substrate is higher than the strength of the coating itself.
Mechanical Engineering, Moscow, 2005, pp. 77-81
If you choose the modes, it should be taken into consideration that the such coatings must be uniform and have a non-porous structure at a given thickness, have low roughness, and good adhesive properties.
This change is due to the fact that the purity of the hole treatment and the geometry of the leading edge determine the flow factor.
Analysis of the adhesion properties of the GMC layers showed that for the range of treatment modes under consideration, the adhesion strength of chromium to the substrate is higher than the strength of the coating itself.
Mechanical Engineering, Moscow, 2005, pp. 77-81
Online since: May 2014
Authors: Carla Gambaro, Enrico Lertora, Chiara Mandolfino
The design of the tools is done considering some factors related to the material with which they will be realized and others related to the geometry.
The material must therefore be characterized by good mechanical properties at high temperatures, good oxidation resistance at high temperatures and low thermal conductivity [1-3].
Satoh, Mechanical properties of high purity polycrystalline cBN synthesized by direct conversion sintering method, Journal of materials science, 35 (2000) 1181-1186)
Liu, Effect of rotation speed on microstructure and mechanical properties of Ti-6Al-4V friction stir welded joints, Materials and design, 31 (2010) 2631-2636
Hirano Microstructural characteristics and mechanical properties of Ti-6Al-4V friction stir welds, Materials and design, 31 (2010) 1650-1655
The material must therefore be characterized by good mechanical properties at high temperatures, good oxidation resistance at high temperatures and low thermal conductivity [1-3].
Satoh, Mechanical properties of high purity polycrystalline cBN synthesized by direct conversion sintering method, Journal of materials science, 35 (2000) 1181-1186)
Liu, Effect of rotation speed on microstructure and mechanical properties of Ti-6Al-4V friction stir welded joints, Materials and design, 31 (2010) 2631-2636
Hirano Microstructural characteristics and mechanical properties of Ti-6Al-4V friction stir welds, Materials and design, 31 (2010) 1650-1655
Online since: December 2014
Authors: Yong Quan Yuan, Xue Liang Jiang, Zhong Lin Zhu, Jiang Chen
Experimental study on the compressive strength of cement mortar
Yongquan Yuan1, Xueliang Jiang1(Corresponding author),
Zhonglin Zhu1, Jiang Chen1
1School of Civil Engineering and mechanics,
Central South University of Forestry and Technology, Changsha 410004, China
Keywords: Cement mortar, Compressive strength, Mechanical properties, Water cement ratio, Linear regression
Abstract: Cement mortar is an ideal similar material.
The changing rule of the cement mortar strength along with age was also analyzed.Through the test, the mortar mixture ratio that was consistent with the original rock mechanical properties was determined ultimately.
High performance cement mortar usually has higher mechanical properties, good durability and so on[3].
Conclusions (1) In a certain extent, the compressive strength of cement mortar is affected by the time, so the testing time shall be strictly controlled in 20 min at most
(2) Comparing the test results and the original rock mechanics performance, considering the economic factors, the M5, M7.5, M10 optimum mixture ratio of three kinds of strength grade of cement mortar are determined, as 1:6.50:1.21,1:5.58: 1.04,1:5.18:0.96
The changing rule of the cement mortar strength along with age was also analyzed.Through the test, the mortar mixture ratio that was consistent with the original rock mechanical properties was determined ultimately.
High performance cement mortar usually has higher mechanical properties, good durability and so on[3].
Conclusions (1) In a certain extent, the compressive strength of cement mortar is affected by the time, so the testing time shall be strictly controlled in 20 min at most
(2) Comparing the test results and the original rock mechanics performance, considering the economic factors, the M5, M7.5, M10 optimum mixture ratio of three kinds of strength grade of cement mortar are determined, as 1:6.50:1.21,1:5.58: 1.04,1:5.18:0.96
Online since: January 2014
Authors: Bin Yang, Qing Qian Zheng, Hui Min Yang, Min Hu, Ning Chen
The results show that the overall stress and deformation in scroll are the largest when compression chamber is moving near the vent position and the thermal deformation is the main factor of affecting the overall deformation of scroll.
1 Introduction
Scroll compressor is a positive displacement compressor.
The material properties of scroll are shown in Tables 1-2.
Displacement boundary condition is shown in Figure1. 2.2.2 Thermal Boundary Conditions The steady-state temperature distribution of scroll wrap can be made the following assumptions because that temperature distribution is almost the same in steady-state operation of mechanical [4]
From the properties of geometric of scroll wrap known, gas pressure loads can be simplified to internal pressureof angle region that acted on the inner wall surface, its size is pressure difference of two confined compression chambers that had different size.
Thus it can be seen, the thermal deformation is the main factors of affecting the overall deformation of the institution.
The material properties of scroll are shown in Tables 1-2.
Displacement boundary condition is shown in Figure1. 2.2.2 Thermal Boundary Conditions The steady-state temperature distribution of scroll wrap can be made the following assumptions because that temperature distribution is almost the same in steady-state operation of mechanical [4]
From the properties of geometric of scroll wrap known, gas pressure loads can be simplified to internal pressureof angle region that acted on the inner wall surface, its size is pressure difference of two confined compression chambers that had different size.
Thus it can be seen, the thermal deformation is the main factors of affecting the overall deformation of the institution.
Online since: October 2010
Authors: Ming Chen, X.H. Zheng, Qing Long An, Yun Shan Zhang, Gang Liu
So the corrosive resistance and fatigue resistance properties are very important to oil pipes.
The chemical composition and mechanical properties of work material are shown in Table 2 and Table 3.
The depth of affecting layer is small but residual stress is big.
So the surface work hardening is the result of various factors comprehensive action and surface deformation is the major factor of work hardening.
Cutting speed, tool geometry and depth of cutting are the main factors of work hardening.
The chemical composition and mechanical properties of work material are shown in Table 2 and Table 3.
The depth of affecting layer is small but residual stress is big.
So the surface work hardening is the result of various factors comprehensive action and surface deformation is the major factor of work hardening.
Cutting speed, tool geometry and depth of cutting are the main factors of work hardening.
Online since: April 2009
Authors: Nam Ju Jo, Won Ki Lee, Do Hee Lim, Young Min Song, Geong Mi Bark
To conclude, mechanical properties increased with the
increase in hard segment contents.
Mechanical properties.
Mechanical properties according to the hard content of PU(PDMS).
Mechanical properties were enhanced by the increase in the hard segment content.
The hard segment affects the dielectric properties of polymers, so the dielectric constant increases as the hard segment content increases.
Mechanical properties.
Mechanical properties according to the hard content of PU(PDMS).
Mechanical properties were enhanced by the increase in the hard segment content.
The hard segment affects the dielectric properties of polymers, so the dielectric constant increases as the hard segment content increases.
Online since: July 2015
Authors: Chih Kuang Lin, Anindito Purnowidodo, Khairul Anam
Appropriate material properties, boundary conditions, and temperature profiles are applied to calculate the thermal stress distributions at room temperature and operation stage.
In this study, the stress intensity factors will be calculated at the highly stressed regions in the top PEN.
Fig. 8 (b) shows the stress intensity factors of the given three shapes of surface cracks change in a similar trend.
From these results, it could be concluded that defect/crack shapes would affect the thermal stress intensity factor.
More, Effect of Thermal Cycling and Thermal Aging on the Mechanical Properties of, and Residual Stresses in, Ni-YSZ/YSZ Bi-Layers, in Proceedings of the 30th International Conference on Advanced Ceramics and Composites, Cocoa Beach, Florida, January 22-27 (2006) 383-391
In this study, the stress intensity factors will be calculated at the highly stressed regions in the top PEN.
Fig. 8 (b) shows the stress intensity factors of the given three shapes of surface cracks change in a similar trend.
From these results, it could be concluded that defect/crack shapes would affect the thermal stress intensity factor.
More, Effect of Thermal Cycling and Thermal Aging on the Mechanical Properties of, and Residual Stresses in, Ni-YSZ/YSZ Bi-Layers, in Proceedings of the 30th International Conference on Advanced Ceramics and Composites, Cocoa Beach, Florida, January 22-27 (2006) 383-391