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Online since: December 2007
Authors: Pavel Lukáč, Zuzanka Trojanová
The mechanical properties and deformation behaviour of magnesium alloys are
significantly influenced by the testing temperature, texture and grain size.
The paper gives an overview on the influence of the grain size on the mechanical properties of Mg and Mg-2Al alloys at various temperatures.
The mechanical properties and deformation behaviour of magnesium alloys are significantly influenced by the testing (service) temperature and alloying elements.
It should be mention that there are different values of ky for the same alloy subjected to different thermo-mechanical treatments.
The value of ky may be affected by the resulting textures.
The paper gives an overview on the influence of the grain size on the mechanical properties of Mg and Mg-2Al alloys at various temperatures.
The mechanical properties and deformation behaviour of magnesium alloys are significantly influenced by the testing (service) temperature and alloying elements.
It should be mention that there are different values of ky for the same alloy subjected to different thermo-mechanical treatments.
The value of ky may be affected by the resulting textures.
Online since: February 2020
Authors: Mohammed Salih Hassan, Haideer Talib Shomran, Jabbar A. Jaber
The width of the Kerf and surface roughness are the most factors which needs for focusing during cutting process for various plate cutting operation by CNC machine.
Its concluded from our result, that the characteristics of the main selecting factors which effects the laser machine performance such as, the focal lens nozzle height (0.6 to 1.0mm) and the ability and speed of cutting should be fixed and not changing.
However, heat may transfer to the material and affects adversely the cutting quality and accuracy.
Improving the properties of laser cutting can achived by several steps like cleanliness of the lens, correction of the focal path as well as the ability of high and constant cutting will gives high cleanliness without impact on the surface of the cut.
Silva, Stainless steel plate cutting: thermal and mechanical cutting.
Its concluded from our result, that the characteristics of the main selecting factors which effects the laser machine performance such as, the focal lens nozzle height (0.6 to 1.0mm) and the ability and speed of cutting should be fixed and not changing.
However, heat may transfer to the material and affects adversely the cutting quality and accuracy.
Improving the properties of laser cutting can achived by several steps like cleanliness of the lens, correction of the focal path as well as the ability of high and constant cutting will gives high cleanliness without impact on the surface of the cut.
Silva, Stainless steel plate cutting: thermal and mechanical cutting.
Online since: January 2021
Authors: Yoshikazu Nakai, Shoichi Kikuchi, Kaito Asayama, Hayata Yoshida
Fatigue strength is one of the most important mechanical property to be paid attention for long-life use of transportation system.
Average grain size and mechanical properties.
The average grain size and mechanical properties of the material is indicated in Table 2.
As shown in Fig. 7 (b), Schmid factors of grains adjacent to the crack initiation site are large, and Fig. 7 (a) indicates that the misfit of both side of crack initiation site are also large.
Ninomiya, A study on very high cycle fatigue properties of low flammability magnesium alloy in rotating bending and axial loading, Appl.
Average grain size and mechanical properties.
The average grain size and mechanical properties of the material is indicated in Table 2.
As shown in Fig. 7 (b), Schmid factors of grains adjacent to the crack initiation site are large, and Fig. 7 (a) indicates that the misfit of both side of crack initiation site are also large.
Ninomiya, A study on very high cycle fatigue properties of low flammability magnesium alloy in rotating bending and axial loading, Appl.
Online since: January 2013
Authors: Hua Zhang, Yan Hong Wang, Zhi Peng He
And in actual production, these two factors are of the organic combination of each other.
The analysis of influence factors for the end of the converter steelmaking.
For the carbon content and temperature of the molten steel of steel-making end, there many influence factors.
Tab. 1 The analysis of influence factors for steel-making end The properties of the influence factors The name of the influence factors The main influence index Main ingredient resources molten iron of Late converting Carbon content Molten steel temperature Deputy gun monitoring state Process temperature, Process carbon content Auxiliary material resources oxidant Oxygen flow, Oxygen gun position coolant Iron ore, Oxidized scale Slagging agent Dolomite, lime, mixed material Bottom blowing gas Argon gas flow Terminal forecast model for converter steelmaking based on DRNN type neural network.
[7] Fei Liu, Hua Zhang, Xiaohui Chen: Journal of mechanical engineering.
The analysis of influence factors for the end of the converter steelmaking.
For the carbon content and temperature of the molten steel of steel-making end, there many influence factors.
Tab. 1 The analysis of influence factors for steel-making end The properties of the influence factors The name of the influence factors The main influence index Main ingredient resources molten iron of Late converting Carbon content Molten steel temperature Deputy gun monitoring state Process temperature, Process carbon content Auxiliary material resources oxidant Oxygen flow, Oxygen gun position coolant Iron ore, Oxidized scale Slagging agent Dolomite, lime, mixed material Bottom blowing gas Argon gas flow Terminal forecast model for converter steelmaking based on DRNN type neural network.
[7] Fei Liu, Hua Zhang, Xiaohui Chen: Journal of mechanical engineering.
Online since: April 2010
Authors: Ali Shokuhfar, P. Movahed, A. Etaati, H. Bolvardi, H. Tavakoli, E. Omrani
Tavakoli2
1
Faculty of Mechanical Engineering, K.N.
Over the last decades, numerous investigations have been conducted on Nitinol properties.
Introduction NiTi-based shape memory alloys are technologically important materials with outstanding engineering properties including shape memory effect (SME), super elasticity and biocompatibility
These properties are sensitive to factors such as Ni content, aging, thermo-mechanical treatment, and the addition of alloying elements, the presence of impurities and chemical composition homogeneity, which affect the structure [2-4].
The property of high hardness and being a non-magnetic metal is unique to 60-NiTinol [5].
Over the last decades, numerous investigations have been conducted on Nitinol properties.
Introduction NiTi-based shape memory alloys are technologically important materials with outstanding engineering properties including shape memory effect (SME), super elasticity and biocompatibility
These properties are sensitive to factors such as Ni content, aging, thermo-mechanical treatment, and the addition of alloying elements, the presence of impurities and chemical composition homogeneity, which affect the structure [2-4].
The property of high hardness and being a non-magnetic metal is unique to 60-NiTinol [5].
Online since: October 2006
Authors: Hee Dong Kim
Introduction
The failure of the stator insulation in rotating machines is closely related to the properties of its
component materials.
These material properties are affected by exposure to a combination of thermal, electrical, mechanical and environmental stresses during operation.
Deterioration will occur in insulation that has voids created by electrical and mechanical stress.
Tip-up dissipation factor (∆tan�) is the differences between measurements at 2 kV and at 6.6 kV.
∆tan� indicates increase of dissipation factor due to applied voltage.
These material properties are affected by exposure to a combination of thermal, electrical, mechanical and environmental stresses during operation.
Deterioration will occur in insulation that has voids created by electrical and mechanical stress.
Tip-up dissipation factor (∆tan�) is the differences between measurements at 2 kV and at 6.6 kV.
∆tan� indicates increase of dissipation factor due to applied voltage.
Online since: January 2010
Authors: Bo Zhao, Hui Ma
Introduction
The physical and mechanical properties, such as high hardness and strength at elevated temperatures,
chemical stability, low friction and high wear resistance, make ceramics more attractive than other
materials for many applications.
The studies mentioned above mainly focus on fatigue behavior influenced by the cyclic frequency besides many other factors/parameters.
The study shows that the size of ZrO2 crystal grain is one of the major factors affect the t-m phase transition.
When being destroyed, it induces to t-m phase transition which leads to the improvement of mechanics properties.
The prohibition effect and the improved fatigue properties are helpful to acquire high quality surface in polishing treatment.
The studies mentioned above mainly focus on fatigue behavior influenced by the cyclic frequency besides many other factors/parameters.
The study shows that the size of ZrO2 crystal grain is one of the major factors affect the t-m phase transition.
When being destroyed, it induces to t-m phase transition which leads to the improvement of mechanics properties.
The prohibition effect and the improved fatigue properties are helpful to acquire high quality surface in polishing treatment.
Online since: December 2013
Authors: Ying Liu, Ji Liang Wang, Xiang Qian Wen, Jun Hong Shan
The physical properties of the cement are listed in Table 1.
The requirements for various properties of SCC was listed in Table 4.
It is closely related to the properties of fly ash.
At the same time, the maximum grain size, grain type, grading and other factors of coarse aggregate should be taken into account a reasonable coarse aggregate’s volume content of SCC.
(2) Effect of coarse aggregate volume content on mechanical properties of SCC It has been studied that the influence of coarse aggregate on the compressive strength of SCC when the coarse aggregate content maintains within 0.26 and 0.36.
The requirements for various properties of SCC was listed in Table 4.
It is closely related to the properties of fly ash.
At the same time, the maximum grain size, grain type, grading and other factors of coarse aggregate should be taken into account a reasonable coarse aggregate’s volume content of SCC.
(2) Effect of coarse aggregate volume content on mechanical properties of SCC It has been studied that the influence of coarse aggregate on the compressive strength of SCC when the coarse aggregate content maintains within 0.26 and 0.36.
Online since: December 2024
Authors: Yurii Otrosh, Nina Rashkevich, Olena Kuleba, Ihor Mamontov
Bridge structures are exposed to factors that can be divided into natural and human factors throughout their service life [7, 8].
Cracks can be minor or severe, affecting the structural strength of the bridge.
Soshinskiy Investigation of the Influence of the Physical Properties of Landfill Soils on the Stability of Slopes in the Context of Solving Civil Security Problems, Materials Science Forum, 1038 (2021) 407–416
State-of-the-art review of dynamic impact factors of highway bridges.
Transverse cracking of concrete bridge decks: Effects of design factors.
Cracks can be minor or severe, affecting the structural strength of the bridge.
Soshinskiy Investigation of the Influence of the Physical Properties of Landfill Soils on the Stability of Slopes in the Context of Solving Civil Security Problems, Materials Science Forum, 1038 (2021) 407–416
State-of-the-art review of dynamic impact factors of highway bridges.
Transverse cracking of concrete bridge decks: Effects of design factors.
Online since: November 2013
Authors: Nooririnah Binti Omar, Yusliza Yusuf, Muhamad Azwar Azhari, Md Ashadi Bin Md Johari
Therefore, it is inevitable to improve the wear properties of Ti-6Al-4V without detrimental the initial corrosion resistance properties even increasing it for better result.
Nevertheless, various methods of surface treatments conducted will certainly affect the corrosion resistant properties of Ti-6Al-4V, since the corrosion resistance of titanium alloys depends very much on the properties of the surface layer [3].
This method is found to increase the mechanical property such as surface hardness of the Ti-6Al-4V alloy [10].
The nature of surface modification result will affect the corrosion resistance properties of the Ti-6Al4V because the presence of microstructural defect the coating was prone to corrosion attack.
Tribological properties of titanium alloys.
Nevertheless, various methods of surface treatments conducted will certainly affect the corrosion resistant properties of Ti-6Al-4V, since the corrosion resistance of titanium alloys depends very much on the properties of the surface layer [3].
This method is found to increase the mechanical property such as surface hardness of the Ti-6Al-4V alloy [10].
The nature of surface modification result will affect the corrosion resistance properties of the Ti-6Al4V because the presence of microstructural defect the coating was prone to corrosion attack.
Tribological properties of titanium alloys.