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Online since: July 2018
Authors: Fu Sheng Han, Wen Wang, Dan Wang
Introduction
TWIP steels have drawn increasing attention of scientific and industrial societies in recent years due to their excellent mechanical properties particularly very high impacting energy absorption capacity generated by extremely high ductility [1-3].
The microstructures and mechanical properties were characterized for the as forged and annealed samples to understand the microstructure evolution and mechanical behavior of the samples.
Mechanical properties.
The dislocations on the grain boundaries are difficult to move and meanwhile they also impede the movement of other dislocations within the grains, leading to enhanced mechanical properties.
References [1] Grässel O, Krüger L, Frommeyer G, Meyer L W, High strength Fe-Mn-(Al, Si) TRIP/TWIP steels development - properties- application, Inter.
The microstructures and mechanical properties were characterized for the as forged and annealed samples to understand the microstructure evolution and mechanical behavior of the samples.
Mechanical properties.
The dislocations on the grain boundaries are difficult to move and meanwhile they also impede the movement of other dislocations within the grains, leading to enhanced mechanical properties.
References [1] Grässel O, Krüger L, Frommeyer G, Meyer L W, High strength Fe-Mn-(Al, Si) TRIP/TWIP steels development - properties- application, Inter.
Online since: September 2020
Authors: Muhammad Azwadi Sulaiman, Syifa' Muhamad Sharifuddin, Suziey Syamimi Sukri, Wannarat Chueangchayaphan, Fathin Asila Mohd Pabli, Mohd Shukri Mat Nor, Piyawadee Luangchuang
The properties of produced composites include scorch time, cure time, torque and dielectric properties were characterised.
Some of the crucial factors that affect the cure time are thermal instability of sulphur linkages, the formation of sulphur linkages, and the addition of fillers [11].
Generally, factors such as high moisture content, low surface area, and high metal oxide content can reduce the cure time of the compounds [13].
Nakason, Ceramic/ natural rubber composites: Influence types of rubber and ceramic materials on curing, mechanical, morphological, and dielectric properties, J.
Yusuff, Mechanical and Electrical Properties of TiO2 Loaded Vulcanized Natural Rubber, Int.
Some of the crucial factors that affect the cure time are thermal instability of sulphur linkages, the formation of sulphur linkages, and the addition of fillers [11].
Generally, factors such as high moisture content, low surface area, and high metal oxide content can reduce the cure time of the compounds [13].
Nakason, Ceramic/ natural rubber composites: Influence types of rubber and ceramic materials on curing, mechanical, morphological, and dielectric properties, J.
Yusuff, Mechanical and Electrical Properties of TiO2 Loaded Vulcanized Natural Rubber, Int.
Online since: December 2016
Authors: A. Shanmugasundaram, Soundiah Ilangovan, Sanjivi Arul
It is understand that COF value may be depends on the other factors such as surface roughness, alloy composition and temperature of the specimen.
It is seen from the figure that the COF do not get affected with increase in the sliding velocity since as stated above the COF value depends on the other factors such as surface roughness, alloy composition and temperature of the specimen.
Pürçek, Effect of copper content on the mechanical and sliding wear properties of monotectoid-based zinc-aluminium-copper alloys.
Savaşkan, Mechanical and tribological properties of Al–40Zn–Cu alloys.
Savaşkan, Mechanical and tribological properties of Al–40Zn–Cu alloys, Tribology international, 42 (1), (2009), 176
It is seen from the figure that the COF do not get affected with increase in the sliding velocity since as stated above the COF value depends on the other factors such as surface roughness, alloy composition and temperature of the specimen.
Pürçek, Effect of copper content on the mechanical and sliding wear properties of monotectoid-based zinc-aluminium-copper alloys.
Savaşkan, Mechanical and tribological properties of Al–40Zn–Cu alloys.
Savaşkan, Mechanical and tribological properties of Al–40Zn–Cu alloys, Tribology international, 42 (1), (2009), 176
Online since: October 2016
Authors: Andrea Ghiotti, Stefania Bruschi, Enrico Simonetto, Giulia Venturato
Fig. 3: Plots of the mechanical properties obtained from the tensile tests. a) Elastic modulus vs temperature; b) ultimate tensile strength vs temperature; c) percent elongation vs temperature.
All these factors contribute to improve the formability of the material, making it suitable to be manufactured in high temperature bending processes.
It has been proven that the combination time-temperature involved in the draw bending process arenot enough severe to modify substantially the microstructure, so demonstrating that tube draw bending does not affect the mechanical properties of the material.
Es-Said, Effect of heat treatments on the mechanical properties of Ti-3Al-2.5V alloy, J.
Codings, Materials Properties Handbook: Titanium Alloys, ASM International, 1994.
All these factors contribute to improve the formability of the material, making it suitable to be manufactured in high temperature bending processes.
It has been proven that the combination time-temperature involved in the draw bending process arenot enough severe to modify substantially the microstructure, so demonstrating that tube draw bending does not affect the mechanical properties of the material.
Es-Said, Effect of heat treatments on the mechanical properties of Ti-3Al-2.5V alloy, J.
Codings, Materials Properties Handbook: Titanium Alloys, ASM International, 1994.
Online since: August 2013
Authors: Zhong Yuan Li
The process mentioned is not simply caused by the mechanical factors while it must be joint consequences of mechanical, biological and chemical actions.
Environmental Influences on Concrete Structures Except concrete material properties, environmental factors become one of the main factors affecting the cause of the deterioration of the performance of concrete structures.
Self-factors affecting the degree of concrete carbonation includes the concrete component and mixture ratio, construction process factors: conservation methods and age.
Chloride diffusion coefficient reflects the indicators of concrete durability, affected by the number and characteristics of the internal pore structure and partially affected by the temperature and other environmental factors.
The Development Process of Steel Corrosion When reinforcing steel bar rusts, rust development mode, the rust speed and its mechanical impact on surrounded concrete become the essential factors affecting the durability of structure.
Environmental Influences on Concrete Structures Except concrete material properties, environmental factors become one of the main factors affecting the cause of the deterioration of the performance of concrete structures.
Self-factors affecting the degree of concrete carbonation includes the concrete component and mixture ratio, construction process factors: conservation methods and age.
Chloride diffusion coefficient reflects the indicators of concrete durability, affected by the number and characteristics of the internal pore structure and partially affected by the temperature and other environmental factors.
The Development Process of Steel Corrosion When reinforcing steel bar rusts, rust development mode, the rust speed and its mechanical impact on surrounded concrete become the essential factors affecting the durability of structure.
Online since: November 2007
Authors: Bo Zhao, Chuan Shao Liu, Qing Hua Kong, Guo Fu Gao
Based on the machining pattern, mechanics of material removal and theory of
micro-indentation, in previous studies the models of material removal rate of hard-brittle materials
was discussed through the relatively influencing factors of machining parameters from various
aspects, reflecting the research advances on mechanics of material removal of hard-brittle materials.
The material removal rate is affected not only by the properties of material and machining parameters, but also by the character of grinding wheel and parameters of ultrasonic vibration.
Introduction As a kind of advanced engineering materials, complex ceramics are promising materials for a large number of high-technology engineering applications due to their excellent properties, including high strength at elevated temperature, low thermal expansion, good wear resistance, chemical inertness and so on[1].
Therefore, the critical ductile depth of cut for ceramic machining can be modified as ( ) 2 IC c 1 2 3 4 v v , , , KE d f H H ξ ξ ξ ξ = (11) where f(.) is a weight function of different factors, ξ1 is the material coefficient, ξ2 is the coefficient of machining method, ξ3 is the material coefficient of cutting conditions, ξ4 is the material coefficient of wheel topography.
The material removal rate is affected not only by the properties of material and machining parameters, but also by the character of grinding wheel and parameters of ultrasonic vibration.
The material removal rate is affected not only by the properties of material and machining parameters, but also by the character of grinding wheel and parameters of ultrasonic vibration.
Introduction As a kind of advanced engineering materials, complex ceramics are promising materials for a large number of high-technology engineering applications due to their excellent properties, including high strength at elevated temperature, low thermal expansion, good wear resistance, chemical inertness and so on[1].
Therefore, the critical ductile depth of cut for ceramic machining can be modified as ( ) 2 IC c 1 2 3 4 v v , , , KE d f H H ξ ξ ξ ξ = (11) where f(.) is a weight function of different factors, ξ1 is the material coefficient, ξ2 is the coefficient of machining method, ξ3 is the material coefficient of cutting conditions, ξ4 is the material coefficient of wheel topography.
The material removal rate is affected not only by the properties of material and machining parameters, but also by the character of grinding wheel and parameters of ultrasonic vibration.
Online since: March 2015
Authors: Ning Wang, Chun Sheng Li, Chuan Yun Xu
Recently, researchers draw more attention to basalt fiber due to its excellent mechanical properties, good thermal stability, and relatively low cost [4-6].
Some papers dealt with the introduction of basalt fiber for improving asphalt [7-8], while the detailed rheological properties and the regression relation between temperature and rutting factor are still poorly understood.
In this paper,we tested the rheological properties of asphalt mortar with different ratio of basalt fiber.
Results and discussion The rutting resistance properties of asphalt mortar were obtained by DSR testing.
It clan also be seen that the rutting factors rapidly decreases with the constant rise of the temperature in Fig. 4.
Some papers dealt with the introduction of basalt fiber for improving asphalt [7-8], while the detailed rheological properties and the regression relation between temperature and rutting factor are still poorly understood.
In this paper,we tested the rheological properties of asphalt mortar with different ratio of basalt fiber.
Results and discussion The rutting resistance properties of asphalt mortar were obtained by DSR testing.
It clan also be seen that the rutting factors rapidly decreases with the constant rise of the temperature in Fig. 4.
Online since: September 2011
Authors: Xin Ping Li, Wei Shen Zhu, Da Jun Yu, Yun Hua Guo
Unloaded fracture zones (XL316-1 and XL9-15) and faults f231, f208 revealed are the major factors affecting the overall stability of the right bank slope.
The engineering geology problems are following: (1) The physical and mechanical properties of rock (mass) are significantly lower. (2) The granite at the abutments is intercalated by week diabase dykes. (3) Fractures are developed in the granite at the abutments.
The macroscopic properties are then derived from the mesoscopic behaviours by volume averaging. (4) The fracture network simulation method.
The ratio between the corresponding gravitational acceleration G and the real gravitational acceleration is defined as the factor of safety of the slope.The safety factor is reached as 1.24 and plastic zones computed by the model is showing as Figure 5.
Based on the laboratory experiments on mechanical properties of rock blocks and field tests on single fracture plane, the mechanical parameters are transformed into the mechanical parameters of rock masses by stochastic mechanical analysis of the characteristic element in rock masses.
The engineering geology problems are following: (1) The physical and mechanical properties of rock (mass) are significantly lower. (2) The granite at the abutments is intercalated by week diabase dykes. (3) Fractures are developed in the granite at the abutments.
The macroscopic properties are then derived from the mesoscopic behaviours by volume averaging. (4) The fracture network simulation method.
The ratio between the corresponding gravitational acceleration G and the real gravitational acceleration is defined as the factor of safety of the slope.The safety factor is reached as 1.24 and plastic zones computed by the model is showing as Figure 5.
Based on the laboratory experiments on mechanical properties of rock blocks and field tests on single fracture plane, the mechanical parameters are transformed into the mechanical parameters of rock masses by stochastic mechanical analysis of the characteristic element in rock masses.
Online since: November 2011
Authors: P. K. Rakesh, D. Kumar, Inderdeep Singh
The polymer matrix composites (PMCs) are increasingly being used in structural applications owing to their superior mechanical properties.
It has been found that the drilling parameters significantly affect the compressive behaviour of laminates with drilled holes.
Drilling induced damage drastically affects the residual tensile strength of the drilled composite laminates.
There are reported studies focussing on the effect of notches and holes on different mechanical properties of composite structures with holes, but there are no clarifications for hole making technique [7-9].
The results are important for designers of composite structures as structural designers should take into consideration the drilling induced damage in laminates with hole and suggest appropriate factor of safety to account for the reduction in mechanical properties after the drilling process.
It has been found that the drilling parameters significantly affect the compressive behaviour of laminates with drilled holes.
Drilling induced damage drastically affects the residual tensile strength of the drilled composite laminates.
There are reported studies focussing on the effect of notches and holes on different mechanical properties of composite structures with holes, but there are no clarifications for hole making technique [7-9].
The results are important for designers of composite structures as structural designers should take into consideration the drilling induced damage in laminates with hole and suggest appropriate factor of safety to account for the reduction in mechanical properties after the drilling process.
Online since: October 2014
Authors: Wolfgang Tillmann, Jan Pfeiffer, L. Wojarski
Influencing Factors on the reactive wetting of Cu-Sn-Ti- and Ag-Cu-Ti-alloys on Silicon Carbide – microstructural observations, effects and multivariate modelling
W.
Despite the fact that active brazing is a suitable and well-established method to join ceramics to each other and to metals, issues concerning possible influences on the wetting properties of the used filler alloys are not yet entirely clarified.
In order to evaluate the effects of the considered factors as well as their interdependencies, a multivariate statistical approach is employed and a linear regression model for both, the contact angle and the spreading area, will be derived.
Hence, several research groups have investigated the magnitude of the influencing factors.
Besides this observation, no considerable changes of the values of the wetting properties can be measured.
Despite the fact that active brazing is a suitable and well-established method to join ceramics to each other and to metals, issues concerning possible influences on the wetting properties of the used filler alloys are not yet entirely clarified.
In order to evaluate the effects of the considered factors as well as their interdependencies, a multivariate statistical approach is employed and a linear regression model for both, the contact angle and the spreading area, will be derived.
Hence, several research groups have investigated the magnitude of the influencing factors.
Besides this observation, no considerable changes of the values of the wetting properties can be measured.