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Online since: November 2005
Authors: L. Pentti Karjalainen, P.P. Suikkanen, Jukka Kömi
Microstructures of these steels are often complex, consisting of
mixtures of different ferrite morphologies, and therefore, wide combinations of mechanical
properties can be achieved by controlling them [2].
In addition to adjusted composition, a desired balance of mechanical properties can be achieved by properly designed thermo-mechanical control processing (TMCP) including controlled rolling followed by accelerated cooling [3].
In the case of Mo-Nb microalloyed steels, RCR has been reported to lead even to better strength properties than the conventional TMCP route [4].
A regression equation obtained for the impact toughness was as follows Eq. 2: CV [J] = -1486C + 535Nb + ∆T + 65, R2 = 0.77 (2) where C and Nb are in wt-% and ∆T is the temperature difference between Tnr and the temperature of the last pass in °C In consistent with the physical simulation tests, C was found to be the most significant factor to control the microstructures and consequently also the mechanical properties of the investigated steels.
The hardness (i.e. strength) properties are relatively insensitive to retained deformation below Tnr, but a refinement in the grain size is obtained.
In addition to adjusted composition, a desired balance of mechanical properties can be achieved by properly designed thermo-mechanical control processing (TMCP) including controlled rolling followed by accelerated cooling [3].
In the case of Mo-Nb microalloyed steels, RCR has been reported to lead even to better strength properties than the conventional TMCP route [4].
A regression equation obtained for the impact toughness was as follows Eq. 2: CV [J] = -1486C + 535Nb + ∆T + 65, R2 = 0.77 (2) where C and Nb are in wt-% and ∆T is the temperature difference between Tnr and the temperature of the last pass in °C In consistent with the physical simulation tests, C was found to be the most significant factor to control the microstructures and consequently also the mechanical properties of the investigated steels.
The hardness (i.e. strength) properties are relatively insensitive to retained deformation below Tnr, but a refinement in the grain size is obtained.
Online since: May 2014
Authors: Rustam Kaibyshev, Andrii Dubyna, Anna Mogucheva
Kaibyshev1,c
1Belgorod State University, Pobeda 85, Belgorod 308015, Russia
adubyna@bsu.edu.ru, bmogucheva@bsu.edu.ru, crustam_kaibyshev@bsu.edu.ru
Keywords: aluminum alloys, equal channel angular pressing, mechanical properties, ultrafine grained microstructure
Abstract.
Effect of extensive grain refinement on mechanical properties of an Al-Mg-Sc alloy subjected to equal-channel angular pressing (ECAP) at 300°C is considered in detail.
Fig.5 Engineering σ~ε curves aluminium alloy 1570 after ECAP Mechanical properties.
The change in serration type has a minor effect on ductility, and, therefore, manifestation of PLC effect is insignificantly important for mechanical properties of the 1570Al subjected to ECAP.
Court, Influence of grain size on tensile properties of Al-Mg alloys, Mater Sci Tech 19 (2003) 1349-1354
Effect of extensive grain refinement on mechanical properties of an Al-Mg-Sc alloy subjected to equal-channel angular pressing (ECAP) at 300°C is considered in detail.
Fig.5 Engineering σ~ε curves aluminium alloy 1570 after ECAP Mechanical properties.
The change in serration type has a minor effect on ductility, and, therefore, manifestation of PLC effect is insignificantly important for mechanical properties of the 1570Al subjected to ECAP.
Court, Influence of grain size on tensile properties of Al-Mg alloys, Mater Sci Tech 19 (2003) 1349-1354
Online since: March 2004
Authors: X.S. Han, S.Y. Yu, S.X. Wang
Yu
School of Mechanical Engineering, Tianjin University, Tianjin, 300072, China
Keywords: Molecular dynamics, Nanometric grinding, Crystal anisotropy
Abstract.
In modern manufacturing, the quality and property of the product both depend on the precision engineering which is the key factor of advanced processing technology.
The precision of the nanometric manufacturing is affected by many factors such as the precision of the machine tool, the quality of the diamond tool, the properties of the work materials and so on.
Because the first two factors play an important role in acquiring high quality machined surfaces, people have paid more attention to the development of the ultraprecision machine tools and diamond tools.
Because many single crystal materials are anisotropic in their physical and mechanical properties, it is valuable to investigate their behavior in nanometric manufacturing such as cutting force, the mechanism of chip formation, and the integrity of the machined surfaces as well.
In modern manufacturing, the quality and property of the product both depend on the precision engineering which is the key factor of advanced processing technology.
The precision of the nanometric manufacturing is affected by many factors such as the precision of the machine tool, the quality of the diamond tool, the properties of the work materials and so on.
Because the first two factors play an important role in acquiring high quality machined surfaces, people have paid more attention to the development of the ultraprecision machine tools and diamond tools.
Because many single crystal materials are anisotropic in their physical and mechanical properties, it is valuable to investigate their behavior in nanometric manufacturing such as cutting force, the mechanism of chip formation, and the integrity of the machined surfaces as well.
Online since: March 2015
Authors: Li Min Jia, Xiao Huan Shen, Jun Wei Dong, Fan Yong Meng
The affecting factors are shown in table1.
For naked grating, is determined by the fiber properties.
After encapsulation, is determined by the substrate material properties.
is decided by the substrate material properties.
In addition to test accurately and use appropriate temperature compensation algorithm, temperature uniformity is another important factor affecting the temperature compensation effect.
For naked grating, is determined by the fiber properties.
After encapsulation, is determined by the substrate material properties.
is decided by the substrate material properties.
In addition to test accurately and use appropriate temperature compensation algorithm, temperature uniformity is another important factor affecting the temperature compensation effect.
Online since: September 2021
Authors: Laetitia Cook, Cameron Wantenaar, Bronwyn Wise
At this level the properties of matter are manipulated and severely affected with potentially significant benefits to the construction industry.
These factors were further assessed through online interviews with knowledgeable professionals in construction and associated nanomaterials.
On a nanoscale, the material’s properties are manipulated by quantum physics.
This causes densification of the micro and nano structure resulting in improved mechanical properties (Saurav.S., 2012).
It has been found that a 1% weight of CNT’s can improve the mechanical properties of the concrete structure by allowing concrete to be impenetrable to salts and water, further enhancing the concrete’s durability.
These factors were further assessed through online interviews with knowledgeable professionals in construction and associated nanomaterials.
On a nanoscale, the material’s properties are manipulated by quantum physics.
This causes densification of the micro and nano structure resulting in improved mechanical properties (Saurav.S., 2012).
It has been found that a 1% weight of CNT’s can improve the mechanical properties of the concrete structure by allowing concrete to be impenetrable to salts and water, further enhancing the concrete’s durability.
Online since: October 2012
Authors: Xia Chen, Hua Quan Yang, Jian Jun Yan
Results and Discussions
Mechanical property: Compressive and splitting tensile strength of concretes was listed respectively in table 3.
It was presumed that some reaction between limestone and cement matrix, might have taken place as revealed in Reference [9] that limestone surface was dissolved and C4AHn·1/2CO2 was produced on ITZ, resulted in micro structure alteration of ITZ, pore structure and hydration products phase in particular, and directly affect mechanical and deformation properties of concrete as displayed in table 4.
Micro structure analysis disclosed that superficial features and chemical activity of aggregates were the primary factors that influenced ITZ structure and concrete performances.
Mechanics characteristics of concrete affected by grain group of aggregate[J].
Thermal properties [R].
It was presumed that some reaction between limestone and cement matrix, might have taken place as revealed in Reference [9] that limestone surface was dissolved and C4AHn·1/2CO2 was produced on ITZ, resulted in micro structure alteration of ITZ, pore structure and hydration products phase in particular, and directly affect mechanical and deformation properties of concrete as displayed in table 4.
Micro structure analysis disclosed that superficial features and chemical activity of aggregates were the primary factors that influenced ITZ structure and concrete performances.
Mechanics characteristics of concrete affected by grain group of aggregate[J].
Thermal properties [R].
Online since: May 2022
Authors: Alin Constantin Murariu, Ion Aurel Perianu, Gabriel Socol, Gianina Florentina Popescu-Pelin, Alexandru Adrian Geana
Oxidation is one of the main degradation mechanisms that affects most industrial components.
Generally, the steels used in these applications have physical, mechanical and chemical properties that give them corrosion resistance.
Introduction The evolution of corrosion pits affecting stainless steels submerged in chloride solutions occurs in three stages, each one being distinctly different from the other two: nucleation, metastable growth and stable growth. [1] Once a pit has started nucleating, its expansion is maintained by the presence of a highly aggressive anolyte inside the pit.
The chosen material for substrates is the W1.4043 (X46Cr13) because of its good corrosion resistance. [7-8] Table 1: Chemical composition of W1.4034 [%] [9] Grade C Si Mn P S Cr X46Cr13 0.43 – 0.5 Max 1 Max 1 Max 0.04 Max 0.015 12.5 - 14.5 Table 2: Mechanical properties of heat treated W1.4034 [9] Grade 0,2 %-proof strength Rp0,2 [MPa] Tensile strength Rm [MPa] Elongation after fracture A [%] Impact energy KV [J] Hardness [HB] 1.4034 650 850 to 1000 10 12 245 Table 3: Corrosion Resistance of W1.4034 Pitting corrosion resistance Crevice corrosion resistance PRE CPT CCT 13 <10 <0 PRE or Pitting Resistant Equivalent can be calculated using the formula: PRE = %Cr + 3.3 x %Mo + 16 x %N CPT or Corrosion Pitting Temperature is measured in the Avesta Cell (standard ASTM G 150), in a 1M NaCl solution.
Chrisey, "The effect of the matrix on film properties in matrix-assisted pulsed laser evaporation", Journal of Applied Physics 91, 2055-2058 (2002) https://doi.org/10.1063/1.1427138 [14] A.
Generally, the steels used in these applications have physical, mechanical and chemical properties that give them corrosion resistance.
Introduction The evolution of corrosion pits affecting stainless steels submerged in chloride solutions occurs in three stages, each one being distinctly different from the other two: nucleation, metastable growth and stable growth. [1] Once a pit has started nucleating, its expansion is maintained by the presence of a highly aggressive anolyte inside the pit.
The chosen material for substrates is the W1.4043 (X46Cr13) because of its good corrosion resistance. [7-8] Table 1: Chemical composition of W1.4034 [%] [9] Grade C Si Mn P S Cr X46Cr13 0.43 – 0.5 Max 1 Max 1 Max 0.04 Max 0.015 12.5 - 14.5 Table 2: Mechanical properties of heat treated W1.4034 [9] Grade 0,2 %-proof strength Rp0,2 [MPa] Tensile strength Rm [MPa] Elongation after fracture A [%] Impact energy KV [J] Hardness [HB] 1.4034 650 850 to 1000 10 12 245 Table 3: Corrosion Resistance of W1.4034 Pitting corrosion resistance Crevice corrosion resistance PRE CPT CCT 13 <10 <0 PRE or Pitting Resistant Equivalent can be calculated using the formula: PRE = %Cr + 3.3 x %Mo + 16 x %N CPT or Corrosion Pitting Temperature is measured in the Avesta Cell (standard ASTM G 150), in a 1M NaCl solution.
Chrisey, "The effect of the matrix on film properties in matrix-assisted pulsed laser evaporation", Journal of Applied Physics 91, 2055-2058 (2002) https://doi.org/10.1063/1.1427138 [14] A.
Online since: May 2011
Authors: Wen Huang, Yong Xia, Xiao Qing Zhou
It is found that the shapes of the coarse aggregates do affect the tensile strength and failure pattern.
However, as is well known, the mechanical behavior of concrete is rather complicated, especially when it is under high strain rate.
In numerical simulation, concrete material is generally described as a homogeneous material with homogenized material properties derived from standard concrete sample tests[3].
However, concrete is a complex material, consisting of aggregates bounded by cement past, which makes the mechanical behavior of concrete rather complicated.
The reason is that different material properties of the three phases inside the concrete specimen affect the stress wave transportation.
However, as is well known, the mechanical behavior of concrete is rather complicated, especially when it is under high strain rate.
In numerical simulation, concrete material is generally described as a homogeneous material with homogenized material properties derived from standard concrete sample tests[3].
However, concrete is a complex material, consisting of aggregates bounded by cement past, which makes the mechanical behavior of concrete rather complicated.
The reason is that different material properties of the three phases inside the concrete specimen affect the stress wave transportation.
Online since: August 2009
Authors: Ku En Ting, Jung Sheng Chen, Hui Ching Wang
Diamond-like carbon (DLC) films have attracted great interest due to their outstanding
mechanical, biocompatibility, thermal, optical and electrical properties.
The nanoindentation is an excellent method for measuring nanomechanical properties of both bulk and thin films.
Such excellent properties of DLC films suggest many practical applications immediately [5].
The levels for four factors are listed in Table 1.
Xi and Xj are the process parameters or factors.
The nanoindentation is an excellent method for measuring nanomechanical properties of both bulk and thin films.
Such excellent properties of DLC films suggest many practical applications immediately [5].
The levels for four factors are listed in Table 1.
Xi and Xj are the process parameters or factors.
Online since: May 2025
Authors: Kolos Molnár, Kardo Khalid Abdullah
These findings indicate that controlled laminar airflow with adjustable slit angles substantially improves the properties of electrospun fiber mats.
These factors are typically categorized into ambient parameters [21-23], process parameters [24, 25], and solution parameters [26, 27].
The molecular weight and concentration of the polymer are key factors affecting the entanglement state [29].
These findings suggest that controlled airflow can help improve fiber properties, especially uniformity and defect reduction.
Mondesert, Anisotropic PCL electrospun scaffolds for soft tissue engineering: Elaboration, morphological and mechanical properties, Université Grenoble Alpes [2020-....], 2020
These factors are typically categorized into ambient parameters [21-23], process parameters [24, 25], and solution parameters [26, 27].
The molecular weight and concentration of the polymer are key factors affecting the entanglement state [29].
These findings suggest that controlled airflow can help improve fiber properties, especially uniformity and defect reduction.
Mondesert, Anisotropic PCL electrospun scaffolds for soft tissue engineering: Elaboration, morphological and mechanical properties, Université Grenoble Alpes [2020-....], 2020