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Online since: January 2010
Authors: Hiroyuki Kawata, Kunio Hayashi, Natsuko Sugiura, Naoki Yoshinaga, Manabu Takahashi
Martensite also affects the crystallographic
features of bainite.
There are many questions about bainite transformation and its properties that remain unanswered in spite of many intensive studies having been undertaken.
Therefore, it is important to clarify the effect of other phases on the transformation of bainite and its properties.
The mechanical properties of bainite depend on its crystallographic features.
Table 2 Effective factors on the acceleration of bainite transformation introduced by pre-existing phase.
There are many questions about bainite transformation and its properties that remain unanswered in spite of many intensive studies having been undertaken.
Therefore, it is important to clarify the effect of other phases on the transformation of bainite and its properties.
The mechanical properties of bainite depend on its crystallographic features.
Table 2 Effective factors on the acceleration of bainite transformation introduced by pre-existing phase.
Online since: November 2009
Authors: Y.Z. Guo, Q. Wei, Yu Long Li
Factors such as sample geometry and loading mode will be
critically assessed.
Mechanical properties of nanocrystalline materials.
Nano-structured vanadium: processing and mechanical properties under quasi-static and dynamic compression.
A new technique for measuring the mechanical properties of thin films.
Microscale characterization of mechanical properties.
Mechanical properties of nanocrystalline materials.
Nano-structured vanadium: processing and mechanical properties under quasi-static and dynamic compression.
A new technique for measuring the mechanical properties of thin films.
Microscale characterization of mechanical properties.
Online since: September 2017
Authors: I.R. Kuzeev, E.V. Poyarkova
When assessing structural and mechanical heterogeneities of the structural material, an important role is played by concepts of similarity of mechanical phenomena, self-similarity of deformation and destruction processes and by the scale factor of reliability, which are considered in their historical development as a part of application of fractal concepts in the materials science.
Structural state of each particular welded joint and properties of the metal of its local areas acquired during the performance of fixed joint (welding) was assessed by metallographic studies of the structure of its reference zones by scanning electron microscopy, the obtained results of which are provided in [1-4].
In the experiments considered: – Base metal (BM); – Heat-affected zone (HAZ); – Weld metal (WM).
It was noted that dimension of D0 self-similarity, which is a rough characteristic of multifractal and bears no data on its static properties, of all welded joints in all reference zones did not exceed one and was not equal to the stability threshold Dq, which means the absence of multifractal degeneration into monofractal (provided that D0 = Dq) and presence of isolated multifractal sets at different scale levels.
Bavykin, Applications of fractal analysis for assessment of the engineering surfaces quality and dynamic properties of its structure, Mechanical properties of the modern construction materials: theses of the international scientific conference, Moscow, (2012) 197-199
Structural state of each particular welded joint and properties of the metal of its local areas acquired during the performance of fixed joint (welding) was assessed by metallographic studies of the structure of its reference zones by scanning electron microscopy, the obtained results of which are provided in [1-4].
In the experiments considered: – Base metal (BM); – Heat-affected zone (HAZ); – Weld metal (WM).
It was noted that dimension of D0 self-similarity, which is a rough characteristic of multifractal and bears no data on its static properties, of all welded joints in all reference zones did not exceed one and was not equal to the stability threshold Dq, which means the absence of multifractal degeneration into monofractal (provided that D0 = Dq) and presence of isolated multifractal sets at different scale levels.
Bavykin, Applications of fractal analysis for assessment of the engineering surfaces quality and dynamic properties of its structure, Mechanical properties of the modern construction materials: theses of the international scientific conference, Moscow, (2012) 197-199
Online since: April 2015
Authors: Janusz Adamiec, Janusz Rykała
Such welded joints must be characterised by high quality and aesthetics and, last but not least, adequate mechanical properties.
The AlMg4.5MnZr electrode wire enables obtaining slightly lower joint plastic properties, yet better mechanical properties than standard 5xxx series filler metals.
Due to a number of factors affecting the quality of a welded joint, the window of welding parameters ensuring the obtainment of the quality level B according to PN-EN ISO 10042 [3] is very narrow, particularly when 4.0 mm sheets are subjected to CMT welding.
The CMT and MIG-Pulse welding methods enable making butt joints of 2.0 mm through 4.0 mm thick EN AW alloy sheets characterised by very good quality and mechanical properties.
Obtaining high quality as well as good mechanical and plastic properties of welded joints requires the precise adjustment of welding parameters.
The AlMg4.5MnZr electrode wire enables obtaining slightly lower joint plastic properties, yet better mechanical properties than standard 5xxx series filler metals.
Due to a number of factors affecting the quality of a welded joint, the window of welding parameters ensuring the obtainment of the quality level B according to PN-EN ISO 10042 [3] is very narrow, particularly when 4.0 mm sheets are subjected to CMT welding.
The CMT and MIG-Pulse welding methods enable making butt joints of 2.0 mm through 4.0 mm thick EN AW alloy sheets characterised by very good quality and mechanical properties.
Obtaining high quality as well as good mechanical and plastic properties of welded joints requires the precise adjustment of welding parameters.
Online since: July 2021
Authors: Fatih Mehmet Emen, Olena Chebotaryova, Olena Tarakhno, Olga Skorodumova, Oleg Bezuglov
Based on the generalization of research results on the processes of obtaining SiO2 sols using tetraethoxysilane and ethyl silicates, the main factors influencing the elasticity of silica coatings on cotton fabrics and their fire-retardant properties are considered.
This technology allows to create new materials with a high degree of homogeneity at the molecular level and with exceptional physical and chemical properties, which differ significantly from the properties of materials obtained by traditional methods [2].
The fire-retardant properties of the coatings were evaluated by the effect of an open flame on the impregnated fabric samples.
Malucelli, Thermal stability, flame retardancy and mechanical properties of cotton fabrics treated with inorganic coatings synthesized through sol–gel processes, Carbohydrate Polymers. 87(3) (2012) 2093–2099
Emen, Formation of fire retardant properties in elastic silica coatings for textile materials, Materials Science Forum. 1006 (2020) 25–31
This technology allows to create new materials with a high degree of homogeneity at the molecular level and with exceptional physical and chemical properties, which differ significantly from the properties of materials obtained by traditional methods [2].
The fire-retardant properties of the coatings were evaluated by the effect of an open flame on the impregnated fabric samples.
Malucelli, Thermal stability, flame retardancy and mechanical properties of cotton fabrics treated with inorganic coatings synthesized through sol–gel processes, Carbohydrate Polymers. 87(3) (2012) 2093–2099
Emen, Formation of fire retardant properties in elastic silica coatings for textile materials, Materials Science Forum. 1006 (2020) 25–31
Online since: April 2012
Authors: Jian Guang Li, Ying Xue Yao, Jin Guang Du
Processes to produce these composites and studies on their mechanical properties have gained popularity [1].
In addition, the sporting goods industry has also been in the forefront of this type of material development, capitalizing on the materials' high specific properties [2].
As is well known, processing efficiency is an important factor that affects batch production of parts.
Taguchi's DOE parameter design techniques are used to determine which of controllable factors and which noise factors are the significant variables.
The aim is to set the controllable factors at those levels that will result in a product or process being robust with respect to the noise factors.
In addition, the sporting goods industry has also been in the forefront of this type of material development, capitalizing on the materials' high specific properties [2].
As is well known, processing efficiency is an important factor that affects batch production of parts.
Taguchi's DOE parameter design techniques are used to determine which of controllable factors and which noise factors are the significant variables.
The aim is to set the controllable factors at those levels that will result in a product or process being robust with respect to the noise factors.
Online since: August 2007
Authors: Hyung Kyu Kim, Young Ho Lee
A Study on the Fretting Wear Resistance of a Zirconium Alloy with the
Variation of Supporting Spring Properties
Young-Ho Leea and Hyung-Kyu Kim
b
Korea Atomic Energy Research Institute
150 Dukjin-dong, Yuseong-gu, Daejeon, 305-353, Republic of Korea
a
leeyh@kaeri.re.kr, bhkkim1@kaeri.re.kr
Keywords: Fretting wear, Zirconium alloy, spring shape, slip amplitude, mechanism, spacer grid,
nuclear fuel rod.
From the experimental results, the fretting wear mechanisms and the effect of spring properties were discussed.
This is because its mechanism is quite complex and the many variables affecting the fretting wear phenomenon has a mutual relationship with each other.
However, this causes a change of the mechanical properties that affects the fretting wear behavior.
An accumulation of wear particles in the dry condition has beneficial effects on the wear properties due to the formation of a load-bearing layer [5] while the wear debris is rapidly removed from the contact surfaces in concurrence with it's generation under a water lubrication.
From the experimental results, the fretting wear mechanisms and the effect of spring properties were discussed.
This is because its mechanism is quite complex and the many variables affecting the fretting wear phenomenon has a mutual relationship with each other.
However, this causes a change of the mechanical properties that affects the fretting wear behavior.
An accumulation of wear particles in the dry condition has beneficial effects on the wear properties due to the formation of a load-bearing layer [5] while the wear debris is rapidly removed from the contact surfaces in concurrence with it's generation under a water lubrication.
Online since: November 2014
Authors: M.A.M. Ali, A.N.M. Khalil, Ahmad Nabil Mohd Khalil, Azwan Iskandar Azmi
Table 2 shows the rank of level of surface roughness for the four parameters that indicates how the controlled factors affect the S/N ratio.
It’s shows that nanolubricant play important role affecting the surface roughness of machined product.
For the optimal factor level combination for better surface roughness is the combination of the factors C1 A3 B3 D2.
Table 4 shows the confirmation run based on the optimal combination of factors.
Taylor, “Experimental and numerical study on the optical properties and agglomeration of nanoparticle suspensions,” J.
It’s shows that nanolubricant play important role affecting the surface roughness of machined product.
For the optimal factor level combination for better surface roughness is the combination of the factors C1 A3 B3 D2.
Table 4 shows the confirmation run based on the optimal combination of factors.
Taylor, “Experimental and numerical study on the optical properties and agglomeration of nanoparticle suspensions,” J.
Online since: January 2012
Authors: An Xin, Zhi Yu He
Analysis On Influencing Factors of Prestress Loss of Anchor Cables
Soil Properties.
Soil properties are crucial to anchor effect of anchor cables.
Analysis of factors affected on load losses of high capacity and long rock anchors[J].
Analysis of the Factors Affecting Prestress-Losing in Prestressed Cable Anchor [J].
Analysis of factors affecting pre-stressing loss in pre-stressing cable anchor and compensative measures[J].
Soil properties are crucial to anchor effect of anchor cables.
Analysis of factors affected on load losses of high capacity and long rock anchors[J].
Analysis of the Factors Affecting Prestress-Losing in Prestressed Cable Anchor [J].
Analysis of factors affecting pre-stressing loss in pre-stressing cable anchor and compensative measures[J].
Online since: May 2022
Authors: Alin Constantin Murariu, Ion Aurel Perianu, Alexandru Adrian Geana, Gabriel Socol, Gianina Florentina Popescu-Pelin
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.