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Online since: March 2008
Authors: Pavel Strunz, Petr Lukáš, Vadim Davydov, Radomír Kužel
Introduction
Neutron diffraction peak profile analysis is a powerful tool for characterization of macro- and
microstructural parameters in the study of crystalline materials due to the deep penetration depth of
thermal neutrons.
The real structure of plastically deformed crystalline materials has been described using the various methods for the interpretation of broadened diffraction lines.
The Gaussian function is used for characterization of microstrain in crystalline materials whereas the size contribution is related to the Lorentzian function [8,9].
Neov: Journal of Neutron Research, 9 (2001) 79-86
Mikula: Journal of Neutron Research, 9 (2001) 415-421
The real structure of plastically deformed crystalline materials has been described using the various methods for the interpretation of broadened diffraction lines.
The Gaussian function is used for characterization of microstrain in crystalline materials whereas the size contribution is related to the Lorentzian function [8,9].
Neov: Journal of Neutron Research, 9 (2001) 79-86
Mikula: Journal of Neutron Research, 9 (2001) 415-421
Online since: July 2017
Authors: Christoph Kralovec, Martin Schagerl
This is particularly of importance for the application
of modern high-performance composite materials for safety relevant structures.
Nevertheless, modern high-performance composite materials are increasingly used in many different industries.
The structural damping coefficient (for detailed information see [9]) is set to s = 0.01 for all materials.
However, science is still at the beginning regarding a reliable prediction of the structural condition based on its E/M impedance [4].
Giurgiutiu, Electro-mechanical impadance method for crack detection in thin plates, Journal of Intelligent Materials and Structures (2016) pp. 709-718
Nevertheless, modern high-performance composite materials are increasingly used in many different industries.
The structural damping coefficient (for detailed information see [9]) is set to s = 0.01 for all materials.
However, science is still at the beginning regarding a reliable prediction of the structural condition based on its E/M impedance [4].
Giurgiutiu, Electro-mechanical impadance method for crack detection in thin plates, Journal of Intelligent Materials and Structures (2016) pp. 709-718
Online since: January 2013
Authors: Chang Ping Chen, Fu Qiang He, Li Hong, Xian Qi Zhou
Experimental programs
Raw materials.One type of P.O 42.5 cement was used for experiments, whose properties accord with Common Portland cement (GB175-2007) [3].
Concrete: Microstructure, Properties, and Materials[M], McGraw-Hill Company, 2005
[7] Shaocheng Ji, A generalized mixture rule for estimating the viscosity of solid-liquid suspensions and mechanical properties of polyphase rocks and composite materials[J].
JOURNAL OF GEOPHYSICAL RESEARCH, 2004, 109:1-18
[8] Liu Shuhua, Leng Faguang,Recycled concrete technology[M], Bejing: Bejing building materials industry press, 2007
Concrete: Microstructure, Properties, and Materials[M], McGraw-Hill Company, 2005
[7] Shaocheng Ji, A generalized mixture rule for estimating the viscosity of solid-liquid suspensions and mechanical properties of polyphase rocks and composite materials[J].
JOURNAL OF GEOPHYSICAL RESEARCH, 2004, 109:1-18
[8] Liu Shuhua, Leng Faguang,Recycled concrete technology[M], Bejing: Bejing building materials industry press, 2007
Online since: November 2005
Authors: Chun An Tang, Shan Yong Wang, K.C. Lam, S.K. Au
Most of the rocks are heterogeneous material with
various types of discontinuities in all scales such as joints, micro cracks, pores.
Numerical model The Rock Failure Process Analysis (RFPA) system, developed by CRISR [3], is a finite element tool for handling the progressive failure of heterogeneous and permeable materials.
Material with higher m values represents more homogeneous material and lower m values indicate that the materials are more heterogeneous.
The investigation in this section is based on the fact that rock is a naturally formed material and is generally heterogeneous.
Feng: Coupling Analysis of Seepage and Stress in Rock Failure Process, Chinese Journal of Geotechnical Engineering 23 (4) (2001), pp. 489-493 [6] S.P.
Numerical model The Rock Failure Process Analysis (RFPA) system, developed by CRISR [3], is a finite element tool for handling the progressive failure of heterogeneous and permeable materials.
Material with higher m values represents more homogeneous material and lower m values indicate that the materials are more heterogeneous.
The investigation in this section is based on the fact that rock is a naturally formed material and is generally heterogeneous.
Feng: Coupling Analysis of Seepage and Stress in Rock Failure Process, Chinese Journal of Geotechnical Engineering 23 (4) (2001), pp. 489-493 [6] S.P.
Online since: February 2014
Authors: Pei Gang Li, Lars Erik Svensson, Nicolaie Markocsan
The chemical composition of the materials is given in Table 1.
Table 1 Chemical composition of materials –[wt%] C Si Mn P S Al Nb V Ti S355 MC < 0.10 < 0.03 < 1.50 < .025 < .010 > .015 < .09 < .20 < .15 G3Si1 φ 1.2 0.06-0.14 0.70-1.00 1.30-1.60 < .025 < .025 /n.a.
Due to the severe turbulence of the molten droplet, the Mn-Si oxides can be involved in the molten materials.
[7] O.Grong, N.Christensen: Scandinavian Journal of Metallurgy Vol.12 (1983) p.155-165
-E.Svensson, N.Markocsan: Science and Technology of Welding & Joining, Vol. 17 (2012) p.643-648.
Table 1 Chemical composition of materials –[wt%] C Si Mn P S Al Nb V Ti S355 MC < 0.10 < 0.03 < 1.50 < .025 < .010 > .015 < .09 < .20 < .15 G3Si1 φ 1.2 0.06-0.14 0.70-1.00 1.30-1.60 < .025 < .025 /n.a.
Due to the severe turbulence of the molten droplet, the Mn-Si oxides can be involved in the molten materials.
[7] O.Grong, N.Christensen: Scandinavian Journal of Metallurgy Vol.12 (1983) p.155-165
-E.Svensson, N.Markocsan: Science and Technology of Welding & Joining, Vol. 17 (2012) p.643-648.
Online since: April 2013
Authors: Johann Plank, Thomas Pavlitschek, Markus Gretz
Introduction
The enhancement of cement-based building materials such as e.g. mortar or concrete by addition of superplasticizers and latex dispersions is well known.
Such latex-treated materials are known as polymer concrete or mortar.
Materials and Methods Preparation of core templates.
B.: Polymer-modified concrete: Review, Journal Of Materials In Civil Engineering 9 (2) (1997) 85-92
[7] Bertrand, P.; Jonas, A.; Laschewsky, A.; Legras, R.: Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties, Macromol.
Such latex-treated materials are known as polymer concrete or mortar.
Materials and Methods Preparation of core templates.
B.: Polymer-modified concrete: Review, Journal Of Materials In Civil Engineering 9 (2) (1997) 85-92
[7] Bertrand, P.; Jonas, A.; Laschewsky, A.; Legras, R.: Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties, Macromol.
Online since: March 2022
Authors: Ying Yang, Hua Wang, Zhe Zhang, Wen Bo Ji, Yu Bo Wang, Tao Zhang, Tian Zi Lin
It is possible to study and analyze the corrosion behavior and corrosion mechanism of materials in the atmosphere in a relatively short period of time by simulating and accelerating the test conditions of corrosion in the atmosphere, and to determine the corrosion performance of the materials.
Mechanical properties of welded joints under different welding processes of tested steel Welding method Tensile test Impact test Bending test Sampling location Rm/MPa A/% Break location Sampling location Kv2 (-20℃)/J 180° GMAW 35KJ/cm Welded joint 589 32 Base material Weld 145 D=2a HAZ 308 Fusion line 292 SAW 50KJ/cm 595 31 Base material Weld 112 D=2a HAZ 291 Fusion line 288 SMAW 25KJ/cm 602 28 Base material Weld 103 D=2a HAZ 318 Fusion line 320 6 Engineering Applications At present, weathering steel has been widely used in domestic bridges, railway vehicles, petrochemical industries and other industries.
Steel materials for structures in a new ironmongery era.
Journal of mate-rials in civil engineering.1 (2003) 2-24
Corrosion Science. 83(6) (2014) 6-31.
Mechanical properties of welded joints under different welding processes of tested steel Welding method Tensile test Impact test Bending test Sampling location Rm/MPa A/% Break location Sampling location Kv2 (-20℃)/J 180° GMAW 35KJ/cm Welded joint 589 32 Base material Weld 145 D=2a HAZ 308 Fusion line 292 SAW 50KJ/cm 595 31 Base material Weld 112 D=2a HAZ 291 Fusion line 288 SMAW 25KJ/cm 602 28 Base material Weld 103 D=2a HAZ 318 Fusion line 320 6 Engineering Applications At present, weathering steel has been widely used in domestic bridges, railway vehicles, petrochemical industries and other industries.
Steel materials for structures in a new ironmongery era.
Journal of mate-rials in civil engineering.1 (2003) 2-24
Corrosion Science. 83(6) (2014) 6-31.
Online since: January 2025
Authors: Brahim Belkessa, Naima Ouali, Mohamed Trari, Ramdhane Kouba, Billel Cheniti, Bouzid Maamache
BOX 64, Cheraga 16014 Algiers Algeria.
2University of Science and Technology Houari Boumediene, 16111 Alger, Algeria.
Super duplex stainless steels (SDSSs), characterized by their dual-phase ferrite-austenite microstructure, have garnered significant attention as structural materials in various industrial applications.
Materials and Experimental Procedures Super duplex stainless steel 2507 (25% Cr, 7% Ni, 4% Mo, 0.2% N, balance Fe) was used for this study.
These insights contribute to the development of more resilient materials for industrial applications, particularly in sectors where corrosion resistance is critical.
Cheniti, Brahim Belkessa, Karima Tahar-chaouch, and Ramdhane Kouba, Effect of Aging Temperature on the Microstructure, Local Mechanical Properties, and Wear Behavior of a UNS S32750 Super Duplex Stainless Steel, Journal of Materials Engineering and Performance, Volume 30, pages 546–555, (2021)
Super duplex stainless steels (SDSSs), characterized by their dual-phase ferrite-austenite microstructure, have garnered significant attention as structural materials in various industrial applications.
Materials and Experimental Procedures Super duplex stainless steel 2507 (25% Cr, 7% Ni, 4% Mo, 0.2% N, balance Fe) was used for this study.
These insights contribute to the development of more resilient materials for industrial applications, particularly in sectors where corrosion resistance is critical.
Cheniti, Brahim Belkessa, Karima Tahar-chaouch, and Ramdhane Kouba, Effect of Aging Temperature on the Microstructure, Local Mechanical Properties, and Wear Behavior of a UNS S32750 Super Duplex Stainless Steel, Journal of Materials Engineering and Performance, Volume 30, pages 546–555, (2021)
Online since: October 2015
Authors: Julia Hricova
In metal machining there is an expressive effort to eliminate roughing operations, heat treatment of work piece materials, as well as finishing operations such as grinding or honing.
The effect of selected cutting parameters such as cutting speed, feed rate, depth of cut, and tool geometry on cutting forces different materials by various types of cutting tools were published in [4, 5, 10-14].
Blocks with dimensions of 60 × 20 × 100 mm were used as work piece materials.
Michal et al, Mathematical Modelling and Optimization of Technological Process Using Design of Experiments Methodology, Applied Mechanics and Materials 616 (2014) 61-68
Neslušan, Force load of cutting tool by turning of nickel alloy Inconel 718 with sintered carbide insert, Applied Mechanics and Materials 409-410 (2013) 441-444
The effect of selected cutting parameters such as cutting speed, feed rate, depth of cut, and tool geometry on cutting forces different materials by various types of cutting tools were published in [4, 5, 10-14].
Blocks with dimensions of 60 × 20 × 100 mm were used as work piece materials.
Michal et al, Mathematical Modelling and Optimization of Technological Process Using Design of Experiments Methodology, Applied Mechanics and Materials 616 (2014) 61-68
Neslušan, Force load of cutting tool by turning of nickel alloy Inconel 718 with sintered carbide insert, Applied Mechanics and Materials 409-410 (2013) 441-444
Online since: October 2006
Authors: R. Swaminathan, J. Woods, S. Calvin, Joseph Huth, M.E. McHenry
McHenry
1,e
1
Materials Science and Engineering, Carnegie Mellon Univ., Pittsburgh, PA USA-15213
2
Sarah Lawrence College, Bronxville, NY USA -10708
3
Magnetics Technology Center (a division of Spang), 110 Delta Drive, Pittsburgh, PA USA 15238
4
Presently working at Intel Corporation, Chandler, AZ 85248.
NiZn ferrites are the only materials that can be used in microwave applications (100 MHz - 1 GHz range) such as power supply cores, because they have the highest resistivity among the ferrites.
McHenry: Journal of Applied Physics, 93(10), 749597 (2003) [6] R.
Bashkirova: Inorganic Materials, 11(2), 247-9 (1975)
Nikiforova: Inorganic Materials, 12(1), 58-60 (1976)
NiZn ferrites are the only materials that can be used in microwave applications (100 MHz - 1 GHz range) such as power supply cores, because they have the highest resistivity among the ferrites.
McHenry: Journal of Applied Physics, 93(10), 749597 (2003) [6] R.
Bashkirova: Inorganic Materials, 11(2), 247-9 (1975)
Nikiforova: Inorganic Materials, 12(1), 58-60 (1976)