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Online since: April 2015
Authors: Noh Yu Kim, Sung Young
Young’s modulus of the wire affected the force vs. elongation curve most effectively.
From these properties it can be used for actuators or control devices.
To analyze and design structural components such as hybrid composites involving shape memory alloys it is necessary to account for their unique mechanical behavior properly.
Young’s modulus of the SMA was the most influential factor and Young’s modulus of the CFRP matrix did not affect the force-displacement result as much as Young’s modulus of the SMA wire.
Kim, Mechanical Behavior of Shape Memory Alloy Composites, Key Eng.
From these properties it can be used for actuators or control devices.
To analyze and design structural components such as hybrid composites involving shape memory alloys it is necessary to account for their unique mechanical behavior properly.
Young’s modulus of the SMA was the most influential factor and Young’s modulus of the CFRP matrix did not affect the force-displacement result as much as Young’s modulus of the SMA wire.
Kim, Mechanical Behavior of Shape Memory Alloy Composites, Key Eng.
Online since: May 2023
Authors: Gerardo Terán-Mendez, Liliana Medina-Almazán, Ruben Cuamatzi-Melendez, Apolinar Albiter Hernández
In fixed platforms, the effect of water temperature and sea water flows affect the mechanical and microstructural properties of A36 plates steels employed in the welding connections as investigated by Surojo et al. [9].
Furthermore, Surojo et al. [11] investigated the effect on the mechanical properties of seawater flow rate on welded bead’s and A36 steel plates submerged in freshwater.
The findings revealed that the changes in water flow impact on the underwater weld defects, microstructure, and mechanical properties [12].
Prabowo, Mechanical and microstructural properties of A36 marine steel subjected to underwater wet welding, Metals 2021, Vol. 11, Page 999. 11 (2021) 999
Pratikno, Effect of underwater welding in marine environment and surface welding to mechanical properties of steel weld joint, Applied Mechanics and Materials, 862 (2017) 308–314
Furthermore, Surojo et al. [11] investigated the effect on the mechanical properties of seawater flow rate on welded bead’s and A36 steel plates submerged in freshwater.
The findings revealed that the changes in water flow impact on the underwater weld defects, microstructure, and mechanical properties [12].
Prabowo, Mechanical and microstructural properties of A36 marine steel subjected to underwater wet welding, Metals 2021, Vol. 11, Page 999. 11 (2021) 999
Pratikno, Effect of underwater welding in marine environment and surface welding to mechanical properties of steel weld joint, Applied Mechanics and Materials, 862 (2017) 308–314
Online since: December 2022
Authors: Alexander Ivanchenko, Volodymyr Hnatushenko, Tikhon Prokofyev
Conclusions
The move of dislocations and changes in the crystal lattice of deformable ZnS single crystals due to this movement in the PD process affects all the main parameters that determine their PL properties and correlate with changes in the PL spectra.
Fernández, Correlative study of structural and optical properties of ZnSe under severe plastic deformation, J.
[17] Electronic Properties of Dislocations in Semiconductors, Yu.A.
Polezhaev, Properties of emission centers in manganese doped zinc sulfide, J.
Schulze, Analisis of polymorphic properties ZnS(Mn) by lazer spectroscopy.
Fernández, Correlative study of structural and optical properties of ZnSe under severe plastic deformation, J.
[17] Electronic Properties of Dislocations in Semiconductors, Yu.A.
Polezhaev, Properties of emission centers in manganese doped zinc sulfide, J.
Schulze, Analisis of polymorphic properties ZnS(Mn) by lazer spectroscopy.
Online since: October 2006
Authors: Rainer Telle, Krishna Uibel, Thorsten Tonnesen, Simon Muenstermann
Introduction
Suitable tool materials are a key factor for the industrial application of semi-solid processing of high
melting point alloys, e.g. steels [1].
Ceramics in general exhibit promising high temperature properties such as mechanical strength, hardness and chemical resistance against metallic melts and slags.
In contrast, corrosive attack affects work piece quality but permits continuous forming in laboratory scale.
Sufficient strength at working temperature is required to withstand mechanical loads during forming, whereas a considerable temperature gradient has to be sustained throughout the cross section of the tool.
Acknowledgements The authors gratefully acknowledge the financial support of the Deutsche Forschungsgemeinschaft (DFG) within the Collaborative Research Centre SFB 289: "Forming of Metals in the Semi-Solid State and their Properties", www.rwth-aachen.de/sfb289.
Ceramics in general exhibit promising high temperature properties such as mechanical strength, hardness and chemical resistance against metallic melts and slags.
In contrast, corrosive attack affects work piece quality but permits continuous forming in laboratory scale.
Sufficient strength at working temperature is required to withstand mechanical loads during forming, whereas a considerable temperature gradient has to be sustained throughout the cross section of the tool.
Acknowledgements The authors gratefully acknowledge the financial support of the Deutsche Forschungsgemeinschaft (DFG) within the Collaborative Research Centre SFB 289: "Forming of Metals in the Semi-Solid State and their Properties", www.rwth-aachen.de/sfb289.
Online since: September 2014
Authors: Hui Wang, Fu Sheng Ni, Lei Gu
Experimental research on turning Ni-based superalloy with MQL using organic alcohols
Hui Wang1,2,a, Fusheng Ni1,2,b,*, Lei Gu1,2,c
1 College of Mechanical and Electrical Engineering, Hohai University, Changzhou, CHN
2 Engineering Research Center of Dredging Technology of Ministry of Education,
Hohai University, Changzhou, CHN
awanghui@hhuc.edu.cn, bfushengni@163.com, cGul@hhuc.edu.cn
Keywords: MQL, Green cutting, Cutting force, Ni-based superalloy
Abstract The machinability of Nickel-based superalloy GH4169 is poor.
But there are still some problems about dry cutting Nickel-based superalloy, one of them is the high temperature in cutting zone which negatively affects tool life.
The chemical composition of GH4169 was given in Table 2 and its physical and mechanical properties were shown in Table 3.
Table 2 Chemical components of the materials used(Wt)% Ni Cr Nb Mo Ti C Al Si Mn 51.75 17.00 5.11 2.93 1.04 0.042 0.41 0.21 0.03 Table 3 Physical and mechanical properties of the materials used Yield strength σs(MPa) Tensile strength σb (MPa) Elongation δ(%) Cross-section contraction ratio φ(%) Hardness HBS 1260 1430 24 40 390 Cooling and lubricating condition.
In this study, the experiments were proposed in single-factor method.
But there are still some problems about dry cutting Nickel-based superalloy, one of them is the high temperature in cutting zone which negatively affects tool life.
The chemical composition of GH4169 was given in Table 2 and its physical and mechanical properties were shown in Table 3.
Table 2 Chemical components of the materials used(Wt)% Ni Cr Nb Mo Ti C Al Si Mn 51.75 17.00 5.11 2.93 1.04 0.042 0.41 0.21 0.03 Table 3 Physical and mechanical properties of the materials used Yield strength σs(MPa) Tensile strength σb (MPa) Elongation δ(%) Cross-section contraction ratio φ(%) Hardness HBS 1260 1430 24 40 390 Cooling and lubricating condition.
In this study, the experiments were proposed in single-factor method.
Online since: November 2025
Authors: Mykola Riabchykov, Olexandr Alexandrov, Mykyta Alexandrov, Yuriy Sychov
They are highly sensitive to moisture and lose their thermal insulation properties.
The relevance of developing a mathematical model of fluid transport through porous building materials is driven by several important scientific, practical, and economic factors.
Moisture plays a key role in the physical, mechanical, and thermal insulation properties of building materials.
Water absorption, porosity and moisture diffusion properties for some building materials.
In the future, it is advisable to expand the model taking into account the heterogeneity of the material structure, temperature dependence and the action of variable external factors.
The relevance of developing a mathematical model of fluid transport through porous building materials is driven by several important scientific, practical, and economic factors.
Moisture plays a key role in the physical, mechanical, and thermal insulation properties of building materials.
Water absorption, porosity and moisture diffusion properties for some building materials.
In the future, it is advisable to expand the model taking into account the heterogeneity of the material structure, temperature dependence and the action of variable external factors.
Online since: December 2009
Authors: José Ignacio Pérez-Landazábal, Vicente Recarte, Jose Angel García, David Merida, Estibalitz Apiñaniz, Fernando Plazaola, Vicente Sánchez-Alarcos
These limitations have stimulated the research of new
ferromagnetic shape memory alloys having better mechanical properties.
Indeed, several studies have been performed to improve the mechanical and thermal properties.
Different techniques have been used to analyze diverse properties of Ni-Mn-Ga alloys; however, very little work has been performed to study the role of vacancies in the martensitic transformation.
This peak could be related to processes affecting the MT [7].
Therefore, it is conclude that vacancies affect the Mp transformation.
Indeed, several studies have been performed to improve the mechanical and thermal properties.
Different techniques have been used to analyze diverse properties of Ni-Mn-Ga alloys; however, very little work has been performed to study the role of vacancies in the martensitic transformation.
This peak could be related to processes affecting the MT [7].
Therefore, it is conclude that vacancies affect the Mp transformation.
Online since: January 2014
Authors: Tie Feng Yin
For soil of different regions, the influence of temperature on soil physical properties vary widely, even presents the opposite result.
For soil of different regions, the influence of temperature on soil physical properties vary widely, even presents the opposite result.
So we can consider water’s weight not affected by temperature.
Experimental study of thermal effects n the mechanical behaviour of a clay.
Finite element analysis of consolidation by vertical drains coupled thermo-hydro-mechanical effect[J].
For soil of different regions, the influence of temperature on soil physical properties vary widely, even presents the opposite result.
So we can consider water’s weight not affected by temperature.
Experimental study of thermal effects n the mechanical behaviour of a clay.
Finite element analysis of consolidation by vertical drains coupled thermo-hydro-mechanical effect[J].
Online since: November 2013
Authors: Mohammad Hossein Tanhai, Peyman Nayebi, Shahyar Saramad
At the same time, MD simulations also estimates the physical properties of nanofluids by solving the equations of molecular motion.
The flow real flow that occurs in a practical nano nozzle may be more complicated than a simple flow, that many factors such as the nozzle geometry, flow type and boundary conditions may be involved altogether.
The molecular interaction forces usually depend on the physical properties and space phase structures of the fluid and wall molecules.
In the usual case, heating has a larger effect on the stream properties than the vapor removal.
The application of the proposed model for supersonic flow in a convergent-divergent nano nozzle, demonstrated the capability of this model to predict the detailed flow properties of both gas and clusters.
The flow real flow that occurs in a practical nano nozzle may be more complicated than a simple flow, that many factors such as the nozzle geometry, flow type and boundary conditions may be involved altogether.
The molecular interaction forces usually depend on the physical properties and space phase structures of the fluid and wall molecules.
In the usual case, heating has a larger effect on the stream properties than the vapor removal.
The application of the proposed model for supersonic flow in a convergent-divergent nano nozzle, demonstrated the capability of this model to predict the detailed flow properties of both gas and clusters.
Online since: November 2016
Authors: Shi Jie Guo, Chun Zou, Hui Xue Jiang, Hiromi Nagaumi
With the development of modern industry of aviation and aerospace, the demand for the strength and over-all properties of high strength alloy is much higher [1].
One of the main problems in thick plate products of high strength alloy is the formation of microporosity, which may cause the decrease of mechanical property (especially fatigue property).
Casting defect such as porosity is usually present in the as-cast microstructure and can lead to the deterioration of mechanical properties because the difference of temperature gradient and cooling rate in the ingot is large.
Many studies have shown the detrimental effect of porosity on fatigue properties for materials used in the as-cast or heat-treated form [2-4].
Lee has simulated the volume fraction, amount and size of porosity for different content of Mg in Al-Mg alloy DC ingot, also the results has been compared with experimental results [7]; Dobra has studied the formation and effect factors of micro pores for 5083 alloy DC ingot, who pointed out that the formation of pores was because of the nucleation of hydrogen bubble, also it was affected by the filling condition in the mold [8]; Nagaumi gave a new method for the prediction of porosity in Al-Mg alloy slab ingot, hydrogen supersaturated mass in the inter-dendritic liquid and the pressure drop were taken into account in his prediction model, the calculated results correspond well with the experimental results using this method [9].
One of the main problems in thick plate products of high strength alloy is the formation of microporosity, which may cause the decrease of mechanical property (especially fatigue property).
Casting defect such as porosity is usually present in the as-cast microstructure and can lead to the deterioration of mechanical properties because the difference of temperature gradient and cooling rate in the ingot is large.
Many studies have shown the detrimental effect of porosity on fatigue properties for materials used in the as-cast or heat-treated form [2-4].
Lee has simulated the volume fraction, amount and size of porosity for different content of Mg in Al-Mg alloy DC ingot, also the results has been compared with experimental results [7]; Dobra has studied the formation and effect factors of micro pores for 5083 alloy DC ingot, who pointed out that the formation of pores was because of the nucleation of hydrogen bubble, also it was affected by the filling condition in the mold [8]; Nagaumi gave a new method for the prediction of porosity in Al-Mg alloy slab ingot, hydrogen supersaturated mass in the inter-dendritic liquid and the pressure drop were taken into account in his prediction model, the calculated results correspond well with the experimental results using this method [9].