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Online since: December 2018
Authors: Per Hansson, Magnus Areskoug
The need of vacuum chambers and restrictions in the manipulation of the EB gun is also factors which give problems in the industrialization of the process.
Mechanical properties of the parent plates, transverse to final rolling direction.
Weld metal mechanical properties of ESAB OK Tubrod 14.13 Rp0.2 (MPa) Rm (MPa) A5 (%) KV @ -20 °C (J) 530 580 26 120 Figure 1.
The resulting mechanical properties in the EB welded joints in both Steel A and B is very close to the parent plates.
Factors which affect the mechanical properties in the weld metal like solidification mode, solution hardening and dislocation pattern could not be examined in the light microscope.
Mechanical properties of the parent plates, transverse to final rolling direction.
Weld metal mechanical properties of ESAB OK Tubrod 14.13 Rp0.2 (MPa) Rm (MPa) A5 (%) KV @ -20 °C (J) 530 580 26 120 Figure 1.
The resulting mechanical properties in the EB welded joints in both Steel A and B is very close to the parent plates.
Factors which affect the mechanical properties in the weld metal like solidification mode, solution hardening and dislocation pattern could not be examined in the light microscope.
Online since: July 2011
Authors: Bin Zhao, Jian Wu, Hai Chuan Wang, Kai Zhong Wang, Wei Sun, Jian Jun Wang, Jie Lie
Key words: Single-slag Process, high-aluminum cold heading steel, composition control, property
Abstract: Based on the actual process for smelting cold heading steel, this article adopts the single-slag process to smelt the low-carbon, low-silicon and high-alumina cold heading steel SWRCH6A, so as to study the effect of technological factors of the smelting process on the change of molten steel component in various working procedures and steel properties.
All the mechanical properties of cold heading steel exceed the ML08Al standard.
For mechanical properties of each item, see Table 3.
Table 3 Mechanical Properties of High-Aluminum cold heading Steel Smelting by Single-slag Process Batch No.
All the mechanical properties of the cold heading steel exceed the ML08Al standard.
All the mechanical properties of cold heading steel exceed the ML08Al standard.
For mechanical properties of each item, see Table 3.
Table 3 Mechanical Properties of High-Aluminum cold heading Steel Smelting by Single-slag Process Batch No.
All the mechanical properties of the cold heading steel exceed the ML08Al standard.
Online since: April 2011
Authors: Chun E Sui, Yue Li, Xiu Li Du
However, some disadvantage factors in SCC, such as large dosages of cementitious materials and additives, also cause the SCC have large amount of shrinkage and easy to crack [6].
Therefore, under both positive and negative factors, the performance of SCC durability also deserves further research.
There are many works shown that SCC has excellent mechanical properties and utilized in many projects.
The Mixture Design and Mechanical Properties of SCC The mixture designs of the various SCC mixtures are shown in table 1, and the mechanical properties are shown in table 2.
Ozawa, in: Mixture properties of self-compacting highperformance concrete, Proc. of 3rd CANMET/ACI Inter, Conf. on Design and Materials and Recent Advances in Concrete Technology, ACI SP 172, Kuala Lumpur, Malaysia, American Concrete Institute,Farmington Hills, MI, USA, PP. 623– 637.(1997) [4] P.L.Domone, in:A review of the hardened mechanical properties of self-compacting concrete”.
Therefore, under both positive and negative factors, the performance of SCC durability also deserves further research.
There are many works shown that SCC has excellent mechanical properties and utilized in many projects.
The Mixture Design and Mechanical Properties of SCC The mixture designs of the various SCC mixtures are shown in table 1, and the mechanical properties are shown in table 2.
Ozawa, in: Mixture properties of self-compacting highperformance concrete, Proc. of 3rd CANMET/ACI Inter, Conf. on Design and Materials and Recent Advances in Concrete Technology, ACI SP 172, Kuala Lumpur, Malaysia, American Concrete Institute,Farmington Hills, MI, USA, PP. 623– 637.(1997) [4] P.L.Domone, in:A review of the hardened mechanical properties of self-compacting concrete”.
Online since: May 2020
Authors: Jian Min Yu, Zhi Min Zhang, Kai Liu, Ping Xu
At present, Mg-Gd-Y-Zn-Zr alloys with significant mechanical properties due to the existence of long period ordered phase (LPSO phase) in their microstructure have become the focus of rare earth magnesium alloys because of their remarkable mechanical properties [5-8].
It can be seen from the characteristics of the flow stress curve shown in Fig. 2 that the factors affecting the rheological behavior of the compression-torsion deformation are temperature, strain rate and strain.
Zhang, The intrinsic effect of long period stacking ordered phases on mechanical properties in Mg-RE based alloys, J.
Zhang, The intrinsic effect of long period stacking ordered phases on mechanical properties in Mg-RE based alloys, J.
Yuan, Microstructure development and tensile mechanical properties of Mg-Zn-RE-Zr magnesium alloy, Mater.
It can be seen from the characteristics of the flow stress curve shown in Fig. 2 that the factors affecting the rheological behavior of the compression-torsion deformation are temperature, strain rate and strain.
Zhang, The intrinsic effect of long period stacking ordered phases on mechanical properties in Mg-RE based alloys, J.
Zhang, The intrinsic effect of long period stacking ordered phases on mechanical properties in Mg-RE based alloys, J.
Yuan, Microstructure development and tensile mechanical properties of Mg-Zn-RE-Zr magnesium alloy, Mater.
Online since: January 2014
Authors: Xiong Fei Zhang, Shuang Hong Tian, Ting Liu, Ling Jun Kong, Ya Xiong
The intertwining action of the hyacinth fiber on the mechanical properties of pellets was investigated.
The negative effect of elastic recovery on the other mechanical properties of pellets should be evaluated.
By comparing the mechanical properties of H/S-BPs to S-BPs from Fig. 1 and Fig. 3, we can found that the mechanical properties of H/S-BPs were better than S-BPs.
Kaliyan, R.V.Morey, Factors affecting strength and durability of densified biomass products, Biomass Bioenerg. 33 (2009) 337-359
Morey, Factors affecting strength and durability of densified biomass products, Biomass Bioenerg. 33 (2009) 337-359
The negative effect of elastic recovery on the other mechanical properties of pellets should be evaluated.
By comparing the mechanical properties of H/S-BPs to S-BPs from Fig. 1 and Fig. 3, we can found that the mechanical properties of H/S-BPs were better than S-BPs.
Kaliyan, R.V.Morey, Factors affecting strength and durability of densified biomass products, Biomass Bioenerg. 33 (2009) 337-359
Morey, Factors affecting strength and durability of densified biomass products, Biomass Bioenerg. 33 (2009) 337-359
Online since: May 2020
Authors: Alexander N. Maznichevsky, Yuri N. Goikhenberg, Radii V. Sprikut
Mechanical properties conducted after quenching at two temperatures in water.
The analysis of the mechanical properties at room temperature showed that nitrogen alloying increase in strength of pilot steel at sufficiently high values of plastic properties (see Table 2).
Mechanical properties and technological plasticity of middle-nitrogen steel 1 - AISI 304L; 2 - 03Cr18Ni11Mn1N0.16; 3 - 03Cr20Ni9Mn3N0.30; 4 - 03Cr20Ni9Mn3N0.27 Fig. 5.
Speidel, Properties and applications of high nitrogen steels.
Speidel, Properties of high nitrogen steels.
The analysis of the mechanical properties at room temperature showed that nitrogen alloying increase in strength of pilot steel at sufficiently high values of plastic properties (see Table 2).
Mechanical properties and technological plasticity of middle-nitrogen steel 1 - AISI 304L; 2 - 03Cr18Ni11Mn1N0.16; 3 - 03Cr20Ni9Mn3N0.30; 4 - 03Cr20Ni9Mn3N0.27 Fig. 5.
Speidel, Properties and applications of high nitrogen steels.
Speidel, Properties of high nitrogen steels.
Online since: February 2013
Authors: Heng An Wu, Zhi Luo, Xiao Long Wang, Hong Jie Jing
This has led to a wide range of applications as structural materials especiallyin aircraft structures[2,3,4].Thermal residual stress, produced by the curing and cooling process, is one of the important factors which can affect the mechanical performances of composites.Many researchers have fully investigated thermal resudual stress in composites through numerical or experimental methods [5,6,7].
Matrix-fiber debonding affects the performance of fiber-reinforced composites.It was found that the mechanical properties of composites under transverse compression were mainly controlled by interface strength and the failure of composites was due to the interface debonding[9,10,11,12,13].
It is clearly shown that S23 are higher than S13 and S33 in the two models,so S23 is the dominant factor resulting in debonding.
Conclusion Since thermal residual stress is one of the important factors which can affect the mechanical performances of composites, we presented a three-dimensional finite element model to investigate the effects of nanoparticles on the interface strength of unidirectional fiber reinforced composites.The comparison between the results of two models show that the thermal residual stress in the model with nanoparticles is significantly reduced, while the shear stress in the model without nanoparticles is the dominant factor resulting in interface debonding.
Mittal, Effect of architecture on mechanical properties of carbon/carbon composites, Composite Structures. 83 (2008)131-142
Matrix-fiber debonding affects the performance of fiber-reinforced composites.It was found that the mechanical properties of composites under transverse compression were mainly controlled by interface strength and the failure of composites was due to the interface debonding[9,10,11,12,13].
It is clearly shown that S23 are higher than S13 and S33 in the two models,so S23 is the dominant factor resulting in debonding.
Conclusion Since thermal residual stress is one of the important factors which can affect the mechanical performances of composites, we presented a three-dimensional finite element model to investigate the effects of nanoparticles on the interface strength of unidirectional fiber reinforced composites.The comparison between the results of two models show that the thermal residual stress in the model with nanoparticles is significantly reduced, while the shear stress in the model without nanoparticles is the dominant factor resulting in interface debonding.
Mittal, Effect of architecture on mechanical properties of carbon/carbon composites, Composite Structures. 83 (2008)131-142
Online since: November 2014
Authors: Raja Izamshah, Mohd Hadzley, Bukhari Manshoor, Mohd Amri, Mohd Amran, Siti Salmah, Abdul Faiz, Mohd Shahir
Factors and levels
Factors
Levels
1
2
3
Injection Time [s]
0.5
1.0
1.5
Packing Time [s]
4.0
5.0
6.0
Melt Temperature [˚C]
240
255
270
Mould Temperature [˚C]
21
31
41
Four factors and three levels were used in this experiment.
Four controllable factors were selected for this experiment.
That means that, the most significant factors that affect warpage are injection time and packing time followed by mould temperature and melt temperature.
Koshirai, Rheological properties for polypropylene modified by polytetrafluoroethylene, J.
Sulaiman, Identifying the critical moulding machine parameters affecting injection moulding process by basic statistical process control tools, Int.
Four controllable factors were selected for this experiment.
That means that, the most significant factors that affect warpage are injection time and packing time followed by mould temperature and melt temperature.
Koshirai, Rheological properties for polypropylene modified by polytetrafluoroethylene, J.
Sulaiman, Identifying the critical moulding machine parameters affecting injection moulding process by basic statistical process control tools, Int.
Online since: February 2011
Authors: Nor Bahiyah Baba, Alan Davidson, Tariq Muneer
The composition of Ni and YSZ in the coating deposition is controlled to give desired properties.
The conventional EN deposition is controlled by several factors such as bath composition, bath temperature, bath pH and soaking time.
As for the EN composite coating, various factors have been shown to affect the deposition of EN composites, including (1) particle catalytic inertness, (2) particle charge, (3) EN bath composition, (4) bath reactivity, (5) particle compatibility with the matrix, (6) plating rate, and (7) particle size distribution [6].
The advantage of factorial against Taguchi is the ability to study the interaction between factors, if any.
Fig. 2: 3-way interaction contour plot of factor A, C and B at (a) -1 (b) +1 The influence of factor B on both main factors A and C in determining low Ni to YSZ ratio is greatly affected by factor A (particle size).
The conventional EN deposition is controlled by several factors such as bath composition, bath temperature, bath pH and soaking time.
As for the EN composite coating, various factors have been shown to affect the deposition of EN composites, including (1) particle catalytic inertness, (2) particle charge, (3) EN bath composition, (4) bath reactivity, (5) particle compatibility with the matrix, (6) plating rate, and (7) particle size distribution [6].
The advantage of factorial against Taguchi is the ability to study the interaction between factors, if any.
Fig. 2: 3-way interaction contour plot of factor A, C and B at (a) -1 (b) +1 The influence of factor B on both main factors A and C in determining low Ni to YSZ ratio is greatly affected by factor A (particle size).
Online since: June 2014
Authors: Guo Dong Qian, Ming Li
Influence factors of dispersant effectiveness
Many experimental studies have been conducted on the effectiveness of chemical dispersant in the last fifty years, indicating that a number of chemical and environmental factors can influence dispersant performance, which include the properties of the oil, mixing energy, compositions of dispersant, amount and method of dispersant applied, temperature, and salinity.
The oil properties and mixing energy are the major influence factors of dispersant effectiveness.
The influence of oil properties on the effectiveness of dispersant mainly reflects on the viscosity and the composition of the oil.
The environmental factors such as temperature and salinity of the seawater are significant to the dispersion of the spilled oil.
Although the environment factors can be accurately reflected, some other factors such as test method, experiment cost and potential environment pollution limit the field trial.
The oil properties and mixing energy are the major influence factors of dispersant effectiveness.
The influence of oil properties on the effectiveness of dispersant mainly reflects on the viscosity and the composition of the oil.
The environmental factors such as temperature and salinity of the seawater are significant to the dispersion of the spilled oil.
Although the environment factors can be accurately reflected, some other factors such as test method, experiment cost and potential environment pollution limit the field trial.