Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: July 2016
Authors: Marek Slováček, Josef Tejc, Momir Vanek
The number of macro sections, time steps are defined based on the welding technology parameters and experience with this method.
The LG methodology enables simulate very huge structure with very large number of the weld joints.
Shrinkage method (SM), WELD PLANNER Code: The Weld Planer is new programme and can be used for very fast distortion prediction on construction with high number of welding joints.
Austenitic grain size 5.
Based on welding numerical solution there is possible make optimization of clamping tools as modification of stiffness or place and number. 4.
The LG methodology enables simulate very huge structure with very large number of the weld joints.
Shrinkage method (SM), WELD PLANNER Code: The Weld Planer is new programme and can be used for very fast distortion prediction on construction with high number of welding joints.
Austenitic grain size 5.
Based on welding numerical solution there is possible make optimization of clamping tools as modification of stiffness or place and number. 4.
Online since: April 2019
Authors: Tawat Soitong, Supattra Wongsaenmai, Rakdiaw Muangma
And then, the correlation between shear modulus (G) and Brinell Hardness Number (BHN) was obtained by using the simulation of experimental results.
When m was the integer number that referred to the highest degree of polynomial.
Nakornfang, Effect of post-weld heat treatment on changes in the heat affected zone grain size and hardness in dissimilar welds of power plant boiler tubes grade ASTM SA213TP347H and grade ASTM SA213-T22, The Conference of International Welding and Inspection Technology (2017) 98 –105
When m was the integer number that referred to the highest degree of polynomial.
Nakornfang, Effect of post-weld heat treatment on changes in the heat affected zone grain size and hardness in dissimilar welds of power plant boiler tubes grade ASTM SA213TP347H and grade ASTM SA213-T22, The Conference of International Welding and Inspection Technology (2017) 98 –105
Online since: June 2013
Authors: Dharam Persaud-Sharma, Anthony J. McGoron, Noah Budiansky
Visually, the surfaces after experimentation and SEM sample preparation for imaging are coarser, have an increased surface roughness, and have more defined grain boundaries.
Characteristically, white deposits are visible on the surface of these alloys, with pronounced grain boundaries after the 72-hour period.
Thus, the 85% extract concentration increased the number of fibroblast cells by 57% because it contained a higher concentration of copper, as compared to the 65% extract concentration which only increased the number of fibroblast cells by 17%.
Dharam Persaud is also supported by NIH Fellowship number NIH/NIGMS R25 GM061347.
Effect of zirconium on the grain size of magnesium containing 4.5% Zn.
Characteristically, white deposits are visible on the surface of these alloys, with pronounced grain boundaries after the 72-hour period.
Thus, the 85% extract concentration increased the number of fibroblast cells by 57% because it contained a higher concentration of copper, as compared to the 65% extract concentration which only increased the number of fibroblast cells by 17%.
Dharam Persaud is also supported by NIH Fellowship number NIH/NIGMS R25 GM061347.
Effect of zirconium on the grain size of magnesium containing 4.5% Zn.
Online since: August 2005
Authors: Marc Anglada, Alberto Juy
This threshold is lower
when transformability is higher and it depends on the number of contact cycles.
But after a given large number of cycles, no further important additional degradation takes place.
The minimum number of tests carried out for each condition was 10, so that each experimental point corresponds to the average of 10 tests.
The damage induced by one single cycle was compared to that induced by repeated number of cycles and the damage under the contact surface was analysed by means of SEM.
The influence of the repeated load-unloading during a given number of cycles (10 3 ) on the strength degradation is shown in Fig. 4 in terms of the maximum load per cycle.
But after a given large number of cycles, no further important additional degradation takes place.
The minimum number of tests carried out for each condition was 10, so that each experimental point corresponds to the average of 10 tests.
The damage induced by one single cycle was compared to that induced by repeated number of cycles and the damage under the contact surface was analysed by means of SEM.
The influence of the repeated load-unloading during a given number of cycles (10 3 ) on the strength degradation is shown in Fig. 4 in terms of the maximum load per cycle.
Online since: June 2013
Authors: Hirohiko Takuda, Naoya Kitamura, Hitoshi Fujimoto, Takayuki Hama
To increase the number of applications of the press forming, it is crucial to understand mechanical properties of Mg alloy sheets.
The activity of each family of slip or twinning systems i is defined in the form [3] , (4) where n is the number of grains, and k is the number of systems of the family i.
The activity of each family of slip or twinning systems i is defined in the form [3] , (4) where n is the number of grains, and k is the number of systems of the family i.
Online since: August 2011
Authors: Rui Feng Zhang, Miao Shui, Jie Shu, Yuan Long Ren
Furthermore, particles prepared by those methods are usually with broad size distribution and relatively large grain size, usually above 40 to 50 nanometers.
Acknowledgements We gratefully acknowledge the support of 973 Fundamental research program from the ministry of science and technology of China through grant number 2010CB635116, Scientific Research Fund of Zhejiang Provincial Education Department grant number Y201017390 and K.C.
Acknowledgements We gratefully acknowledge the support of 973 Fundamental research program from the ministry of science and technology of China through grant number 2010CB635116, Scientific Research Fund of Zhejiang Provincial Education Department grant number Y201017390 and K.C.
Online since: December 2011
Authors: Purimpat Sujumnongtokul, Rungtawan Wiwattanasirikul
Introduction
The determination of minimum power to transport the grains or small particles in pneumatic conveying system is an important role in engineering design and operation.
For the conveying efficiency, the efficiency generally drops exponentially with the media velocity (present in terms of Renolds’ number) as show in Fig. 9.
The pattern of conveying efficiency versus media Reynolds’ number was observed and could be useful for designs and operations.
For the conveying efficiency, the efficiency generally drops exponentially with the media velocity (present in terms of Renolds’ number) as show in Fig. 9.
The pattern of conveying efficiency versus media Reynolds’ number was observed and could be useful for designs and operations.
Online since: September 2011
Authors: Hong Pu Zhao, Shun Xing Wang
The number of pitting corrosion is decreasing on the surface of Ferrite with solid solution temperature rising,shown in the figure 5b(950℃),5c(1000℃).The pitting corrosion has disappeared essential at 1050 ℃;because the strength and capability of stainless steel are greatly improved by existence of Ferrite[5] ,the depth of interphase becomes from deep to shallow and disappear above 1050℃.When the solid temperature goes up 1200℃,the corrosive depth in Austenite is getting deep and the interphase corrosion appears again,shown in figure 5(f).Attached to table 2,the corrosion quantities are increasing at 1200℃.
(a) (b) (c) (d) (e) (f) Fig.5 The corrosion microstructure of 00Cr26Ni5Mo2Cu3Re under SCAN Through solid solution treatment ,one side the carbide which had separated out during in casting is dissolved ,alloying elements redistributed and grain refinement is enhanced[4] ,so the corrosive resistance of material is improved;on the other side,from the relationship between phases content and solid solution,the content of Ferrite is increasing with the solid solution temperature rising and due to the strength and capability of stainless steel are greatly improved by existence of Ferrite,so this is why that the pitting corrosion in Ferrite and interphase corrosion reduce in degree from figure 5(a) to 5(d),and it can be proved by the corrosion rate from table 2.
The essence that stainless steel has good corrosive resistance property lies in that it has high pitting resistance.Generally PREN (pitting resistance equivalent number) is the standard to judge the corrosive resistance property,and the formula is PREN= Cr%+3.3×Mo%+16×N%[2].It can be seen that the alloying elements of Cr and Mo are the key to material,this is why Austerity prior to Ferrite are corroded and form some deep pits.
(a) (b) (c) (d) (e) (f) Fig.5 The corrosion microstructure of 00Cr26Ni5Mo2Cu3Re under SCAN Through solid solution treatment ,one side the carbide which had separated out during in casting is dissolved ,alloying elements redistributed and grain refinement is enhanced[4] ,so the corrosive resistance of material is improved;on the other side,from the relationship between phases content and solid solution,the content of Ferrite is increasing with the solid solution temperature rising and due to the strength and capability of stainless steel are greatly improved by existence of Ferrite,so this is why that the pitting corrosion in Ferrite and interphase corrosion reduce in degree from figure 5(a) to 5(d),and it can be proved by the corrosion rate from table 2.
The essence that stainless steel has good corrosive resistance property lies in that it has high pitting resistance.Generally PREN (pitting resistance equivalent number) is the standard to judge the corrosive resistance property,and the formula is PREN= Cr%+3.3×Mo%+16×N%[2].It can be seen that the alloying elements of Cr and Mo are the key to material,this is why Austerity prior to Ferrite are corroded and form some deep pits.
Online since: April 2015
Authors: Maria Chepak-Gizbrekht, Anna G. Knyazeva
Also we assume that diffusion and heating zones are less then plate thickness , therefore the last grain conditions we formulate for :
;
; .
Here – are a linear thermal expansion coefficients, ( – number of diffusant element, – indication of layers) – are coefficients concentration expansion in materials (they are proportional to the relation of nuclear volume of a diffusive component to the volume of all components which are present at material), temperature and concentration are follows with the solution thermal-conductivity problem; “0” index belongs to an initial time point, – Young modulus, – Poisson ratio, – Kronecker delta, – thickness of coating, – thickness of base.
Acknowledgment Work is performed with financial support within realization of the state task of the Ministry of Education and Science of the Russian Federation for 2014 – 2016 years, grant number of research work is 11.815.214/K.
Here – are a linear thermal expansion coefficients, ( – number of diffusant element, – indication of layers) – are coefficients concentration expansion in materials (they are proportional to the relation of nuclear volume of a diffusive component to the volume of all components which are present at material), temperature and concentration are follows with the solution thermal-conductivity problem; “0” index belongs to an initial time point, – Young modulus, – Poisson ratio, – Kronecker delta, – thickness of coating, – thickness of base.
Acknowledgment Work is performed with financial support within realization of the state task of the Ministry of Education and Science of the Russian Federation for 2014 – 2016 years, grant number of research work is 11.815.214/K.
Online since: October 2013
Authors: Rong Qiang Hu, Di Ma, Shi Zhong Ma
Interlayer deposited in the lateral accretion was dominated by fine-grained components.
The point bar was drilled by 12 wells and the number of interlayer was 42, 13 of them were mudstone interlayer.
When there was no production well in the flow unit, a large number of high-pressure remaining oil enriched in the upper and the middle of flow unit because the injectant came in this unit without drainage channel.
The point bar was drilled by 12 wells and the number of interlayer was 42, 13 of them were mudstone interlayer.
When there was no production well in the flow unit, a large number of high-pressure remaining oil enriched in the upper and the middle of flow unit because the injectant came in this unit without drainage channel.