Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: October 2008
Authors: Irene Calliari, Manuele Dabalà, Emilio Ramous, Giovanni Straffelini
Such
reduction could be compensated by the increase of the manganese and nitrogen contents, to
maintain the typical balanced microstructure of DSS, with about the same content of ferrite and
austenite.
Indeed the reduction of the nickel and mainly of the molybdenum contents seems to avoid the precipitation of intermetallic phases, very detrimental for the toughness and corrosion resistance of conventional DSS.
Thus, in the temperature range above 800°C, there is a good agreement between our results, Thermocalc calculations, Lee evaluations and other experimental data on Fe-Cr-Mn system, all indicating that, for the composition of our steel, the formation of the σ-phase is not possible and the microstructure consist of α-ferrite and γaustenite only.
This is not confirmed by 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 200 400 600 800 1000 1200 1400 1600 THERMO-CALC (2007.05.16:13.48) : DATABASE:TCFE3 W(CR)=0.22, W(NI)=1E-2, W(MO)=5E-3, W(N)=2E-3, W(C)=3E-4, W(MN)=5E-2, P=1E5, N=1; 1 1:T-273.15,NP(BCC_A2#1) 2 2:T-273.15,NP(FCC_A1#1) 1 3 3:T-273.15,NP(LIQUID) 1 3 1 2 12 4 4:T-273.15,NP(HCP_A3#2) 1 2 4 5 5:T-273.15,NP(M23C6) 1 2 45 6 6:T-273.15,NP(SIGMA#2) 1 4 5 6 1 7 7:T-273.15,NP(FCC_A1#2) 45 6 18 8:T-273.15,NP(BCC_A2#2) 7 45 6 TEMPERATURE_CELSIUS Molar Fraction of Phase 2007-05-16 13:48:14.40 output by user Massimo from PELLIZZARIPC 2 1 L Cr2N our results or by Lee evaluations [7] and other experimental data [8, 9].
Indeed the reduction of the nickel and mainly of the molybdenum contents seems to avoid the precipitation of intermetallic phases, very detrimental for the toughness and corrosion resistance of conventional DSS.
Thus, in the temperature range above 800°C, there is a good agreement between our results, Thermocalc calculations, Lee evaluations and other experimental data on Fe-Cr-Mn system, all indicating that, for the composition of our steel, the formation of the σ-phase is not possible and the microstructure consist of α-ferrite and γaustenite only.
This is not confirmed by 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 200 400 600 800 1000 1200 1400 1600 THERMO-CALC (2007.05.16:13.48) : DATABASE:TCFE3 W(CR)=0.22, W(NI)=1E-2, W(MO)=5E-3, W(N)=2E-3, W(C)=3E-4, W(MN)=5E-2, P=1E5, N=1; 1 1:T-273.15,NP(BCC_A2#1) 2 2:T-273.15,NP(FCC_A1#1) 1 3 3:T-273.15,NP(LIQUID) 1 3 1 2 12 4 4:T-273.15,NP(HCP_A3#2) 1 2 4 5 5:T-273.15,NP(M23C6) 1 2 45 6 6:T-273.15,NP(SIGMA#2) 1 4 5 6 1 7 7:T-273.15,NP(FCC_A1#2) 45 6 18 8:T-273.15,NP(BCC_A2#2) 7 45 6 TEMPERATURE_CELSIUS Molar Fraction of Phase 2007-05-16 13:48:14.40 output by user Massimo from PELLIZZARIPC 2 1 L Cr2N our results or by Lee evaluations [7] and other experimental data [8, 9].
Online since: October 2010
Authors: Adolfo Preciado Quiroz, Silvio T. Sperbeck, Harald Budelmann, Gianni Bartoli, Elham Bazrafshan
This last classification is a combination of the analytical methods with real data of the
building obtained experimentally (mechanical and dynamic information).
This experimental data is a valuable tool for the calibration (or updating) of the model, obtaining more reliable results towards the real seismic performance of the structure.
Results showed that the ultimate load capacity and ductility could be improved satisfactory depending on the prestressing level and the device, allowing with this the vulnerability reduction of the towers (seismic risk mitigation).
Even when SMAs combined with AFRP showed less stiff behavior compared to prestressing steel, results interesting to conclude that this combined device allowed less change (increment + and reduction -) of the prestressing force in the order of ± 5%, compared to prestressing steel with a change of ± 20%.
This experimental data is a valuable tool for the calibration (or updating) of the model, obtaining more reliable results towards the real seismic performance of the structure.
Results showed that the ultimate load capacity and ductility could be improved satisfactory depending on the prestressing level and the device, allowing with this the vulnerability reduction of the towers (seismic risk mitigation).
Even when SMAs combined with AFRP showed less stiff behavior compared to prestressing steel, results interesting to conclude that this combined device allowed less change (increment + and reduction -) of the prestressing force in the order of ± 5%, compared to prestressing steel with a change of ± 20%.
Online since: January 2006
Authors: Shuzo Otsuka, Yoshihisa Nakata, Takeshi Saito, Hiroki Takahashi, Keishi Tobinai, Torao Kemi
Introduction
Reduction of dioxin emission and life-sustaining of wastes landfill yards have recently made local
governments equipped with melting-solidification plants to recycle domestic wastes [1].
Melting and solidification method is a direct melting, gasification-melting system with a vertical shaft furnace where raw materials are directly melted in a high temperature reduction environment at a temperature from 1700 to 1800 ℃.
However, a slight variation was observed by the sampling month, thus the aggregate quality may be influenced according to regional and seasonal conditions of the domestic wastes and thereby a year round data is needed.
For a wider application of the molten slag fine aggregate to concrete structures, more data should be accumulated.
Melting and solidification method is a direct melting, gasification-melting system with a vertical shaft furnace where raw materials are directly melted in a high temperature reduction environment at a temperature from 1700 to 1800 ℃.
However, a slight variation was observed by the sampling month, thus the aggregate quality may be influenced according to regional and seasonal conditions of the domestic wastes and thereby a year round data is needed.
For a wider application of the molten slag fine aggregate to concrete structures, more data should be accumulated.
Research on Fault Mechanism of Rotor to Stator Rub Nonlinear Vibration in High-Speed Turbo Machinery
Online since: July 2003
Authors: Jin Ji Gao, Zhinong Jiang
Condition monitoring and fault diagnosis on site
3.1 Vibration data acquisition and reduction
In the malfunction condition, excessive vibration did not drop even when the rotor had passed
through the threshold load.
To determine the exact cause of the fault, dynamic data of the rotor vibration on the #3 bearing had been acquired and processed by Bently Nevada instrumentation in the field for detecting trouble
The upward motion of axial center position from the bottom part of the bearing will cause a considerable reduction of stiffness.
To determine the exact cause of the fault, dynamic data of the rotor vibration on the #3 bearing had been acquired and processed by Bently Nevada instrumentation in the field for detecting trouble
The upward motion of axial center position from the bottom part of the bearing will cause a considerable reduction of stiffness.
Online since: May 2016
Authors: Pacharawan Ratanasongtham, Ruangsri Watanesk, Surasak Watanesk, Lalida Shank, Jaroon Jakmunee
The amount of oxygen consumed by this reaction can be determined by measuring the reduction current of oxygen.
Effect of various interferences on response of the fabricated biosensor (5 replications) Interference (1.0 mM) None (AA; 5mM ) Citric acid Glucose NaCl Ethanol % Relative error 0.0 0.0 2.1±0.5 0.0 0.0 The data demonstrate that the test substances have no significant interfering effect on the determination of AA, except glucose.
The data demonstrate that the fabricated biosensor exhibits somewhat good response time and wide linear range compared to other reports.
Lykkesfeldt, Determination of Ascorbic Acid and Dehydroascorbic Acid in Biological Samples by High-Performance Liquid Chromatography Using Subtraction Methods: Reliable Reduction with Tris[2-carboxyethyl]phosphine Hydrochloride, Anal.
Effect of various interferences on response of the fabricated biosensor (5 replications) Interference (1.0 mM) None (AA; 5mM ) Citric acid Glucose NaCl Ethanol % Relative error 0.0 0.0 2.1±0.5 0.0 0.0 The data demonstrate that the test substances have no significant interfering effect on the determination of AA, except glucose.
The data demonstrate that the fabricated biosensor exhibits somewhat good response time and wide linear range compared to other reports.
Lykkesfeldt, Determination of Ascorbic Acid and Dehydroascorbic Acid in Biological Samples by High-Performance Liquid Chromatography Using Subtraction Methods: Reliable Reduction with Tris[2-carboxyethyl]phosphine Hydrochloride, Anal.
Online since: January 2006
Authors: Ennio Bonetti, Marcello Cabibbo, E. Evangelista, C. Scalabroni
A reduction in grain
size has the advantage of improving the strength and toughness of the material at room temperature
and, if the small grain sizes is retained to elevated temperatures, there is also a potential for
achieving good formability and superplastic ductility.
Micro-hardness tests were carried out by applying a load of 100g for 15s, and average data were calculated from a series of 20 independent measurements repeated for each condition.
These data indicate the Sc addition to markedly favour the dispersoids precipitation, which in fact are finely dispersed in the whole material's microstructure.
Therefore, nanometre Al3(Sc1-x,Zrx) dispersoids continuously pin dislocations and cell boundaries with strain resulting in a larger reduction in conductivity in a much more effective way than in Al3Zr containing alloy.
Micro-hardness tests were carried out by applying a load of 100g for 15s, and average data were calculated from a series of 20 independent measurements repeated for each condition.
These data indicate the Sc addition to markedly favour the dispersoids precipitation, which in fact are finely dispersed in the whole material's microstructure.
Therefore, nanometre Al3(Sc1-x,Zrx) dispersoids continuously pin dislocations and cell boundaries with strain resulting in a larger reduction in conductivity in a much more effective way than in Al3Zr containing alloy.
Online since: April 2008
Authors: Sakiko Ukon, Yasuhito Tsujiie, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai
The data for the voltage of 3 kV are cited
from Ref. 23, and those for 4 kV were
obtained in the present work.
A similar phenomenon may occur in tellurite glasses when the poling is performed at a temperature close to Tg, leading to a reduction of the dc electric field induced in the depleted region.
It is naturally expected that the reduction of the induced dc electric field at high poling temperatures is facilitated when the voltage is increased, leading to a decrease in optimum poling temperature with an increase in the voltage.
(1) A least squares fitting of Eq.(1) to the experimental data results in a = 0.789 for 3 kV and a = 0.718 for 4 kV.
A similar phenomenon may occur in tellurite glasses when the poling is performed at a temperature close to Tg, leading to a reduction of the dc electric field induced in the depleted region.
It is naturally expected that the reduction of the induced dc electric field at high poling temperatures is facilitated when the voltage is increased, leading to a decrease in optimum poling temperature with an increase in the voltage.
(1) A least squares fitting of Eq.(1) to the experimental data results in a = 0.789 for 3 kV and a = 0.718 for 4 kV.
Online since: November 2005
Authors: Hitoshi Ishii, Jae Do Kwon, Yong Tak Bae, Sung Jong Choi, Young Suck Chai
Reduction of fatigue life due to fretting damage was also evaluated.
The speed of displacement controlled tension test was set to be 1 mm/min and a 50 mm Compositions, wt. % Ti Al V Fe O N 89 6.362 4.235 0.169 0.186 0.008 Stage 1 Air cooling 1050oC 980oC 2 hr Room temperature Air cooling Stage 2 540oC 4 hr Temperature Fig. 1 Heat treatment process of Ti-6Al-4V alloy (a) Rolled plate (b) 980o C AC, 540 o C AC (c) 1050 o C AC, 540o C AC 80 µm Fig. 2 Optical micrographs of heat treated Ti-6Al-4V alloy Table 1 Chemical compositions of Ti-6Al-4V alloy extensometer was applied to obtain the displacement data.
Microstructure 0.2% proof strength (Mpa) Tensile strength (Mpa) Strain (%) Reduction in area (%) Equiaxed 963 1003 22.5 31.7 Bimodal 982 1047 20.1 30.9 Lamellar 986 1048 5.4 12.3 Assessment of fretting fatigue limit of Ti-6A1-4V alloy.
The frequency of cyclic loading was set to be 1Hz up to 1000 cycles for stable data collection and then the frequency setting was changed into 15Hz thereafter at room temperature.
The speed of displacement controlled tension test was set to be 1 mm/min and a 50 mm Compositions, wt. % Ti Al V Fe O N 89 6.362 4.235 0.169 0.186 0.008 Stage 1 Air cooling 1050oC 980oC 2 hr Room temperature Air cooling Stage 2 540oC 4 hr Temperature Fig. 1 Heat treatment process of Ti-6Al-4V alloy (a) Rolled plate (b) 980o C AC, 540 o C AC (c) 1050 o C AC, 540o C AC 80 µm Fig. 2 Optical micrographs of heat treated Ti-6Al-4V alloy Table 1 Chemical compositions of Ti-6Al-4V alloy extensometer was applied to obtain the displacement data.
Microstructure 0.2% proof strength (Mpa) Tensile strength (Mpa) Strain (%) Reduction in area (%) Equiaxed 963 1003 22.5 31.7 Bimodal 982 1047 20.1 30.9 Lamellar 986 1048 5.4 12.3 Assessment of fretting fatigue limit of Ti-6A1-4V alloy.
The frequency of cyclic loading was set to be 1Hz up to 1000 cycles for stable data collection and then the frequency setting was changed into 15Hz thereafter at room temperature.
Online since: March 2019
Authors: Yoshiro Yamashita, Altan Bolag
SCE but no reduction peak was observed.
It shows that the fluorine introduction on para and meta position of the termini phenyl group shows little difference to UV and CV data.
For the parent compound DP, OTS-treatment of substrate surface also showed a decreased characteristic data compared with the HMDS-treated device [12].
Srivastava, Effect of reduction of trap charge carrier density in organic field effect transistors by surface treatment of dielectric layer, J.
It shows that the fluorine introduction on para and meta position of the termini phenyl group shows little difference to UV and CV data.
For the parent compound DP, OTS-treatment of substrate surface also showed a decreased characteristic data compared with the HMDS-treated device [12].
Srivastava, Effect of reduction of trap charge carrier density in organic field effect transistors by surface treatment of dielectric layer, J.
Online since: March 2016
Authors: Yuan Sheng Yang, Tao Zhang, Yun Teng Liu, Yang De Li, Wei Rong Li, Hong Min Jia, Xiaohui Feng
The reduction ratio was 81:1 as the inner diameter of extruder barrel is 125mm.
The tensile properties come from the average data of three tensile tests for each type of high-purity Mg.
The average value of mass loss data for each type of high-purity Mg come from 3 parallel specimens.
The improved YS of as-drawn Mg seems to be attributed to its refined grains based on the Hall-Petch relationship [23], while the reduction of EL should be responsible by the competitive result of grain refinement and work-hardening caused by the cold deformation, the former benefits to increases the ductility [9] while the latter reduces the EL due to the existence of the high-density dislocation[24].
The tensile properties come from the average data of three tensile tests for each type of high-purity Mg.
The average value of mass loss data for each type of high-purity Mg come from 3 parallel specimens.
The improved YS of as-drawn Mg seems to be attributed to its refined grains based on the Hall-Petch relationship [23], while the reduction of EL should be responsible by the competitive result of grain refinement and work-hardening caused by the cold deformation, the former benefits to increases the ductility [9] while the latter reduces the EL due to the existence of the high-density dislocation[24].