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Online since: April 2018
Authors: Alin Constantin Murariu
Experimental Data
2.1 Material and methods
Spindle of the hydro-aggregate is made of T8NiCuMnCr130 steel which is a martensitic steel of 11 to 13% Cr.
Table 1 – Chemical composition [%] Steel Designation C Mn Si Cr Cu Ni Mo P S T8 MoNiCr125 Max. 0,08 Max. 1,50 Max. 1,00 11,5 – 13,5 - 3,5 – 5,0 Max. 1,0 Max. 0,030 Max. 0,035 X3 CrNiMo13-4 Max. 0,05 Max. 1,50 Max. 0,70 12,0 – 14,0 - 3,5 – 4,5 0,3 – 0,7 Max. 0,040 Max. 0,015 X1CrNiMoCu12-5-2 Max. 0,02 Max. 2,00 Max. 0,50 11,0 – 13,0 0,2 – 0,8 4,0 – 6,0 1,3 – 1,8 Max. 0,040 Max. 0,003 Table 2 – Mechanical characteristics (on longitudinal direction) Steel Designation Tensile Test Notch impact test Hardness test Yield Strength +20°C Rp0,2 [N/mm2] Tensile Strength +20°C Rm [N/mm2] Elongation after fracture A5 [%] Reduction in cross section at fracture Z [%] KCU3 [J/cm2] KV [J] HB HV T8 MoNiCr125 Min. 560 750 - 900 Min. 15 Min. 55 Min. 55 - 210 - 290 - X3 CrNiMo13-4 Min. 630 780 - 980 11 - 17 - - 50-70 Max. 320 - X1CrNiMoCu12-5-2 Min. 550 750 - 950 Min. 15 - - 100 Max. 300 In order to implement the experimental program consisting in non-destructive tests, mechanical
This aspect, corroborated by a low reduction in cross-section at fracture recorded for two specimens of 29% and respectively of 40%, below the limit of 55%, highlights as well that the local plasticity of this material is low.
Table 1 – Chemical composition [%] Steel Designation C Mn Si Cr Cu Ni Mo P S T8 MoNiCr125 Max. 0,08 Max. 1,50 Max. 1,00 11,5 – 13,5 - 3,5 – 5,0 Max. 1,0 Max. 0,030 Max. 0,035 X3 CrNiMo13-4 Max. 0,05 Max. 1,50 Max. 0,70 12,0 – 14,0 - 3,5 – 4,5 0,3 – 0,7 Max. 0,040 Max. 0,015 X1CrNiMoCu12-5-2 Max. 0,02 Max. 2,00 Max. 0,50 11,0 – 13,0 0,2 – 0,8 4,0 – 6,0 1,3 – 1,8 Max. 0,040 Max. 0,003 Table 2 – Mechanical characteristics (on longitudinal direction) Steel Designation Tensile Test Notch impact test Hardness test Yield Strength +20°C Rp0,2 [N/mm2] Tensile Strength +20°C Rm [N/mm2] Elongation after fracture A5 [%] Reduction in cross section at fracture Z [%] KCU3 [J/cm2] KV [J] HB HV T8 MoNiCr125 Min. 560 750 - 900 Min. 15 Min. 55 Min. 55 - 210 - 290 - X3 CrNiMo13-4 Min. 630 780 - 980 11 - 17 - - 50-70 Max. 320 - X1CrNiMoCu12-5-2 Min. 550 750 - 950 Min. 15 - - 100 Max. 300 In order to implement the experimental program consisting in non-destructive tests, mechanical
This aspect, corroborated by a low reduction in cross-section at fracture recorded for two specimens of 29% and respectively of 40%, below the limit of 55%, highlights as well that the local plasticity of this material is low.
Online since: September 2016
Authors: Arnaud Castel, Mahdi Babaee
Geopolymer binder can provide reduction of embodied CO2 of up to 80% compared to OPC by the efficient use of precursors, i.e. industrial by-products and alkaline solution.
The corrosion potential reduction is about -200 mV in average which is comparable to the potential drop criterion which is usually used to distinguish between the passive and active steel reinforcements in Portland cement concrete.
But, Rp values measured on passive specimens (the data point at time 0) are lower than expected according to Andrade and Alonso (1996) recommendations (i.e.
The corrosion potential reduction is about -200 mV in average which is comparable to the potential drop criterion which is usually used to distinguish between the passive and active steel reinforcements in Portland cement concrete.
But, Rp values measured on passive specimens (the data point at time 0) are lower than expected according to Andrade and Alonso (1996) recommendations (i.e.
Online since: February 2013
Authors: Xiang Hong Liu, Yong Zhao, Hiroshi Kumakura, Akiyoshi Mastumoto, Guo Yan, Xi Feng Pan, Yong Feng, Ping Xiang Zhang
In our previous results, a little of C impurities, originated from the decomposition of the residual toluene during the toluene treatment boron process, was found at the imporous MgB2 and may be important to reduction of the pores; however, the detailed influence of the residual toluene content on the porosity, flux pinning and Jc of MgB2 is still unclear.
Table 1 Data of residual toluene content, mass density, porosity, MgO content, Tc, Birr at 20K and Jc at 10K and 6 T for all the MgB2 samples.
High heat treatment temperature also benefits the reduction of pores.
Table 1 Data of residual toluene content, mass density, porosity, MgO content, Tc, Birr at 20K and Jc at 10K and 6 T for all the MgB2 samples.
High heat treatment temperature also benefits the reduction of pores.
Online since: May 2022
Authors: Mnerie Dumitru, Gabriela-Victoria Mnerie, Vasile Nagy, Safta Voicu-Ioan
. – Microscopic images from the characteristic areas of the welded joints
BM
HAZ
W
1.1
x 200
1.2
x 200
2.1
x 200
2.2
x 200
2.3
x 200
3.1
x 200
3.2
x 200
3.3
x 200
3.4
x 200
Results
Following the completion of the full welded sample analysis program, some detailed interpretations of the data presented in Tables 1 and 2 are considered necessary.
It was also noted a reduction in the specific bilateral corner joint time (1.1).
Conclusions Corroborating the obtained results, it can be stated that, in the case of TIG welding, by pulsing the electric arc, important savings are also obtained, both regarding the energy consumption and the reduction of the related costs.
It was also noted a reduction in the specific bilateral corner joint time (1.1).
Conclusions Corroborating the obtained results, it can be stated that, in the case of TIG welding, by pulsing the electric arc, important savings are also obtained, both regarding the energy consumption and the reduction of the related costs.
Online since: February 2012
Authors: Yu De Dong, Ling Lan Wang, Ting Zhao Li, Yi Kui Yang, Cai Yun Liu, Yong Jun Liu
Developing automobile lightening technology is a trend of the automobile industry, which is an important way for reduction of automobile oil consumption, energy saving and emission reduction.
The datum of the original structure and the modified structure are showed in Table 2.
Table 2 Datum of the original structure and the modified structure Structure Material Weight [kg] Rate of weight reduced Yield strength [MPa] Maximum displacement [mm] Maximum stress [MPa] Minimum safety factor Original ZG270-500 16.8 23.2% 270 0.06 153.0 1.76 Modified ZG270-500 12.9 270 0.07 170.6 1.58 Being modified once again, the weight of support structure showed in Fig. 6 is reduced 23.2%, heavier than the structure showed in Fig. 5.
The datum of the original structure and the modified structure are showed in Table 2.
Table 2 Datum of the original structure and the modified structure Structure Material Weight [kg] Rate of weight reduced Yield strength [MPa] Maximum displacement [mm] Maximum stress [MPa] Minimum safety factor Original ZG270-500 16.8 23.2% 270 0.06 153.0 1.76 Modified ZG270-500 12.9 270 0.07 170.6 1.58 Being modified once again, the weight of support structure showed in Fig. 6 is reduced 23.2%, heavier than the structure showed in Fig. 5.
Online since: October 2008
Authors: Yeong Ae Heo, Guo Wei Zhang, Sashi K. Kunnath, Yan Xiao
The key features of reinforcing steel are illustrated in this paper through
conceptual diagrams and experimental data.
The degree of the reduction of elastic ranges and the growth of the curvature [5] varies as a function of the accumulated plastic strain.
In other words, the larger deterioration inside the material influences the reduction of the elastic range (yield surface) and also the growth of curvature depending on the accumulated plastic strain, which results in strain hardening upon loading as shown in the Fig. 5a and strain softening during the reversed loading.
The degree of the reduction of elastic ranges and the growth of the curvature [5] varies as a function of the accumulated plastic strain.
In other words, the larger deterioration inside the material influences the reduction of the elastic range (yield surface) and also the growth of curvature depending on the accumulated plastic strain, which results in strain hardening upon loading as shown in the Fig. 5a and strain softening during the reversed loading.
Online since: July 2008
Authors: Laurent Langlois, Eric Becker, Véronique Favier, Jean Christophe Pierret, Pierre Cezard, Régis Bigot
It consists in a diameter
reduction from 40mm to 12mm.
The Vickers hardness reduction at the points 13 and 14 illustrates a low cooling speed after the forming (the cooling is made into the dies) or a chemical gradient of the slug.
Influence of different thixoforging parameters on C38 steel mechanical characteristic Speed [mm/s] T°die/T°sl ug [°C] Rp0,2* [N/mm 2] Rm* [N/mm 2] Rp/Rm A% 50 30/1420 537 818 0,66 18,9 50 400/1429 457 756 0,60 21,0 200 30/1420 504 800 0,63 20,7 200 400/1429 458 765 0,60 16,0 Steel data from C38 ≥ 430 650 to 800 ≥ 16 2.
The Vickers hardness reduction at the points 13 and 14 illustrates a low cooling speed after the forming (the cooling is made into the dies) or a chemical gradient of the slug.
Influence of different thixoforging parameters on C38 steel mechanical characteristic Speed [mm/s] T°die/T°sl ug [°C] Rp0,2* [N/mm 2] Rm* [N/mm 2] Rp/Rm A% 50 30/1420 537 818 0,66 18,9 50 400/1429 457 756 0,60 21,0 200 30/1420 504 800 0,63 20,7 200 400/1429 458 765 0,60 16,0 Steel data from C38 ≥ 430 650 to 800 ≥ 16 2.
Online since: January 2009
Authors: Zhong Zi Xu, Chun Hua Lu, Hai Rong Huang, Jun Kai Xue, Ya Ru Ni
A study of Ti-based implants demonstrated a reduction of ion
dissolution by aging of the surface oxide or by thermal oxidation [18].
Statistical Analysis For any given experiment, each data point is represented as the mean ± standard deviation of the mean of all replicate samples.
However, significant reductions in thrombogenicity were observed for ZO and NTO surfaces compared to TO and NT.
Statistical Analysis For any given experiment, each data point is represented as the mean ± standard deviation of the mean of all replicate samples.
However, significant reductions in thrombogenicity were observed for ZO and NTO surfaces compared to TO and NT.
Online since: November 2011
Authors: Jian Xin Xu, Jian Jun Wang, Shi Bo Wang, Hua Wang, Dao Fei Zhu, Guo Feng Fan
CFD Simulation of Mixing Effects in Gas-liquid-solid Stirred Reactor
Jianxin Xu1,Hua Wang2,a,Jianjun Wang3, Shibo Wang4, Daofei Zhu5 and Guofeng Fan6
1,2,3Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction Ministry of Education, Kunming University of Science and Technology, CHINA.
4,5,6Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming, China
aEmail: wanghuaheat@hotmail.com
Keywords: stirred reactor; mixing time; numerical simulation; betti numbers; gas-liquid-solid
Abstract.
In the recent years, Computational Fluid Dynamics (CFD) simulation technology has become eminent in the multi-phase mixing in simulate stirred tank due to the fact that numerical simulation avoids a large amount of repeat test which can not only reduce the test cost, but also obtain the data not available in the on-spot test.
Establishment and solution of mathematical modeling Research on ZnO reduction by CH-4 to generate synthetic gas and Zn in the molten salt system is basic and concerns with gas-liquid-solid three phase flow reaction.
In the recent years, Computational Fluid Dynamics (CFD) simulation technology has become eminent in the multi-phase mixing in simulate stirred tank due to the fact that numerical simulation avoids a large amount of repeat test which can not only reduce the test cost, but also obtain the data not available in the on-spot test.
Establishment and solution of mathematical modeling Research on ZnO reduction by CH-4 to generate synthetic gas and Zn in the molten salt system is basic and concerns with gas-liquid-solid three phase flow reaction.
Online since: October 2007
Authors: Yuichi Ikuhara, Takahisa Yamamoto, S.Y. Choi, Naoya Shibata, Yukio Sato, Teruyasu Mizoguchi
The reduction
of the apparent resistivity operates as an effective current pass to protect electric circuits under
unexpected high external voltage.
In the figure, the data obtained from Σ1 boundary is also shown for comparison.
Reduction of the cooling rate increases the resistance of the grain boundary and the non-linearity of I-V as seen in the figure.
In the figure, the data obtained from Σ1 boundary is also shown for comparison.
Reduction of the cooling rate increases the resistance of the grain boundary and the non-linearity of I-V as seen in the figure.