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Online since: July 2013
Authors: Denise Morrey, Allan Hutchinson, Patricia H. Winfield
The use of (CFAs) within the bulk of an adhesive or primer to induce a one–off disbond has been investigated to show that the effective expansion of a cured adhesive will result in a reduction of bonded joint strength [10].
Data for PFAs used.
However, joints made with Betamate XD4600 exhibited a drastic 90% loss of strength; we think this reduction can be directly linked to a significant change in the adhesive’s internal structure.
The presence of PFAs in an epoxy adhesive bondline can result in a severe reduction in joint performance.
Data for PFAs used.
However, joints made with Betamate XD4600 exhibited a drastic 90% loss of strength; we think this reduction can be directly linked to a significant change in the adhesive’s internal structure.
The presence of PFAs in an epoxy adhesive bondline can result in a severe reduction in joint performance.
Online since: February 2013
Authors: Shao Yi Hsia, Shiuh Kuang Yang, Jyin Wen Cheng
From the above experiments, both ratios appear better sugar reduction rate.
Nevertheless, the sugar production at the third hour and the ratio 1:3 could not be obtained, the effects of different ratios of bacterial solution-to-Bagasse broth on sugar reduction and the change of sugar production at two hour should be further discussed.
When the ratio of bacterial solution-to-Bagasse broth is 1:6, the sugar production is stably increased, comparing to other groups, and the reduced sugar achieves the maximum at the third hour, with the sugar reduction rate 13.77% and the increasing sugar 0.034 mg/ml.
According to the experimental data, the ratio 1:6 for the bacterial solution-to-Bagasse broth and the cultivation period being 3 hours appear the maximum sugar production rate.
Nevertheless, the sugar production at the third hour and the ratio 1:3 could not be obtained, the effects of different ratios of bacterial solution-to-Bagasse broth on sugar reduction and the change of sugar production at two hour should be further discussed.
When the ratio of bacterial solution-to-Bagasse broth is 1:6, the sugar production is stably increased, comparing to other groups, and the reduced sugar achieves the maximum at the third hour, with the sugar reduction rate 13.77% and the increasing sugar 0.034 mg/ml.
According to the experimental data, the ratio 1:6 for the bacterial solution-to-Bagasse broth and the cultivation period being 3 hours appear the maximum sugar production rate.
Online since: July 2008
Authors: Antonio Forn, Maite T. Baile, Elisa Rupérez, Isabel Espinosa
Unexpectedly
A356 T6 anodized achieves a significant reduction in friction coefficient values and improves the
material wear resistance under lubricated conditions compared with A6061 T6 anodized (Fig 4 a).
The shape of the polarization curves is similar too: a plateau on the cathodic branch controlling the corrosion process may be associated with an oxygen reduction mechanism.
Parameters obtained from impedance data for tested specimens The corrosion resistance is relative to the Rp value: A6061 T6 Rp > A356 T6 Rp.
Anodizing A356 T6 aluminium alloy achieves a significant reduction in friction coefficient values and improves the material wear resistance under lubricate conditions.
The shape of the polarization curves is similar too: a plateau on the cathodic branch controlling the corrosion process may be associated with an oxygen reduction mechanism.
Parameters obtained from impedance data for tested specimens The corrosion resistance is relative to the Rp value: A6061 T6 Rp > A356 T6 Rp.
Anodizing A356 T6 aluminium alloy achieves a significant reduction in friction coefficient values and improves the material wear resistance under lubricate conditions.
Online since: July 2006
Authors: Dimitrios Tsivoulas, Joseph D. Robson
The need for cost reduction due to the high price of scandium has led to the development of dilute
Al-Sc alloys.
Such networks (Fig. 2) are three-dimensional and are believed to result from a reduction in elastic strain energy caused by the reduction in the lattice misfit [21].
The comments on coherency were correlated to the average radius data reported elsewhere [22].
Such networks (Fig. 2) are three-dimensional and are believed to result from a reduction in elastic strain energy caused by the reduction in the lattice misfit [21].
The comments on coherency were correlated to the average radius data reported elsewhere [22].
Online since: October 2020
Authors: Berend Denkena, Marc André Dittrich, Florian Schaper, Sebastian Worpenberg, Jonas Matthies, Alexander Krödel
Investigations on the oxidation of chips during machining by injection of nitrogen into a closed working chamber could not contribute to a reduction in oxidation despite atmospheric oxygen content of 3 % [14].
Table 1: Composition wt% of Grade 5 Ti-6Al-4V Al C Fe N O V H Ti 5.5 – 6.75 0.1 0.3 0.05 0.2 3.5 – 4.5 0.015 Balance Table 2: Coating specifications after Wolf Coatings GmbH data sheet Coating TiN TiAlN CrAlN Micro hardness HV 0.05 2700 3400 3500 Friction coefficient [-] dry, against steel 0.3 0.4 0.4 Thickness [µm] 0.9 3.2 2.7 Aprox.
However, a reduction of the oxygen content in the atmosphere leads to an increase in tool life for the TiN and TiAlN coated tools.
One reason for the increase in tool life can be the reduction in coating oxidation.
Table 1: Composition wt% of Grade 5 Ti-6Al-4V Al C Fe N O V H Ti 5.5 – 6.75 0.1 0.3 0.05 0.2 3.5 – 4.5 0.015 Balance Table 2: Coating specifications after Wolf Coatings GmbH data sheet Coating TiN TiAlN CrAlN Micro hardness HV 0.05 2700 3400 3500 Friction coefficient [-] dry, against steel 0.3 0.4 0.4 Thickness [µm] 0.9 3.2 2.7 Aprox.
However, a reduction of the oxygen content in the atmosphere leads to an increase in tool life for the TiN and TiAlN coated tools.
One reason for the increase in tool life can be the reduction in coating oxidation.
Online since: January 2016
Authors: Monika Pavčeková, Rastislav Menďan
Introduction
The energy need for heating and mostly its reduction for the purpose of energy savings and environmental protection is very often discussed nowadays.
Heat losses are thus one of the input data for determination of energy need for heating.
The improving thermal-insulation properties of envelope constructions generally affect the reduction of energy need for heating.
As for overall impact of the renewal and reduction of the influence of thermal bridges on energy need for heating, the greatest savings, i.e. almost 65 % was achieved in fourth and fifth variant of renewal of the family house in comparison to the original state.
Heat losses are thus one of the input data for determination of energy need for heating.
The improving thermal-insulation properties of envelope constructions generally affect the reduction of energy need for heating.
As for overall impact of the renewal and reduction of the influence of thermal bridges on energy need for heating, the greatest savings, i.e. almost 65 % was achieved in fourth and fifth variant of renewal of the family house in comparison to the original state.
Online since: October 2007
Authors: Sergei Ya. Betsofen, V.I. Slavov, N.A. Popkova
Thus, rolling with deformation finish in this area
which ensure significant size reduction of steel structure leads to rise of impact toughness, decrease
of fragility critical temperature and a small strength increase.
Hot rolling in ferrite-pearlite area causes a sharp rise of grain oblongness without appreciable size reduction.
Pole density P(hkl) of different texture components depending on TFR (inverse pole figures method) 0 5 10 15 20 25 30 500 600 700 800 900 0 1 2 3 4 0 5 10 15 20 25 30 500 600 700 800 900 0 1 2 3 4 0 5 10 15 20 25 30 500 600 700 800 900 0 1 2 3 4 d |||| |||| / d⊥⊥⊥⊥ 2 1 3 2 1 3 2 1 3 TFR, °°°°C TFR, °°°°C TFR, °°°°C Steel 1 Steel 3 Steel 2 d, µµµµm 0 0,05 0,1 0,15 0,2 0,25 0,3 0,35 500 600 700 800 900 0 1 2 3 4 5 6 7 8 9 500 600 700 800 900 ∆∆∆∆а/а ⋅⋅⋅⋅10-4 1 3 2 D, µµµµm 1 3 2 TFR, °°°°C TFR, °°°°C 0 1 2 3 4 5 500 600 700 800 900 222 200 112 310 220 0 1 2 3 4 5 500 600 700 800 900 220 310 112 200 222 0 1 2 3 4 5 500 600 700 800 900 220 310 112 200 222 Phkl TFR, °°°°C TFR, °°°°C TFR, °°°°C Steel 1 Steel 2 Steel 3 reduction to controlled rolling mode (730-700 0С): it is insignificant in low-alloy steel, in alloyed steels more steeply (P(100)=2.8-3.8
For manufacturing of straight-seam big diameter pipes for which the data on mechanical tests in transverse direction is important, hot rolling is better be finished within twophase area (ТFR = 730-750 0С).
Hot rolling in ferrite-pearlite area causes a sharp rise of grain oblongness without appreciable size reduction.
Pole density P(hkl) of different texture components depending on TFR (inverse pole figures method) 0 5 10 15 20 25 30 500 600 700 800 900 0 1 2 3 4 0 5 10 15 20 25 30 500 600 700 800 900 0 1 2 3 4 0 5 10 15 20 25 30 500 600 700 800 900 0 1 2 3 4 d |||| |||| / d⊥⊥⊥⊥ 2 1 3 2 1 3 2 1 3 TFR, °°°°C TFR, °°°°C TFR, °°°°C Steel 1 Steel 3 Steel 2 d, µµµµm 0 0,05 0,1 0,15 0,2 0,25 0,3 0,35 500 600 700 800 900 0 1 2 3 4 5 6 7 8 9 500 600 700 800 900 ∆∆∆∆а/а ⋅⋅⋅⋅10-4 1 3 2 D, µµµµm 1 3 2 TFR, °°°°C TFR, °°°°C 0 1 2 3 4 5 500 600 700 800 900 222 200 112 310 220 0 1 2 3 4 5 500 600 700 800 900 220 310 112 200 222 0 1 2 3 4 5 500 600 700 800 900 220 310 112 200 222 Phkl TFR, °°°°C TFR, °°°°C TFR, °°°°C Steel 1 Steel 2 Steel 3 reduction to controlled rolling mode (730-700 0С): it is insignificant in low-alloy steel, in alloyed steels more steeply (P(100)=2.8-3.8
For manufacturing of straight-seam big diameter pipes for which the data on mechanical tests in transverse direction is important, hot rolling is better be finished within twophase area (ТFR = 730-750 0С).
Online since: March 2007
Authors: Yu Cheng Fang, Xi Yu Luo, Xiang Yang Li
Preparation and fundamental characteristics of pre-alloyed powders
Pre-alloyed powders for diamond tools are prepared by chemical co-precipitation
reduction and water atomization.
The fundamental characteristics of pre-alloyed powders Symbol of powders Major component density g/cm3 Reduction temperature [;] Content of Oxygen [wt%] Loose density [g/cm3] Average particle diameter d50, [µm] 04 Fe base 8.03 620�640 0.38 3.4 17.8 05 Fe base 8.15 620�640 0.29 2.9 18.3 06 Cu base 8.72 600�620 0.24 2.6 15.3 A Cu�Co 8.48 � 1.07 ; 1.1�1.6; 4.95 B Cu�Co 8.75 � 1.04 ; 1.0�1.5; 4.45 C Fe�Co 8.05 � 0.39 2.16 13.97 EFCo 100%Co 8.9 400�420 0.28 0.9 �1.0 ; is from the references, and the others are experimental data by author.
Compactibility of powders is practical and less than that of electrolysis powders, reduction powders and chemical reaction powders. 6 �� �� �� �� �� relative density �%� �� �� �� �� � mass loss % Compressibility Simulation compactibility Figure5 Briquettability of 04 and 05 powder Weldability of 04, 05 and 06 powders is examined.
The fundamental characteristics of pre-alloyed powders Symbol of powders Major component density g/cm3 Reduction temperature [;] Content of Oxygen [wt%] Loose density [g/cm3] Average particle diameter d50, [µm] 04 Fe base 8.03 620�640 0.38 3.4 17.8 05 Fe base 8.15 620�640 0.29 2.9 18.3 06 Cu base 8.72 600�620 0.24 2.6 15.3 A Cu�Co 8.48 � 1.07 ; 1.1�1.6; 4.95 B Cu�Co 8.75 � 1.04 ; 1.0�1.5; 4.45 C Fe�Co 8.05 � 0.39 2.16 13.97 EFCo 100%Co 8.9 400�420 0.28 0.9 �1.0 ; is from the references, and the others are experimental data by author.
Compactibility of powders is practical and less than that of electrolysis powders, reduction powders and chemical reaction powders. 6 �� �� �� �� �� relative density �%� �� �� �� �� � mass loss % Compressibility Simulation compactibility Figure5 Briquettability of 04 and 05 powder Weldability of 04, 05 and 06 powders is examined.
Online since: March 2015
Authors: Joost R. Duflou, Jef Vleugels, Dimos Paraskevas, Wim Dewulf, Kim Vanmeensel
Figure 2 present the process cycle and the evolution of temperature, load, shrinkage rate and relative density of the sample versus time based on the measured data.
This reduction was mainly due to the use of a higher heating rate used during the second step and due to water quenching of the sample instead of a constant cooling and releasing pressure step.
Further reduction of the process time can be achieved by eliminating the vacuum creation step and by further increasing the heating rate.
Cullen, Assessing the potential of yield improvements, through process scrap reduction, for energy and CO2 abatement in the steel and aluminium sectors, Resour.
This reduction was mainly due to the use of a higher heating rate used during the second step and due to water quenching of the sample instead of a constant cooling and releasing pressure step.
Further reduction of the process time can be achieved by eliminating the vacuum creation step and by further increasing the heating rate.
Cullen, Assessing the potential of yield improvements, through process scrap reduction, for energy and CO2 abatement in the steel and aluminium sectors, Resour.
Online since: July 2012
Authors: Jun Qin Li, X.X. Li, S.P. Li, L. Wang, F.S. Liu, W.Q. Ao
The ball milling and short sintering time lead to the samples containing more grain-boundaries which certainly benefit to the reduction of the thermal conductivity.
The reduction of the lattice thermal conductivity leads to the reduction of the total thermal conductivity.
The figures of merit (ZT) for the samples Pb1-xAgxSe (x = 0, 0.002, 0.004 and 0.008) can be calculated by the equation ZT = S2σT/κ, using the data shown above in the investigated temperature range.
The reduction of the lattice thermal conductivity leads to the reduction of the total thermal conductivity.
The figures of merit (ZT) for the samples Pb1-xAgxSe (x = 0, 0.002, 0.004 and 0.008) can be calculated by the equation ZT = S2σT/κ, using the data shown above in the investigated temperature range.