Search results

Attempts have been made to improve efficiency and productivity of such machines including the use of oscillating moulds[4], multistrand casting employing large teeming ladle together with improvement in cast product quality and cost reduction [5,6].
Advantages of modular design are numerous including greater flexibility, cost reduction and reduced learning time [10].
The caster is controlled by PLC and the input data for the control are fed through a control panel.

Each measuring point position and the measurement data are shown respectively in Fig.2 and Table 1 as below: Fig.2 The Position of Measuring Points Measuring Points Measuring Strain(με) Residual Stress(MPa) Rate of average reduction Rate of average decrease between adjacent points ε1 ε2 ε3 σ1 61% 85.56% before vibration 1 -47 -27 -22 58.3 2 -12 -201 694 -43.7 3 -174 -30 -14 201.2 4 -35 1072 -39 799.2 5 6 -15 -20 20.1 after vibration 1 -21 -31 -16 34.6 2 1 -126 -60 109.7 3 -106 -38 31 98.9 4 22 -2 -96 98.2 5 -20 -56 37 35.6 Tab.1 Residual Stress before and after Vibration Fig.3 Residual Stress before and after Vibration From Table 1, we can see that the welding residual stress for evaporator component is eliminated and smoother after implementing VSR with correct parameters.
[4] shugeru AOKI,Tadashi NISHIMURA,Tesumaro HIROI and Seiji HIRAI.Effect of Vibration with different Frequencies on Reduction of residual stress of welded joint[J].journal of solid Mechanics and Materials Engineering,Vol.2,No.4,2008

This work was focused on an evaluation of characteristics of surface laser hardening on contact and bending fatigue resistance of a 42CrMo4 steel, being often used for manufacture of gear wheels, with the aim to gain necessary experimental data, knowledge about damage mechanisms and to optimise the laser treatment technology and its parameters.
Firstly, reduction of fatigue limit corresponds to the notch concentration factor 1.8 in case of specimens with basic HT.
In case of laser longitudinal treatment, its effective value for fatigue limit reduction only is 1.35 indicating that some other phenomena are acting – compressive residual stresses.

The instrumentations used for the experiment are the impact hammer, accelerometer and LMS data acquisition.
The highest reduction of acceleration transmissibility occurred at frequency 450 Hz with 20 % of reduction.

From DSC data and ionic conductivity, it was assumed that P(EO)10LiTFSI had lower crystallinity than pure PEO.
R812(fumed-Silica) used as a filler enhanced the mechanical properties without the reduction of ionic conductivity.
But in the solid polymer electrolyte the reduction of capacity during operation was less than in liquid electrolyte.

It is worth pointing out that these Fe parameters, having been obtained by fitting the potential to data for Fe.
The reduction of friction force continues due to a reduction of the contact surface until the sliding component moves over a groove (sliding distance=7.6 nm, as shown by <2> in Fig. 3).

Moreover, the main structure of a caisson can be completed on land, resulting to a reduction of construction period.
Due to the reduction of buoyancy, the caisson will sink towards the seabed.
But it costs a lot and requires a high technique in current generation and data acquisition.

When increasing temperature, the reduction of βF can degrade the amplifier’s gain, hence lowering the comparator’s resolution.
The advantages are obtained at the cost of larger power dissipation, complexity, and reduction in bandwidth, which are not big concerns in this work.
Razavi, Principles of Data Conversion System Design.

The data was analyzed by using powersuit and fitted by origin8.0 software.
Beside the reduction above, there is no other redox process in the cyclic voltammetry curves.
The reduction and oxidation peaks are similar with the Na3AlF6-Al2O3 system.

By methanol crossover, the oxygen reduction reaction (ORR) and the methanol oxidation occur simultaneously in cathode.
Prior to H2 gas reduction, N2 gas was purged to prevent oxidation during 30 minutes.
Referring to the Joint Committee on Powder Diffraction Standards International Center for Diffraction Data (JCPDS-ICDD), the peaks of phases were identified.