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Online since: May 2014
Authors: Shinji Yaoita, Takehiko Watanabe, Tomohiro Sasaki, Kengo Kaiwa
However, to the authors’ knowledge, there are no experimental data of the effect of Ni and Co additions to filler metals on the dissimilar joints of cemented carbide and steel.
The joint strength of the brazed joints was decreased in spite of the reduction of the Co-depleted zone, it is considered that the decrease in average hardness of brazed layer predominantly affects to the joint strength.
However, in multiple additions, the joint strength of the brazed joints was decreased in spite of the reduction of the Co-depleted zone.
Online since: October 2016
Authors: Tomonori Mukai, Akira Yanagida, Hironori Sasaki
Introduction Hot stamping process has been developed to produce the steel automobile parts with an ultra-high-strength of 1500 MPa for improving crash safety and weight reduction.
The hot stamping needs the data of many process parameters such as, the thermo-mechanical and metallurgical interaction and their influence on the formability.
It is supposed that the small surface expansion leads to reduction of an expose of the base metal even under thin scale thickness and the fine fragment made of thin scale thickness can act as a lubricant effectively.
Online since: July 2017
Authors: I.P. Popov, E.G. Demyanenko
Fig. 2 – Sample preparation for the microstructure analysis of the welding area On Fig, 4 etched structure of solid solution of alloying elements in aluminum, and disperse phases are presented. 1 melt 2 melt 50 μm 3 melt 50 μm 4 melt Fig 4 – Microstructure of the welding area of the samples, obtained with exposure to pulsed magnetic field (PMF) (Etched, Magnification 360) 1 melt 2 melt 50 μm 3 melt 50 μm 4 melt Fig. 5 – Microstructure of the welding area of the samples, obtained with exposure to weak pulsed current (WPC) (Etched, Magnification 400) Their distribution is uniform through the thickness of the microsection, preferential orientation and alignment of inclusions are parallel to the sides of the section, which is typical characteristic of aluminum alloys deformed to large degrees of reduction during rolling.
Table 2 – Phase composition of the alloys № of melt Nanoparticle phases 1 2 3 4 5 1 Al6(MnFe) Al6Mn Al3Zr Al12Mn2Cu Al3(ZrSc) AlB2; AlB12 2 Mg2Si AlFeSi Al3Sc AlB2; AlB12 3 Mg2Si AlFeSi Al2Cu Al3Sc AlB2; AlB12 4 Al6(MnFe) Al6Mn Al3Zr Al3Sc Al2Cu Al2MgCu Al12Mn2 After scoping various literature sources we couldn’t manage to encounter any data on comparisons of physical impact of weak pulsed current (WPC) and pulsed magnetic fields (PMF) on the samples of conductor aluminum alloys.
The results indicate reduction of the size of the grains, increase of plasticity and approach of properties of the welding seam to those of base metal.
Online since: June 2003
Authors: Waleran Arabczyk, R. Wróbel
The thermal reduction of iron oxides proceeds during this process.
A constant sample mass was assumed as the end of the reduction process.
The data shown were obtained for the reactions of oxidation and carburization of fraction A.
Online since: March 2013
Authors: Guo Qin Gao, Xue Mei Niu, Hai Yan Zhou
Real-time data acquisition can be done by using the control card and high-precision motion control can be achieved by adopting sliding mode control algorithm.
Controller parameters are the same as above and the structural parameters of the mobile robot are chosen as follows, the reduction ratio of gearbox i=33:1, R=210mm, L=410mm.
Reduction of Control Torques of Mobile Robot Using Hybrid Nonlinear Position Controller.
Online since: November 2015
Authors: F. Abdullah Sultan, R. Panneer
Preheating Titanium helps in substantially increasing the tool life and improving machinability [3].The principle behind Pre-heating is increasing the difference in hardness between cutting tool and work piece thereby leading to a reduction in the component forces, improved surface finish and longer tool life.
M.Nouari and H.Makich [8] have stated in their research work that a reduction of cutting forces is noticed when the cutting speed increases, owing to the thermal softening of the material caused due to the temperature rise applied externally.
Taguchi has created a transformation of the repetition data to another value which is a response measure of the variation present which is known as signal-to-noise ratio(S/N) presented in Table 3.
Online since: September 2016
Authors: N.S. Klochkov, Irina K. Zabrodina, U.P. Egorov, Carlo Mapelli
Adding of the alloying components leads to reduction of plasticity of alloys.
The obtained data indicate the reduction of resistance to fragile destruction at increase of tin proportion in bronze.
Online since: November 2016
Authors: Chul Ho Lee, Chihiro Sekine, Hirotaka Kato, Yukihiro Kawamura
Therefore, a large reduction of κL is expected owing to random motion (rattling) of guest ions located inside the cages.
The lattice constant determined by a least-squares fit to the data was 9.0714 Å.
The large reduction in κL suggests that significant rattling effect by several kinds of atoms included in Mm.
Online since: August 2014
Authors: Zhen Zhong Shen, Bai Song Nie, Lei Yang, Ning Wang, Li Qun Xu
The drilling hole and adit data show the average thickness of the deformation body is 41m, the maximum thickness is 66m and the total volume is 220×104m3.
Based on strength reduction method, the slope stability safety factors are calculated under natural condition, flood condition and earthquake condition.
Based on strength reduction method, the slope stability safety factors are calculated under natural condition, flood condition and earthquake condition.
Online since: November 2016
Authors: Igor Mazur, Evgeniy Panin, Sergey Lezhnev, Abdrakhman B. Naizabekov
In this case, along with the deformation in the longitudinal direction, which is characteristic for rolling on thick-sheet and wide-strip mills, there are conditions for deformation of the metal in the transverse direction, which has a positive effect on the reduction of anisotropy of properties.
Rolling in the relief rolls with the unequal relation of the protrusion to the depression was carried out in five passes with a reduction in each pass ∆h=0.6 mm.
Table 1 – Hardness values of samples of brass B63 Material Treatment Vickers hardness, HV Brass B63 Annealing 87,25 Rolling in smooth rolls 172,54 Rolling in relief rolls 193,16 Conclusions The combined analysis of new and previously obtained data demonstrates the advantage of the relief rolls before smooth in terms of obtaining isotropic grain structure of rolled metal, and hence that the quality of rolled plates is increased.
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