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Online since: February 2014
Authors: Nowshad Amin, Nurul Huda Abdul Razak
Compared to the conventional texturing method, laser texturization is much more independent on grains crystallographic orientation.
The Nd:YAG laser system working process is very slow because the movement of the laser is already set at certain number.
Online since: June 2012
Authors: Zhi Guo Gao, Yi Sheng Zhao, Xin Ming Zhang
A large number of experiments are usually required to build up a complete CCT diagram.
It is well known that the addition of Ce in bearing-B steels is a usual practice for preventing B segregation on the grain boundary and increasing solute B content.
Online since: May 2013
Authors: Rostislav Drochytka, Lenka Mészárosová
The bulk density decreases with an increase number of air pores in the structure.
The particles have to be flake-shaped and must not contain any lumps or spherical grains.
Online since: January 2013
Authors: Ji Chao Jiang, Xiu Yan Luo
Cu tends to segregate at grain boundary and improves the plasticity of high entropy alloy [6-9].
The oxide of Ti,Ni accreting on Al2O3 form needlelike and large numbers of needlelike oxides accumulate.
Online since: September 2013
Authors: Xiao Mei Li, Jing Jing Yu, Jin Yu
Fig. 1(a) shows that there are a number of phases appearing in the alloy, namely, η, T, S and Fe containing phases, whilst in Fig. 1(b) the major phase is η, T and S phases are not present.
Optical microstructural examination, as shown in Fig. 2, reveals a pancake shape grain structure for alloy A1.
Online since: June 2017
Authors: Victoriya Petropavlovskaya, Kirill Petropavlovskii, Аleksandr F. Buryanov, Tatiana B. Novichenkova
It is explained by a number of their properties: low heat conductivity, high soundproofing ability, technological effectiveness, safety [1].
Ettringite fills the grains, does not cause harmful tension, at the same time the block of the hardening of the disperse system is under construction.
Online since: January 2005
Authors: S.W. Du, R.V. Ramanujan
The primary exothermic peak corresponds to a nucleation and grain growth process from amorphous phase to crystallized phase.
The second peak indicates a second phase transformation. 300 400 500 600 700 (c) (b) (a) DSC Temperature ( oC) In the Kissinger analysis of a nucleation-and-growth process the activation energy of the rate constant is determined by plotting, for a number of scans at different rates b, ln(b/Tp2) vs (1/Tp), where Tp is the peak temperature (maximum rate) of the transformation.
Online since: May 2003
Authors: Udo Mücke, Georg Berger, Karl-Wolfram Harbich
Mixtures of carbonates and phosphates were melted at 1550°C in platinum crucible, cast yielding the glass-ceramics GB14 and ground up to a mean grain size of ~4 µm (D50) in an achate mill (Pulverisette 5, Fritsch Inc., Germany; Master Sizer S, Malvern Instr.
Furthermore, a large number of intercrystalline microcracks and pore structures was found causing additional high internal surface properties.
Online since: June 2014
Authors: Hong Cai Yang, Ming Qing Wu
Fig. 6 Blank shape and size 3.2 the engine oil pan stretch the results of simulation analysis According to the tensile process parameters are given, the engine oil pan for finite element simulation, a tensile stretch when the blank-holder force from 10 MPa, the coefficient of friction is 0.11, die fillet radius of 30 mm, similar set of boundary conditions and the square box, finally the simulation results are as follows Can be seen from the figure7, the long tail part of the engine oil pan under the effect of blank holder force, little flow, this will surely cause great tensile connected to the side wall of the resistance, leading to the sidewall fracture, it can be seen from the forming limit diagram, quite a number of units in molding danger zone, essentially sheet metal has been broken.
Based on DEFORM 3 d simulation of the grain size of 7050 aluminium alloy profile extrusion process study [J].
Online since: October 2007
Authors: Wen Zhen Li, Jun Jiao Wu
A pattern layout shown in Fig. 2 has been calculated, in which the alphabet and number show the measured points.
During the compacting process, the friction force between sand grains and flask wall should be considered in numerical simulation.
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