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Online since: July 2007
Authors: Paul R. Dawson, Donald E. Boyce, Jae Hyung Cho
Strong textures persist even if dynamic recrystallization occurs, and shear textures of dynamically recrystallized grains have been observed in the weld zone [1].
Texture evolution has been calculated for the shown positions, numbered from 1 to 8 (bottom and top parts).
Each number specifies a position in the outlet where the textures are calculated.
Online since: May 2012
Authors: Muhammad Shuaib, M. Siddiq, H. Nawaz, S. Aftab
Furthermore, the grain size of the calcined ceramic is 30 microns and the individual particle size is of the order of 30nm.
AcAc expands the coordination number of the two transition metals by forming mono and dichelated complexes of octahedral geometry [14] The addition of water to the solution in acidic atmosphere hydrolyzes the OPri ligands whereas AcAc ligands are partially hydrolyzed.
XRD spectra of the samples heat treated at different temperatures from 200 - 550 °C All the XRD peaks correspond to the tetragonal structure (JCPDS file number. 33–784).
Online since: November 2012
Authors: Ji Wei Deng, Chang Wu Liu, Ze Hui Chen
Table 1 Different dimensions da-qing limestone rock sample mechanical parameters Rock number D[mm] L[mm] L/D [MPa] [10-3] E[GPa] T05 87.36 62.48 0.715 31.08 1.71 20.1 T12 90.11 86.86 0.964 28.06 5.63 5.1 T08 120.13 62.74 0.522 32.48 6.17 19.1 T09 120.15 62.85 0.523 29.28 3.17 9.7 T11 134.75 86 0.638 28.31 1.3 22.3 According to the test result, drawing a scatter diagram about relation between compressive strength and size, As shown in Figure 1.
Fig.3 Diagram of the different length of rock breaking Theory Model of Size Effect of Rock Material The earliest relationship between the average intensity and scale of rock specimen is raised by J C Jaeger, N G W Cook who performs a large number of experiments, as shown in Eq.1: (1) In the equation: is the volume of rock sample, is constant concerned with rock material.
Probability model of defect distributions for boundary of rock Grain [J].
Online since: January 2019
Authors: Yi Han Zhou
In the case of leather, mold can cause mildew on the surface of the leather, leaving the grain of the leather tarnished.
From 11 h, as the heating time increases, the number of silver particles increases gradually.
Fig. 4 shows (1) nano silver sphere particles; (2) silver particles and silver lines containing a large number of cubic silver blocks; (3) silver wires with larger diameters; and (4) silver wires with small diameters.
Online since: October 2016
Authors: S.C. Prasanna, C. Ramesh, R. Manivel, A. Manikandan
There are number of Al-alloys among which Al6061 alloy are used in the various application like Aircraft and aerospace component, Marine fittings, Transport, Bicycle frames, Drive shafts, Brake components and Electrical fittings and connectors and also have superior properties like Good surface finish, Good corrosion resistance to sea water, Good workability, Excellent corrosion resistance to atmospheric conditions and Good toughness.
There are number of materials such as SiC, Al2O3, B4C, TiB2, ZrO2, SiO2 and graphite are being used as reinforcements to increases the properties of 6061Al alloy.
Micro structural characterization of the composite material state the fairly uniform distribution and some quantity of grain refinement in the specimens and the hardness and tensile properties has increases with AA6061 reinforced Al2O3 at 12% [5].
Online since: January 2016
Authors: Azwan Iskandar Azmi, Chye Lih Tan, Gou Zhou Keh, W.M.M. Irina, M.N.M. Radzi, K.W. Leong
The first phase is usually fibres or grains and mixed with second phase that is known as matrix (examples are polymeric materials) [1].
To understand the effect of controlled parameters on the drilling output, a number of researchers have employed the Taguchi approach in their study [2, 5, 11, 12, 13].
Smaller the better characteristic: SN=-10log1n(y2) (1) where: S/N is the signal to noise ratio; n is the number of observations; and y is the quality characteristic; Response Parameter.
Online since: July 2023
Authors: Cahyaning Fajar Kresna Murti, Triwikantoro Triwikantoro, Munaji Munaji, Andyan Rafi Setopratama, Phahul Zhemas Zul Nehan, Anis Silfiyatus Sa'adah, Fatimatul Munawaroh
The addition of zirconia grains in the alumina matrix increases the flexural strength and fracture toughness of the material [8,9].
The range of wave numbers 1764–1385 cm-1 shows Zr–OH bending vibrations, namely at the peaks of the spectrum 1641 and 1539 cm-1 [14,15].
Acknowledgment These works were supported by Doctoral Dissertation Research (PDD) Ministry of Education and Culture 2022 with contract number: 1425/PKS/ITS/2022.
Online since: November 2015
Authors: Marcel Sabin Popa, Ovidiu Virgil Vereș, Elena Adina Cotargă, Claudiu Ioan Jugrestan, Dan Preja, Stefan Sattel
These are composite materials, which consist of hard carbide particles (70-97% of total composition and 0.4-10 µm grain size) bonded together by a metallic binder through the process of sintering or Hot Isostatic Pressing (HIP).
The numbers increase with the loss of hardness, wear resistance and cutting speed and with the gain of toughness, bending strength and feed speed.
The number of teeth of a milling cutter will determine the feed rate.
Online since: March 2010
Authors: Li Zhang, Guo Da Chen, Shi Ming Ji, Ming Sheng Jin
The factors include the rotation speed of the polishing tool rw (rpm), the downward depth h (mm), the input current I (A) and the polishing time T (s) whose grain mesh number are placed in the columns (x1, x2, x3, and x4,respectively) of the L9 (34).
Table 1 Experimental condition workpiece steel 45, Φ20×8 [mm] abrasive particles synthetic diamond abrasive paste, type is W7 MRF density is 2.95 [g/cm3], off-state viscosity is 2.0 [Pa·s] electromagnetic coil height is 200 [mm], inradius is 75 [mm], exradius is 125 [mm] polishing angular 15 [°] rubber gasbag diameter is 40 [mm] Table 2 Experimental design and results number x1 x2 x3 x4 removal depth [mm] 1 250 1 1.5 30 0.0036 2 250 1.5 2 90 0.0042 3 250
Online since: October 2011
Authors: Viorica Simon, Ipek Akin, G. Göller, Simona Cavalu, I. Oswald, R. Gabor, O. Ponta, Cristian Ratiu
This development is also a response to the growing number of patients afflicted with traumatic or non-traumatic conditions: as the average age of population grows, the need for medical devices to replace damaged or worn tissues increases.
Particularly, an important biomedical research sector concerns orthopedic field, also because the number of implants is continuously growing, due to the increase in persons suffering of arthritis and joint problems.
By this sensitive technique, grain size and densification degree can be controlled as a result of TiO2 addition to Al2O3/ ZrO2.
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