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Online since: January 2010
Authors: T.James Marrow, S. Rahimi, D.L. Engelberg
Differences in the development of the distributions of cluster length scales were observed between the thermo-mechanical treatments.
GBE processing generally concentrates on increasing the fraction of Σ3 and Σ3related (Σ9, Σ27) variant grain boundaries (where grain boundary character is described using the coincidence site lattice, CSL, notation), with the aim of improving material properties such as the resistance to creep, intergranular corrosion and intergranular stress corrosion cracking.
Grain boundaries of different crystallographic structures are not randomly distributed, and clustering affects the connectivity of grain boundaries that are potentially resistant to stress corrosion cracking, for example.
Information about grain boundary connectivity and associated network morphology is therefore an important factor for describing material resistance [2,8,10,11].
However, the current data are sufficient to show that the cluster properties of the networks of particular grain boundaries can be quantified, and that measurable differences exist between microstructures.
Online since: November 2011
Authors: Yi Fei Liu, Xiao Dan Fang
However, to various cross-link polymer systems, shear affects the gelling time and gelling strength of the systems.
Mechanical shear will make polymer molecular chains broken and viscosity down.
Choosing appropriate polymer is based on the consistency and stability under the reservoir conditions, the possibility of reaction and cross-linking each other and the feasibility of economic factors.
Research the matching relation between the diverting agent materials and reservoir under the real reservoir conditions, diverting mechanism, and the behavior characteristic and micro mechanical properties change of the diverting agents in the process of deep migration, and so on.
Reference [1] P.R China, Oil and Gas Industry Standards SY/T5590-2004 "Evaluation Measures for Profile Control Agents Properties".
Online since: May 2021
Authors: Roto Roto, Kuwat Triyana, Yusbarina Yusbarina
Stainless steel (SS) electrodes are cost effective, have a large surface area, and have an excellent mechanical property [13].
It has excellent electrical conductivity, large surface area, outstanding catalytic properties, and corrosion resistance [17].
Due to its electrocatalytic properties in the electrochemical reaction, we apply it in the electrochemical oxidation of organic pollutants.
Factors affecting the degradation process, including the current and electrolysis time, were investigated.
Electrodeposition time affects the electrocatalytic ability of SS/G-OH electrodes.
Online since: June 2014
Authors: José Carlos Bressiani, Tamiye Simone Goia, Ana Helena de Almeida Bressiani, Kalan Bastos Violin, Carola Gomez Ágreda
The main fields of application, as orthopedics and dentistry, expect from materials some desirable properties of those particular metals like mechanical strength, corrosion resistance and non-toxicity among others.
The topography of the implant is one of the factors that influence the process of bone repair to osseointegrate the implant.
Titanium and its alloys are the main metal studied as porous implants by excellent mechanical properties and biological interactions.
Nakamura, Mechanical properties and osteoconductivity of porous bioactive titanium, Biomat. 26 (2005) 6014-6023
Li, D.C Dunand, Mechanical properties of directionally freeze-cast titanium foams.
Online since: November 2018
Authors: Mehmet Alper Sofuoğlu, Selim Gürgen, Fatih Hayati Çakır
They are heat-resistant and have superior mechanical/chemical properties at high temperatures, high melting temperatures, enhanced corrosion resistance/thermal fatigue [1,2].
Mechanical and Thermal Properties of Hastelloy-X Mechanical and thermal properties play an essential role in material behavior during machining.
Many of material properties change with temperature.
Some of the mechanical/thermal properties of Hastelloy-X are given in Table 2.
Table 2 Mechanical and thermal properties of Hastelloy-X Density 8220 kg/m3 Emissivity coefficient 0.85 Melting range 1290-1368°C Poisson's ratio 0.32 Modulus of elasticity 205 GPa The coefficient of thermal expansion 13.9 10-6m/m°C Thermal conductivity 9.2 W/m°C Results and Discussion Modeling of machining processes has many aspects.
Online since: November 2015
Authors: Bartłomiej Ciarkowski, Krzysztof Kamiński
The external causes may include mechanical impact as well as short- and long-term stable or time-varying load, environment humidity and temperature.
The basic parameters affecting the intensity of rheological processes are: stress (the value and speed of applied force), temperature, type and condition of the material.
According to Garofalo [7] rheological processes occurring in concrete are influenced by factors such as: the content of aggregates, ambient humidity, properties of cement used.
Therefore it can be assumed that factors influencing the creep of concrete will have an impact upon its relaxation.
Neville, Properties of Concrete (in Polish), fourth edition, Polski Cement Sp. z o.o., Cracow, ISBN-83-913000-0-5
Online since: September 2014
Authors: Ahmet Pamuk, Korhan Adalier, Patricia Gallagher
They included the effects of several influencing factors such as slope angle, permeability, and density, as well as shaking frequency and amplitude (i.e., peak acceleration).
Physical and mechanical properties of Nevada sand can be found elsewhere [11].
A detailed discussion about the employed colloidal silica stabilizer including its material properties and field delivery methods can be found in elsewhere [2].
One of the most important factors affecting the performance of earth structures subjected to an earthquake is the movement of the structure and the ground supporting it during and after the event [12].
Online since: July 2012
Authors: Liang Rong Zhao, Rong Rong Zhang, Shuang Mei Gong, Xiao Bo Li, Chang Ying Yang
They have properly tuned optical and redox properties, as well as high efficiency and long term stability [1-4].
The influence of the ligand on the redox properties of a transition metal ion can be substantial.
Quantum mechanical methodologies can be of great help in the design and scrutiny of new efficient dyes for DSSCs applications.
Excitation properties The geometry of the complexes has been previously optimized at the DFT level with the B3LYP functional and the LANL2DZ basis set.
It is suggested that the –CF3 group in the ligand greatly influences the hole injection properties of the materials.
Online since: October 2012
Authors: Zhong Xiu Fei, Chao Wei, Shui Guang Tong, Xue Mei Lin
The box as the basis for installation of the mechanical parts, plays a main role in protecting the drive systems and hold lubricants, which accordingly ensures the accuracy of gear transmission pair [1] [2].
Other regions where the structure could be changed without affecting the normal function of the gearbox, are defined as design domain, as is shown in Fig.6.
SIMP[3] is a kind of structure topology optimization method describing material properties.
By introducing a penalty factor[4], supposedly a relative density of a variable between 0 and 1 materials, builds a explicit non-linear relationship between elastic modulus and relative density of elements.
Online since: July 2015
Authors: Kay André Weidenmann, Lisa Baumgärtner, Benedikt Haspel
The interlaminar shear strength is a characteristic value describing the mechanical behavior of composite materials such as laminates.
Introduction For composite materials the load transfer between the different constituents such as fibers or the reinforcing phase in general and on the surrounding matrix are crucial factors for the mechanical performance.
This affects the significance of the test results.
Additionally, there is no difference in the material properties for CRTM and KRTM samples, i.e. no influence of chosen thermoset processing route regarding the interlaminar shear strength can be found.
This is an encouraging result as the CRTM route may then allow for faster processing at comparable material properties.
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