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Online since: October 2007
Authors: Tatsuo Sato, Tomo Ogura, Shoichi Hirosawa
The elongation was quantitatively related to the three microstructural factors; i.e. the width of PFZ, size of grain boundary precipitates and the level of proof stress, to predict ductility of the alloys with known microstructural factors.
To control microstructures in the vicinity of grain boundaries is important because they are believed to affect greatly the mechanical properties of the alloy [1].
We reported that microalloying of Ag is quite effective to modify the microstructures and improve the mechanical properties of the alloy [2, 3].
Thus, it was clearly found that the similar improvement of mechanical properties could be achieved by two-step aging as is the case of Ag addition.
Quantitative correlation between tensile properties and microstructural factors.
Online since: February 2013
Authors: Chun Xing Hai, Yi Fang, Xiao Jia Li, Cong Cong Chen, Min Zhang, Rui Ping Zhou, Tian Ming Gao, Rui Qiang Zhang
Soil is the basis of grassland ecosystem, and the changes of its properties directly affect grassland ecosystem.
Soil physical and chemical properties were analyzed in each test area.
Grazing first change soil compactness, and then cause other physical and chemical properties change[5].
Analysis method The study is mainly according to the physical properties and chemical properties.
For soil physical properties, this paper mainly compared the changes of soil moisture content and mechanical composition in experimental zone.
Online since: March 2014
Authors: Shu Zhong Wang, Pan Pan Sun, Yan Hui Li, Xue Dong Li
At present, the superheater and reheater pipes in supercritical and ultra-supercritical boilers have encountered with widespread problems of high temperature steam oxidation, seriously affecting the operation safety and economy of the power generation unit.
Factors on the high temperature steam oxidation resistance of metal materials are mainly divided into three categories: the nature of oxide films, internal factors, and external factors, namely the external environment.
Internal factors are inherent properties of the material, and the nature of oxide films plays a role through mainly affecting the transfer and migration of metallic cations and anions.
To a certain degree, these methods improve the anti-oxidation properties of the material to steam, but there still exist some problems.
We put the Super304H specimens into the mechanical centrifugal shot peening equipment, and then adjusted the revolving speed and the pellet flow to an appropriate level.
Online since: June 2011
Authors: Xiao Dong Peng, Qun Yi Wei, Wei Dong Xie, Gang Chen, Zhong Hua Su, Yan Yang
Lithium content in Mg-Li alloy is a key factor affecting the microstructure and properties of this series alloys.
The mechanical properties of traditional Mg-Li alloys are lower than the usual Mg alloys.
What’s more, Sr addition can improve the mechanical properties of Mg alloys especially the high temperature properties [10].
At last the mechanical properties of as-cast Mg-9Li-3Al-xSr alloys were tested.
Mechanical properties.
Online since: August 2015
Authors: Radim Kopřiva, Jan Štefan, Ivana Eliášová, Jan Siegl
The NPP safety assessment therefore requires precise information on the degradation of the mechanical properties of the NPP components structural materials.
Mechanical properties of the NPP components structural materials are presently evaluated by “conventional” methods, comprising of surveillance programs.
Fracture properties are evaluated either from Charpy impact tests (notch toughness, ductile-to-brittle transition temperature), or from fracture toughness tests (JIc – critical J-integral, KIc – critical stress intensity factor, T0 – reference temperature, etc.).
Furthermore, for the determination of material properties, sampling of the necessary volume of material is connected with affecting the integrity or even with the destruction of the assessed component.
Subsequently, the majority of the tests results were permitted to be taken into account in the process of mechanical properties evaluation.
Online since: July 2015
Authors: Xing Pin Chen, Hong Fu Sun, Meng Liu, Xuan Zheng, Xiao Guang Li
Soft Ag can’t provide enough mechanical properties to tapes [2,3].
However, there are still few reports about that how Ni sheath affects the mechanical property and processability specifically.
Mono-filament Bi-2223/Ag tapes were also prepared as comparing samples for mechanical properties and texture tests.
Before measuring mechanical properties, samples were annealed at 840°C for 10 h in air to remove machining stress.
Volume fraction and microstructure are essential factors that influence the eventual transport properties [10,11,12,13,14,15,16].
Online since: November 2013
Authors: Paul Meehan, Zhao Bing Liu, Yan Le Li, W.J.T. Bill Daniel
The mechanical properties for AA7075-0 are shown in Table 1.
Mechanical properties for AA7075-0.
This allows for the efficient collection of the necessary data to determine which factors most affect product quality with a minimum amount of experimentation.
Determine the design parameters affecting the process.
Factors/Run no.
Online since: July 2016
Authors: Chuan Zhen Huang, Jun Wang, Hong Tao Zhu, Peng Yao, Xiang Ning Pan
Laser-assisted waterjet micro-grooving of silicon wafers for minimizing heat affected zone Xiangning Pana, Chuanzhen Huangb * Jun Wangc, Hongtao Zhud and Peng Yaoe Center for Advanced Jet Engineering Technologies (CaJET), Key Laboratory of High-efficiency and Clean Mechanical Manufacture (MOE), School of Mechanical Engineering, Shandong University, Jinan, China.
This paper aims to develop predictive models for groove depth, width and heat affected zone using a dimensionl analysis technique.
Furthermore, the waterjet offset distance affects negligible.
(6) Substitute the experimental data and the properties of monocrystalline silicon in the Eq.6, , the equation of H~(P, v, d, xwl, Pwj) can be worked out through the regressive analysis.
It has been investigated based on Dimensionl Analysis that the waterjet pressure is the most notable factor for groove geometry and HAZ size.
Online since: January 2011
Authors: Xin Sheng Zhu, Qiang Gao, Xiao Li Shi, Qian Qian Pan, Xiao Shan Jiang, Ran Tao
However, the apparent mechanical properties of the nonwovens are generally rather weak.
Table 1 lists the mechanical properties of electrospun fibrous mats of the polymer blends.
Fig. 6 shows the mechanical properties of the polystyrene fibrous mats treated at different temperatures.
The mechanical properties were dominated by the two factors, the disorientations of fibers and the increase of interfiber adhesion, and the soaring up of the strength could be due to the superfluous solderings among the fibers.
Fig. 7 Air filtration efficiency of PET nonwoven and tier composite nonwoven Summary (1) The volatility and polarity of solvent strongly affect electrospinning behaviour, and thus the fiber morphology and mechanical properties
Online since: July 2014
Authors: P. Sevvel, V. Jaiganesh
In the Present paper, the effects of axial force, rotational speed of the FSW tool, welding speed and shoulder penetration on various mechanical properties of Aluminium alloy 6063 butt joint produced by Friction Stir Welding have been analyzed.
The mechanical properties like tensile strength, Yield strength and % Elongation have been tested using 6 mm thickness plate.
The welding quality can be improved by enhancing the mechanical properties and minimizing the defects.
Hence, analysing & examining the mechanical or physical properties and other relevant significant factors would help to enhance the weld reliability.
Results and analysis 3.1 Analysis of Signal to Noise Ratio (S/N) as a Response The control factors which are found contributing reduced variation are quickly identified and presented as response.
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