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Online since: October 2010
Authors: Chang Jun Qiu, De Wen Tang, Ju Zhou
However, when the laser cladding layer is rapidly heated and cooled, the process of solidification cracking seriously affect the quality of the surface[1].
Suh and Chang [5-6] studied small plastic deformation on the surface of micro-forged metal, to enhance its mechanical properties.
Ni60A's mechanical properties are shown in Table 1.
Table 1 Ni60A mechanical properties Hardness (HRC) melting temperature (°C) Young's modulus (MPa) Poisson ratio Coefficient of the thermal expansion(/°C) 55~60 1024 204×103 0.28 13.36×10-6 The plastic material behavior with elastic-plastic of stress and strain relationship is is expressed as: { } [ ]{ } { }dTCdDd −= εσ (1) Where [ ]D is elastic or elastic-plastic matrix, { }C is vector related to temperature.
The Critical Influence Factors on Crack Formation During High Power CO2 Laser Cladding of NiCrSiB Alloy by Powder Feeding.
Online since: July 2022
Authors: Benjamin Klusemann, Ruslan Sikhamov, Volker Ventzke, Falk Dorn, Nikolai Kashaev, Noomane Ben Khalifa
Titanium alloys are widely used in aerospace and automotive industries due to their excellent mechanical properties, however, the formability is limited, which is an issue during forming.
The formability is usually affected by many factors such as temperature, strain rate, etc.
However, it has promising properties in terms of mechanical and fatigue strength as well as fracture resistance [5].
In [5] it was shown that the alloy has well-balanced properties in terms of mechanical strength, fatigue strength and fracture resistance, therefore the alloy is valuable for industry and can replace conventional titanium alloys such as Ti Grade 2 and Ti Grade 4.
Table 3 – Tensile properties of Ti KS1.2ASN at different strain rates, obtained at RT.
Online since: October 2016
Authors: Yong Shin Lee
Introduction Wire drawing has been used in a wide range of applications, and its ultimate goal is to manufacture a product, which has good mechanical properties without any defects.
Such internal damage may cause the deterioration of mechanical properties of a product, and reduce its service life by the eventual fracture.
In this study, ductile damage is defined by a porosity since the deterioration of mechanical property could be affected mainly by a porosity as suggested by Rice and Tracey [8].
The most important parameter affecting on damage evolution is mean stress.
Bae, Parameters Affecting on Wire Drawability of Pearlitic Steel, Trans.
Online since: September 2006
Authors: R. Bucher, Alexander M. Korsunsky, M. Topic, Willem J.J. Vorster, Shu Yan Zhang, P.J. McGrath
Three mechanisms such as the temperature gradient, the buckling mechanism, and the upsetting mechanism have been identified to explain the thermo-mechanical behaviour in laser forming, depending on part geometry, laser process conditions and the complex interaction of many thermal and mechanical factors [4-6].
With the continued heating the bending moment of the plate opposes the counter bending and the mechanical properties of the material are reduced (deteriorate or are impaired).
In laser forming process, steep temperature gradients and thermal cycles lead to severe microstructural changes in the heat affected regions within very short time.
They also create the conditions for the dynamic recrystallization which in combination with phase transformation are the key factors leading for grains refinement.
It is well known that the grain size, morphology, distribution, shape and volume fraction of the martensite phase together with achieved residual stress critically control the mechanical properties, especially fracture, fatigue behaviour and corrosion resistance of steels [14].
Online since: April 2014
Authors: Hai Xiang Liu, Qing Xu Zhang, Ye Qiang Tan, Xue Qin, Ran Ran Zheng, Kun Yan Sui, Yan Zhi Xia
As well known, carbonaceous materials such as carbon black (CB), multi-walled carbon nanotubes (MWNTS), and graphene oxide (GO) have attracted great interest of researchers over the past decades due to their unique structural and the resultant electrical, optical and mechanical properties[5].
In light of the properties of carbonaceous materials, the low mechanical of SA may be improved by introduction of carbonaceous materials.
In this paper, the rheological properties of SA and three different SA/carbonaceous materials suspensions were studied through applying rotary rheometer MCR301.
The rheological properties of the solutions were measured using an Anton-Paar MCR 301 rheometer with a cone-and-plate fixture.
This indicated that SA solution has been less affected by CB and MWNTs in this concentration.
Online since: February 2020
Authors: Praveen Kumar, Tanmoy Das, Jinu Paul
The mechanical properties depend upon the number of graphene layers and its internal defects.
The lower thickness of the intermetallic compound has been reported to lead to higher mechanical properties.
The mechanical properties were improved by the incorporation of the nickel interlayer.
The degree to which the sample can be heated softened and melted locally is manageable by two factors, the welding current (I) and the time (t) for which the current is used.
Zhou, “Mechanical properties of dissimilar resistance spot welds of aluminum to magnesium with Sn-coated steel interlayer,” Mater.
Online since: May 2014
Authors: Fang Jung Shiou, Assefa Asmare Tsegaw
It has good physical and chemical properties.
Design of experiments (DOE) is one of the vital steps in determining the effects of polishing parameters simultaneously and the interaction of all factors that could affect the target.
Control factors Measured Ra, [µm] S/N Mean No.
According to Fahnle’s investigation [24], among numbers of factors that would affect the material removal rate pressure of the system takes the lion share.
[19] SCHOTTGLAS, Optical glass in: description of properties, Germany, 2000, pp. 6
Online since: November 2012
Authors: Di Liu, Yi Yang, Guo Hua Wang, Shi Wen Wang
Deformation has occurred to partial sections of the machine roadways, which affects their safe production badly.
Action mechanism of blasting on slope The action of blasting on the slope is performed in two aspects: firstly, the formed vibration inertial force adds slippery factors to the slope.
Secondly, the constant action of blasting vibration leads to the increase of the shearing strength of the surrounding rocks, the expansion and extension of the original structure face, tectonic structure face and original cracks and fractures, or even the formation of new blasting cracks and micro-cracks, and the decrease of the slope’s original physical and mechanical properties, thus affecting the overall stability of the slope[1,2].
The destruction of slope ground mass caused by blasting is not only decided by mechanical properties of rock mass, but also is related to loading nature and loading speed obviously.
Online since: October 2010
Authors: Xiang Ren
Analyzing mechanical properties of bridges have particularly significance for the operation and the construction process of long-span bridges[1-6].
In construction process of truss bridge, line shape observation of the lower chord members (the main girder) was one of the most important contents, as well as the key factor of construction quality control.
The curve Changes not only directly affected the line shape of bridge deck, but also decided whether the installation of the truss can be accurately located.
The elastic modulus of concrete was one of the primary factors affecting the structure’s line shape.
Online since: January 2012
Authors: Cui Feng Du, Jian Hua Du, Hong Shuang Li
Current ore drawing studies abstract ore granular as continuum media , suppose the velocity of the granular particles and the like as the continuous function of their locations, study the movement rules of ore granular from a macro sense of statistic, not from the ore drawing nature of the problem, that is, force is critical to affect the movement to conduct systematic research , not from a mechanical point of view to study the movement law of ore [5,6,7].
PFC model 4.2 PFC Numerical Simulation Process (1)Generated loess layer, covering layer and ore particles, and gave corresponding properties; (2) Cycled to a state of equilibrium; (3)Ore drawings were carried out on the middle three inlets to the cut-off grade from left to right, both sides of the ore as boundary conditions. 4.3 Result Analysis The media drawing when each of the inlets reached the cut-off grade under the covering layer thicknesses of 15 meters, 20 meters, 25 meters and 30 meters respectively were shown in fig.3.
Meanwhile, the covering layer thickness directly affected the maximum loess deposition.
According to the investigation, thinnest cover in Jinshandian Iron is only 12 meters, then as mining proceeds, will inevitably produce a large settlement of loess, thus influx in stopes may affect production.
Qiao Guogang;Li Zhanjin ;Yang Dandan;Analysis of Factors Influencing Determination of Cover Layer Thickness in Transition from Open Pit to Underground Mining,Metal Mine,34-36(2008) [3].
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