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Online since: August 2004
Authors: Jan D. Achenbach
These properties are very sensitive to a number of factors, which are determined by
the deposition technique and by processing parameters.
θLSAW 1.20 5600 Acoustic Lens Coupling Fluid Specimen x z Title of Publication (to be inserted by the publisher) Laser-Based Ultrasonics The generation of ultrasound by laser irradiation provides a number of advantages over conventional generation by piezoelectric transducers.
Grain, H.J.
θLSAW 1.20 5600 Acoustic Lens Coupling Fluid Specimen x z Title of Publication (to be inserted by the publisher) Laser-Based Ultrasonics The generation of ultrasound by laser irradiation provides a number of advantages over conventional generation by piezoelectric transducers.
Grain, H.J.
Online since: March 2007
Authors: Jilt Sietsma, L. Strezov, T. Zuidwijk, Rian Dippenaar, Dominic Phelan
The study of strip casting raises a number of issues to be dealt with.
The formation of nanometre-sized precipitates under rapid solidification conditions has been noted in a number of studies [5,6,7] for a range of alloys, and implicated in an increase in yield strength, work hardening and in recrystallisation modification.
The experimental design has close similarities to that used by van Boggelen et al. [15] to study grain coarsening of semi-solid Al-Cu alloys Figure 2 Schematic representation of the experimental arrangement for strip casting simulation in a Gleeble 3500/3800 Development work conducted thus far has concentrated on establishing control over the heating of the sample, cooling the copper rods and achieving rapid quenching.
The formation of nanometre-sized precipitates under rapid solidification conditions has been noted in a number of studies [5,6,7] for a range of alloys, and implicated in an increase in yield strength, work hardening and in recrystallisation modification.
The experimental design has close similarities to that used by van Boggelen et al. [15] to study grain coarsening of semi-solid Al-Cu alloys Figure 2 Schematic representation of the experimental arrangement for strip casting simulation in a Gleeble 3500/3800 Development work conducted thus far has concentrated on establishing control over the heating of the sample, cooling the copper rods and achieving rapid quenching.
Online since: September 2011
Authors: Zhong Qiu Li, Chun Long Liu
A number of studies in both vitro and vivo showed that YSE can decrease ruminal ammonia levels and increase propionate concentration[4], inhibit methane production[5], alter the rumen microflora in vivo.
Average daily gain was improved by finishing steers fed high-grain diets supplemented with YSE.
Numbers of protozoa were counted using a Fuchs-Rosenthal counting chamber.
Average daily gain was improved by finishing steers fed high-grain diets supplemented with YSE.
Numbers of protozoa were counted using a Fuchs-Rosenthal counting chamber.
Online since: December 2010
Authors: Akira Sugiyama, Itsuo Ohnaka, Kunihiko Konishi, Yoshinori Obana, Nobuo Sako, Jin Dong Zhu
If we use the FEM to handle a large number of mold elements, we can easily decrease the
number of elements with using larger elements in the sand mold.
It seems that the gasification might be delayed on EPS grain boundaries. 5.
It seems that the gasification might be delayed on EPS grain boundaries. 5.
Online since: June 2006
Authors: Xiao Zhi Hu, Kai Duan
To demonstrate self-consistency with a Weibull
distribution, the total number of flaws N(c) larger than c can be determined by integrating Eq. 3.
Deconvolution of fits to strength data in Fig. 1 to determine number of flaws per unit area of specimen tensile surface for silicon single crystal beam specimens.
We may also expect changes when comparing single crystal with polycrystalline silicon specimens because of the role of grain boundary defects in the latter, with the potential for change from surface to volume defects as well as change in toughness.
Deconvolution of fits to strength data in Fig. 1 to determine number of flaws per unit area of specimen tensile surface for silicon single crystal beam specimens.
We may also expect changes when comparing single crystal with polycrystalline silicon specimens because of the role of grain boundary defects in the latter, with the potential for change from surface to volume defects as well as change in toughness.
Online since: July 2016
Authors: M.A. Llano-Serna, M.M. Farias, D.M. Pedroso, D. Sheng, David J. Williams
The total number of material points representing the model and the background mesh vertices is about 25,000 and 11,000, respectively.
Fig. 2 Discretisation strategy adopted for the simulation: (a) Surface-based cone discretisation; (b) Cone shell adopted to minimise the number of material points.
[19] ASTM D 4648M-10, Standard test method for laboratory miniature vane shear test for saturated fine-grained soil, ASTM International (2010)
Fig. 2 Discretisation strategy adopted for the simulation: (a) Surface-based cone discretisation; (b) Cone shell adopted to minimise the number of material points.
[19] ASTM D 4648M-10, Standard test method for laboratory miniature vane shear test for saturated fine-grained soil, ASTM International (2010)
Online since: April 2018
Authors: Michal Ackermann, Jiří Šafka, Jan Koprnicky
In recent years, a number communities or startups of open source projects
has been founded to deal with the use of 3D prints in prosthetics, especially prosthetics of upper
limbs.
It is a very precise technology that excels with a large number of usable materials.
The resulting object of this technology has to be additionally surface-treated to avoid release of not sintered powder grains.
It is a very precise technology that excels with a large number of usable materials.
The resulting object of this technology has to be additionally surface-treated to avoid release of not sintered powder grains.
Online since: December 2009
Authors: E. Mahmudi, Hassan Farhangi
Since the material
undergoes severe plastic deformation at high temperatures, the FSW process generates a fine grain
structure in the centre of welds, which has been ascribed to dynamic recrystallisation.
Furthermore, in a number of studies [12-14] the tensile properties and fracture location of various aluminium alloys have been studied.
The resulting zigzag hardness profile presented in Fig. 9 clearly shows that the hardness number is higher in the particle rich bands under all welding conditions, which is (µm) 1120 rpm 900 rpm consistent with the hardening effects of secondary particles.
Furthermore, in a number of studies [12-14] the tensile properties and fracture location of various aluminium alloys have been studied.
The resulting zigzag hardness profile presented in Fig. 9 clearly shows that the hardness number is higher in the particle rich bands under all welding conditions, which is (µm) 1120 rpm 900 rpm consistent with the hardening effects of secondary particles.
Online since: June 2007
Authors: Jong Taek Yeom, Nho Kwang Park, Dong Geun Lee, Jeoung Han Kim, Chong Soo Lee
The
average grain size of the heat-treated Waspaloy disc was
ASTM 7~8(25mm~35mm), as shown in Fig. 1.
Continuum damage model are coupled based on the assumption that fatigue damage and creep damage accumulate additively: f R N dN t dt dD += (14) Where tR is the time to rupture in creep at constant stress and temperature, and Nf is the number of cycles to failure in fatigue under a periodic loading conditions.
When the load is periodic, the number of cycles to failure (NR) under combined fatigue-creep can be described by: ∫∆ +=+= t F C f R R NNNt dt N 0 111 1 (15) Where t∆ is the total period of the cyclic test.
Continuum damage model are coupled based on the assumption that fatigue damage and creep damage accumulate additively: f R N dN t dt dD += (14) Where tR is the time to rupture in creep at constant stress and temperature, and Nf is the number of cycles to failure in fatigue under a periodic loading conditions.
When the load is periodic, the number of cycles to failure (NR) under combined fatigue-creep can be described by: ∫∆ +=+= t F C f R R NNNt dt N 0 111 1 (15) Where t∆ is the total period of the cyclic test.
Online since: March 2011
Authors: Jun Wang, Cheng Yong Wang, Wu Sheng Luo, Y.X. Song
Erosion at or close to normal incidence involves the formation of crater lips of highly deformed material, which are subsequently removed as platelets after impact by a number of successive particles [8].
Also, most of the available models require a number of process dependant calibration constants thus limiting the range of the model.
Momber[23] metals Cutting wear The model only apply to a narrow range diameter abrasive grain and a constant density for a given abrasive material.
Also, most of the available models require a number of process dependant calibration constants thus limiting the range of the model.
Momber[23] metals Cutting wear The model only apply to a narrow range diameter abrasive grain and a constant density for a given abrasive material.