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Online since: February 2016
Authors: G.P. Doroshko, V.N. Ilyukhin, V.A. Mikheev
Some number of metals have certain properties, which are almost reached its ceiling, and some cannot be made, in principle (e.g., elasticity and high viscosity, the proper heat resistance and heat resistance in an oxidizing atmosphere and under the influence of mechanical loading and temperature above one thousand degrees, etc.).
Accompanying structural phase of self-organization at the grain boundaries polycomposite carried out on a series of scanning device STA.
There are alleged studies «in situ» state of the material as a result of counter-action material alloy components during the changings of external environment in various processes (casting, welding, heat treatment, deformation, machining, spraying), conducting temperature tests the boundaries between grains and phases and the formation of low-energy polycomposite coherent film nanostructures.
During database processing, it is installed a CTA device in internal feedback on the nuclear self-response, controlling the temperature of the coherent alignment of the boundary atoms in the structural formation and cluster units in the grain and interphase boundaries.
Online since: July 2005
Authors: Jian Lu, Yan Huai Li, Ke Wei Xu
Since there have been a number of models that can precisely predict residual stress distribution in shot peened layer, the focus in this work is concentrated on estimating relaxation of residual stress due to applied load and changed yield strength.
The values of yield strength in subsurface region are larger than that in the internal, implying strengthening effect due probably to the decrease of grain size.
The mechanical impact of surface region on residual stress relaxation can be considered as the cooperation of Bauschinger effect and grain strengthening effect.
(3) The values of yield strength in shot peening affected surface layer are lower after tension than after compression, this is believed to be a comprehensive result of Bauschinger effect and grain strengthening effect.
Online since: May 2012
Authors: Muhammad Iqbal, J.I. Akhter, Y. Javed, M. Rafiq, A. Qayyum, Aqeel Ahmed Khurram
(a) (b) (c) (d) (e) (f) Fig. 1(a-f) XRD patterns of: as cast Zr55Cu30Al10Ni5 BMG and irradiated with Si+ (a1, a2) irradiation of a BMG [Zr0.65Cu0.18Ni0.09Al0.08]98Ti2 with Ar+ ions (b) same alloy modified by EBM (c) MVL (d) and EBM (e) and LBM of (f) Zr65Cu17Ni10Al8 Microstructure of as cast and modified samples: SEM examination of the as cast samples of Zr-based BMGs taken from the center of the ingots show featureless surfaces without defects such as precipitates, pores, grain boundaries or segregation.
Grain boundaries were observed around the heat affected zone (HAZ).
Grain boundaries are formed due to structural change from amorphous state to crystalline.
Balance Si =31 Si and Zr rich PPT Zr64Cu7.5Ni17Al11.5 A1 LBM 3.5 8.3 21.1 Balance - White PPT-1 Zr64Cu7.5Ni17Al11.5 A2 LBM 10.3 11.4 13.9 Balance - Black PPT-2 Zr64Cu7.5Ni17Al11.5 A3 LBM 3.7 15.8 29.5 Balance - Black star like PPTs Zr64Cu7.5Ni17Al11.5 A4 LBM 6.8 16.0 16.2 Balance - Segregation in cracked area Zr64Cu7.5Ni17Al11.5 A5 LBM 5.1 11.1 8.3 Balance - Needles like white PPT Zr65Cu17Ni10Al8 A1 EBM 8.1 11.7 20.1 Balance - CuZr2 phase Zr65Cu17Ni10Al8 A2 EBM 5.2 12.1 25.0 Balance - CuZr2 phase Zr65Cu17Ni10Al8 A3 EBM 5.0 11.7 19.5 Balance - CuZr2 PPT Zr65Cu17Ni10Al8 A4 EBM 5.2 16.2 31.1 Balance - Black PPT Cu10Zr7 [Zr0.65Cu0.18Ni0.09Al0.08]98Ti2 A1 EBM 8.0 9.7 17.3 Balance Ti=2.3 PPT [Zr0.65Cu0.18Ni0.09Al0.08]98Ti2 A2 EBM 10.1 10.5 17.1 Balance Ti=2.7 Segregation area [Zr0.65Cu0.18Ni0.09Al0.08]98Ti2 A3 EBM 5.0 19.7 33.8 Balance - Black PPT [Zr0.65Cu0.18Ni0.09Al0.08]98Ti2 A4 EBM 5.8 16.5 25.0 Balance - CuZr2 phase Mechanical properties of modified BMGs: Vicker’s hardness (HV) of a number
Online since: January 2012
Authors: Srinivasa Ranganathan, Satyam Suwas, P. Ramesh Narayanan, Parameshwar Prasad Sinha, K. Sreekumar
The input data for the calculation are generated through discretization of 2000 grains from the X- Ray diffraction texture data using commercially available software, LaboTex Software, version 3.0. 3.0 Results and Discussion 3.1 Bulk Texture: The constant ф2 = 0o, 45oand 65o sections of the ODFs for 70% cold rolled (a) AA 7075 and (b) AFNOR7020 alloy samples obtained from the mid thickness are given in Fig 2.
One reason for this could be that in the computation, only 2000 grains are taken into account while the measured values are calculated from the bulk of the specimen where the number of grains is quite large [11-13].
Online since: April 2014
Authors: Zheng Tao Jiang, Chen Li, Pian Niu, Yi Peng Zhang, Xiao Li Huang
Proxy re-encryption is an efficient solution to ciphertext delegation and distribution, which also enables the sender to carry out fine-grained control on his ciphertext.
(c) Multi-use of and single-use of PRE According to the number of receivers of PRE schemes, it can be classified into two groups: multi-use, i.e., the ciphertext can be transformed from Alice to more than one receiver; and single-use, i.e., the ciphertext can only be transformed one receiver.
Different type of PRE schemes (such as full trusted/semi trusted proxy, bidirectional/Unidirectional, multi-use/single-use, Transitive/non-transitive PRE) can be used to particular fine-grained control on ciphertexts.
Online since: July 2020
Authors: Zbigniew Brytan, Wojciech Pakieła
The essential processing parameters include scanning speed, line spacing, defocusing value, and a number of scanning as well as the surrounding atmosphere and sample surface properties like composition and roughness.
The typical surface topography of the 2B surface finish (Fig. 1a) shows visible rounded grains of smooth boundaries and the slip lines visible on the surface (Fig. 1b) formed during plastic deformation.
The cross-slip events and activation of multiple slip systems are also viewable as slip line crossing without deviation on the grain surface.
The typical pickled grains of rough and developed surface topography is visible (Fig. 2a), while the space between grain boundaries is smooth (Fig. 2b).
The steel grains of pickled morphology, with visible holes and cavities, are uniformly covered by dense and compact oxide layer (Fig. 12a) of typical nanogranular morphology and step edges of oxide nuclei arrangement (Fig. 12b).
Online since: June 2017
Authors: B.K. Rakhadilov, M.K. Skakov, T.R. Tulenbergenov
However, these samples have small cracks, while the temperature increases the size and number of cracks also increases.
These samples had small cracks, while the temperature increases to 1500°C and a size and number of cracks also increase.
Tungsten surface etching, the grain boundaries manifestation and their orientation occur as a result of interaction with the hydrogen plasma.
However, these samples had small cracks, while the temperature increases to 1500°C size and number of cracks also increases. 2.
Online since: December 2013
Authors: Xiao Hu Dang, Lu Li
A Study on Carbon Sink of Reforestation Under Different ‘Grain for Green’ Models in the Southern Ningxia Province of Loess Hilly Region Xiaohu Dang1, a, Lu Li 1,b 1 Xi’an University of Science and Technology Xi’an, China aXiaohud2004@163.com, b13772537213@163.com Keywords: Carbon Stock; Reforestation; Soil organic carbon; Loess hilly region Abstract.
Compared to that of the sloping cropland (59.55 t·hm-2), carbon densities of P. sibirica and L. gmelini ecosystems increased by 42.90% and 78.20%, respectively; for the Hippophae rhamnoides and P. davidiana ecosystems, the number increased by 6.28% and 30.61%; carbon content in soil layer between 0-100cm reduced significantly with the depth, the distribution pattern of carbon sequestration was in the order of soil layer > vegetation layer.
Online since: July 2020
Authors: Hrishikesh Das, Joshua Justice, Helen Pham, Swapna Sunkari, George Park, Young Ho Seo
Invariably, the number of these killer defects sets the yield entitlement for each wafer, and electrically, they fall into a few expected failure bins depending on their position on the die.
Non-killer crystal defects include stacking faults (l), basal plane dislocations (m), bar stacking faults (n), and grain boundaries (o).
The validity of the killer defect detection and classification is tested against a large number of 1200 V production diode and MOSFET lots.
With the enhanced detection capabilities of modern metrology tools, which include higher resolutions and high PL SNRs, the number of both non-killer topographic and pure crystal defects detected have increased manifold.
It should be noted that the total number of die with BSFs are significantly lower than the unaffected population.
Online since: October 2010
Authors: Paul Muralt
The epitaxial growth on single Pt grains is well visible (from [12]).
During further growth, a dens fibrous, columnar grain structure develops.
Atomic (001) planes meet at grain boundaries as if adatom diffusion crosses grain boundaries.
Such grains behave as single crystals with excellent elastic and piezoelectric properties, meaning that single grains have one polarity.
The small numbers aside of the points are the film thickness in micro meters (ref [27] and citations therein).
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