Search:

  • grain number

Search Options

Sort by:

Publication Type:

Open access:

Publication Date:

Periodicals:

Search results

Online since: March 2008
Authors: Thomas Bell
It has also been noted that the S-Phase layer thickness in the duplex stainless steel was thinner in the grains which were formerly ferrite than in the grains of austenite due to the different solubility and diffusability of nitrogen [4] in both phases.
Williamson et al. was demonstrated that the S-Phase was created in a number of commercial nickel alloys such as Hastelloy X, Nickel 625, Inconel 600, Nichrome and Permalloy by N-ion beam processing.
Online since: August 2016
Authors: Matt Dunstan, James Paramore, Mark Koopman, Zhigang Zak Fang
This ability is unique to the HSPT process, and is not capable from vacuum sintering due to the coarse lamellar grains.
Acknowledgements The authors gratefully acknowledge the funding provided by the US Department of Energy through the Advanced Manufacturing Office of Energy Efficiency and Renewable Energy, award number DE-EE0005761.
Wang, “Hydrogen Sintering of Titanium to Produce High Density Fine Grain Titanium Alloys,” Adv.
Online since: September 2005
Authors: Chun An Tang, Tian Hong Yang, Leslie George Tham, Wan Cheng Zhu, Lian Chong Li, S.Y. Wang
However, in a large number of hydraulic fracturing problems there is a strong interaction between deformation (stress) and fluid flow.
It is well known that rock is a heterogeneous geological material containing many natural weaknesses, such as pores, grain boundaries, and pre-existing cracks.
As the stress ratio decreases, the main fractures, while oriented in the maximum horizontal stress direction, are no longer straight and show a tendency to branch out along the grain boundaries.
Online since: May 2003
Authors: Ian C. Clarke
The UK and USA experiences resulted in a number of clinical and retrieval studies (Table 1) that may or may not be relevant to today's modular cup designs incorporating alumina liners (D' Antonio et al., 2002).
There was grain erosion over about 25% of such worn ball surfaces and these corresponded to areas damaged by the cup-rim.
Table 2: Materials, design and surgical issues implicated in COC THR failures # Parameter Concerns 1 Inferior alumina grades low density, large grains 2 Inferior design concepts range of motion, dome holes 3 Cup placement too vertical rim wear of cup on ball 4 Poor anatomical positioning of cup neck-socket impingement 5 Cup loosening, rotation & migration rim wear; neck-socket wear 6 Poor bone inferior fixation 7 High patient activity frequent extensive ROM, high stresses The studies of "severe" wear in Mittelmeier THR seldom offered insight into clearly identifiable "suspect" ceramic parameters or patient-related risks in individual cases (Table 1).
Online since: May 2016
Authors: Lek Sikong, Wirach Taweepreda, Kalyanee Kooptarnond, Pipat Chooto, Matthana Khangkhamano, Phuriwat Jittiarporn
In recent years, a number of materials such as tungsten oxides [3], molybdenum trioxide [4, 5], titanium dioxide [6], metal (Ag) [7] and metal halide (AgCl) [8] have been extremely interested to produce photochromic materials.
The largest crystallite size of h-MoO3 was observed at pH 1.0 due to the fact that low pH value of the solution promotes the transformation of intermediate (NH4)2Mo4O13 phase to h–MoO3 structure and its grain growth.
The formation of rod–like h–MoO3 is as a result of the excess H+ ions from concentrate HNO3 in the reaction resulting in a phenomenon of one direction grain growth to generate the according well–faceted rod MoO3 [20].
Online since: August 2016
Authors: Mihai Branzei, Tudor Adrian Coman, Mihai Ovidiu Cojocaru, Ovidiu Vascan
Accordingly control parameters currently are grouped into four categories about the: a) Particles: size, shape, porosity, density and chemical composition; b) Thermite powder: size, roundness, specific surface area, bulk density; c) Thermite: specific surface area, apparent density, pore volume in and of the particles, average pore size, pore shape, pore size distribution, reaction rate, reaction temperature, explosive limit, amount of heat, amount of metal and amount of corundum; d) Thermitic metal: casting temperature, chemical composition, porosity, expansion coefficient, inclusion rate, metallographic structure, grain size, residual oxygen and hydrogen, mechanical properties (Rm, KCV and HV).
For this goal proposes currently using AW controls parameters that highlight the iron oxide percent as function of the grains size.
QUARK 1 Diagram can limit the number of attempts needed to determine the quantities of the TK [metallic oxides, atomized Al powder, graphite powder, ferroalloys (HCFeMn78, HCFeCr70, FeTi70, and FeNi45), reaction inhibitor (OL37) and flux (fluorite)], within 3.
Online since: November 2021
Authors: Anil Patil, Umesh J. Tupe, Arun V. Patil
The rGO with a high number of oxygen functional groups produced in a short reduction time shows a faster response to analytes.
Fig. 4: EDAX of rGO thick film Table 1: Elemental distribution in the rGO thick film Element Wt. % Atomic % C 89.02 91.82 O 9.94 7.70 Al 1.04 0.48 Au 0.0 0.0 Table 2: Summary of structural parameters of rGO thick film Crystallite (grain) size, D (XRD) Average particle size, d (FESEM) Atomic % (EDAX) C O 28.42nm 232 nm 89.02 9.94 Table 2 shows summary of structural parameters of rGO thick film.
Thus, at the junctions between rGO grains, the depletion layer and potential barrier leads to the increasing of the electrical resistivity value [34, 35, 36].
Online since: August 2016
Authors: Aamir Mukhtar, Graeme Smith, Ben Jackson, Warwick Downing, Peter Franz
It has been widely studied for a number of metal powders, including; Fe [5], Ti [6,7], Ti64 [8-10], Inconel 718 [11], 316L [12], 304 stainless steel [13], FeAl [14] and Cu composites [15].
Precipitation hardening [31], also called age hardening or dispersion hardening, is a heat treatment with temperature to produce fine particles of an impurity phase (out of the matrix and/or of existing metal impurities) that impede the movement of dislocations or defects in the crystalline grain structure of a material.
These plates are very fine due to the transformed martensite from which they evolved and limited time for grain growth to occur [37].
Online since: February 2016
Authors: Y.V. Titova, I.Y. Timoshkin, Antonina A. Kuzina, Aleksandr P. Amosov
. % AlN with high thermal stability (450-500oC) and high-temperature strength superior to typical sintered aluminum alloys and composites Al-AlN with large grains [22, 23].
However, the implementation of aluminum matrix composites reinforced with AlN particles in production has been hampered by a number of unsolved technological and economic problems.
Qian, SAP-like ultrafine-grained Al composites dispersion strengthened with nanometric AlN, Mater.
Online since: May 2013
Authors: Shu Lin Li, Zhao Hui Li, Ya Fei Wang, Xiao Ruan, Cun De Pan, Qiang Wang
”, a number of possible explanations have been offered by ecologists, such as “Ideal weeds characteristics” (Baker, 1965)[9], “Biodiversity resistance hypothesis(Elton, 1958)[10]”, “Enemies release hypothesis” (Darwin, 1859))[11], “Evolution of increased competitive ability hypothesis” (Crawley et al., 1987)[12], “Niche opportunity hypothesis”(Shea and Chesson, 2002)[13] , “Novel weapon hypothesis”(Mallick, 2000) [14] and so on .
Triticum aestivum were purchased from Ningbo seed companies. the selected seeds of Setaria viridis grain weight 2 ±0.15g were used for the experiment.
Daily recording of the number of germinated seeds in each Petri dish was done and continued for 12 days.
Triticum aestivum and Setaria viridis seed germination were the following method to calculate the parameters: Germination rate = (Number of germinated seeds/100) ×100%; Germination vigour = (Number of germinated seeds in the first 7 days/100) ×100% Germination Index = ∑(Gt/Dt) Where, Gt: Number of germinated seeds after t: Days of cultivation and Dt: N umber of cultivation days.
Solidago canadensis seed germination were the following method to calculate the parameters: Germination rate = (Number of germinated seeds/weight) ×100%; Germination vigour = (Number of germinated seeds in the first 7 days/weight) ×100% Germination Index = ∑(Gt/Dt) Where, Gt: Number of germinated seeds after t: Days of cultivation and Dt: N umber of cultivation days.
Showing 26661 to 26670 of 28482 items