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Online since: April 2010
Authors: Sonia Simões, Ana Sofia Ramos, Manuel F. Vieira, Filomena Viana, Maria-Teresa Freire Vieira
The heat treatments are also responsible for the grain growth, although at least up to 425ºC the size remains nanometric [9].
Several sets of experiments were designed in order to have a sufficient number of indentations in each region.
Several sets of experiments were designed in order to have a sufficient number of indentation tests in each region.
The values presented correspond to an average hardness, although the number of indentations in these layers does not justify the inclusion of standard deviation values.
The grain growth promoted at 800ºC compared with the lower heat treatment temperatures is responsible for this difference, as predicted by the Hall-Petch relationship.
Online since: March 2007
Authors: Koh Ichi Sugimoto, Shunichi Hashimoto, Shushi Ikeda, Mitsuhiro Itoh, Tomohiko Hojo, Goro Arai
When ausformed at 600 and 700 o C, the size of recrystallized polygonal ferrite grain decreases to about 0.5-1.0 µm (c, f), and retained austenite morphology changes from filmy to blocky.
From image quality t (s) TA=400 o C, tA=500s TR=600-900 o C, R=0% or 50% 40o C/s T ( oC) Tγ=900 o C, 1200s Journal Title and Volume Number (to be inserted by the publisher) 3 (IQ) analysis of bcc phase by EBSP, IQ index decreased when ausformed at lower temperature.
Nominal stress - strain curves of steels A and B strained to R=0% or 50% at 900 o C. 0 10 20 30 40 50 60 600 700 800 900 TEl (%) TR (oC) (a) A, R=0% A, R=50% B, R=50% B, R=0% 0 50 100 150 200 600 700 800 900 CIAV (J/cm2) TR (o C) A, R=0%A, R=50% B, R=0% B, R=50% (b) 0 200 400 600 800 1000 1200 1400 0 10 20 30 40 50 60 σ (MPa) ε (%) B, R=0% B, R=50% A, R=50% A, R=0% 400 500 600 700 800 900 600 700 800 900 YS (MPa) TR (oC) A, R=50% B, R=50% B, R=0% A, R=0% (a) 800 900 1000 1100 1200 1300 600 700 800 900 TS (MPa) TR (oC) A, R=50% B, R=50% A, R=0% B, R=0% (b) 0.5 0.6 0.7 0.8 0.9 600 700 800 900 YS/TS TR ( oC) Si, R=50% Al, R=50% Si, R=0% Al, R=0% (c)Journal Title and Volume Number (to be inserted by the publisher) 5 Figure 6.
Note that coarse NbC precipitates in the steel B may contribute to refined microstructure through suppressing grain growth of prior austenite 18) .
Journal Title and Volume Number (to be inserted by the publisher) 7 [17] M.
Online since: August 2021
Authors: Yuri V. Dolgachev, Viktor N. Pustovoit
In austenite, there are regions with ferromagnetic order (ferromagnetically ordered nanoclusters), the number and size of which increase with decreasing temperature or upon application of an external magnetic field [13].
For a spherical embryo: (2) The formation work of a critical size nucleus is determined by substituting the value Rcr into Eq. 1: (3) The free formation energy of one ferromagnetic cluster (without considering the interface energy between the paramagnetic matrix and a atoms group with parallel spins) can be written as Df* = DF·V·I2·N0/VM, where VM is the molar volume, and N0 is the Avogadro number.
This is a consequence of the sufficient uncertainty and the dependence on a large number of the parameters Df, s, U, which are available in the literature and refer to such processes as decomposition of austenite in the pearlite temperature range and intermediate transformations, decomposition of retained austenite upon tempering.
During the nucleation of the initial phase at the grain boundaries, one should also take into account the contribution of the released excess the grain boundary energy, which reduces the formation work of the critical nucleus.
Online since: August 2014
Authors: Ya Wei He
The lake basin shrank and water became shallow and the edge of multi-Delta basin formed a single entity, shaping a braided lake forwarding delta sediment system, of which the nearby distributaries channel shore were mostly thick-massive fine-grained sandstone [1].
Grained fine contains mica feldspar sandstone.
The authigenic quartz is the gap filling occurrence, illite has been distributed in intergranular, chlorite pore lining occurrence, siliceous and feldspathic to increase output or to grain filling in pore, zero base, particle, point - line contact, cementation type is mainly the pore type, etc. 1.3 Feature of the reservoir physical property 1.3.1 Porosity features According to the porosity analysis of 232 samples in the Dongrengou region, the maximum porosity of Chang 2 reservoir is 21.4% and the minimum is 4.7%, the average is 14.9%.
Table 3 Results of composite plugging organic and inorganic acid blockage plugging core number formula(%) permeability(μm2) damage(%) effect(%) CLO2 HCL HF K0 K1 K2 K3 K4 17-1 3.0 12 2 101.20 0.13 31.86 50.25 56.37 99.87 55.7 17-2 3.5 14 2 99.85 0.11 38.07 62.49 68.50 99.89 68.6 17-3 4.0 16 3 97.64 0.09 41.36 68.06 74.99 99.91 76.8 17-4 4.5 18 3 105.10 0.14 50.14 80.39 89.12 99.87 84.8 17-5 5.0 20 4 106.40 0.15 55.32 82.68 91.40 99.86 86.9 According to experimental data in table 3, the composite plugging acid solution is effective in removing organic and inorganic blockage.
Project number: 2013JK0877.
Online since: July 2011
Authors: Hui Dong Su, Hong Lei Du
TiO2 grain reunion was hindered, which maked the phase change activation energy increasing.
The increasing of the number of photogenerated-hole and hydroxyl radicals, so as to improve the efficiency of the photocatalytic reactions.
And grain size of TiO2 will become bigger after there times according to XRD spectrogram after roast.
Online since: August 2004
Authors: Meng Ju Lin, Heng Rong Guan, Xiao Feng Sun
After aluminizing, the surface of the palladium modified aluminide coating formed in a low activity pack exhibits a rough and convoluted morphology of large grains with markedly wide grain boundaries (Fig.1c), which appears to have no relationship with the surface morphology resulted from diffusion annealing.
The numbers in the first column of Table 2 correspond to the oxidation conditions(temperature and time).
Online since: May 2011
Authors: Jian Wei Ji, Xiao Xuan Qi, Zhong Hu Yuan, Xiao Wei Han
Acknowledgment This work was supported by a grant from Natural Science Foundation of Liaoning Province (Grant number:20102153).
[5] Geng Senlin,Shang Zhiyuan: Research progress and prospects of stored grain insect sound detection technology [J].
Jamieson: On the Scalability of 2-D Wavelet Transform Algorithms on Fine-grained Parallel Machines [C]. in 1996 International Conference on Parallel Processing, Ⅱ24-Ⅱ28
Online since: December 2013
Authors: Zeng Yun Jian, Yan Yan Zhang, Jun Feng Xu, Fang E Chang, Man Zhu
It is also pointed out that the effect of grain size is more sensitive in the near infrared region [12].
It can be seen that, with the increasing of RbI, the grain number increases significantly which can increase the volume fraction of crystallization phase.
Online since: December 2013
Authors: Jiang Feng Dong, Shi Hai Dong, Qingyuan Wang
The basic material properties of wood, where ft is 114.4Mpa; fu is 35.6 Mp; R is 69.0 Mpa; ω is 15%. where ft denotes the tensile strength parallel to the grain of wood, fu said that the compressive strength parallel to the grain of wood, R represents wood bending strength, ω represents moisture.
Table 2 Specimen number and main parameters No.
Online since: October 2012
Authors: Ke Wang, Bin Liu, Guang Jie He, Gu Hua Li, Ming Qiang Xu, Jian Dong Wei
Coarse aggregate: pebble stone, size 5~20mm, meet with Grain composition criterion of the aggregate ( GB/T 14685-2001 of China).
Fine aggregate: grain composition are in the zone II of sand (GB/T 14685-2001 of China); and Mx=2.3.
And the number of control sets was equivalent to that vibrated on the vibrating table.
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