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Online since: March 2007
Authors: Koichi Tsuchiya, Minoru Umemoto, Yoshikazu Todaka, Adrian Sandu, Shinya Yamamoto, Masayuki Tabuchi
Thus there have been number of investigations on Ti-Zr-Ni alloys aiming for high temperature shape memory alloys [3-9].
These precipitates are uniformly distributed through out the B2 grains and the region near the grain boundaries as well as the interphase boundaries with Laves phase (Ti, Zr)2Ni, which is occasionally found.
Online since: November 2005
Authors: Rubens Maribondo Nascimento, Michelle P. Távora, Domingos S. Paulo, Jorge H. Echude-Silva, Clodomiro Alves Jr., Antonio Eduardo Martinelli
Increasing the milling time to 20 h increased the number of hard NbC particles mechanically aggregated to iron particles, thus improving the distribution of the reinforcing phase and the overall property homogenization of the composite.
Increasing the temperature, grain boundary and volumetric diffusion were activated affecting the slope of the dilatometric curve (~800 °C)
It consists of regular grains of the matrix surrounded by carbide particles and solidified liquid phase.
Online since: March 2006
Authors: Gunther F. Eggeler, Dieter M. Herlach, Matthias Kolbe, Thomas Lierfeld
Introduction A great number of studies investigated the interaction of a planar solid/liquid interface with inert particles since 1964 [1-5].
Metallic and ceramic powders with the same order of grain size (Ø 10 µm) were mixed by mortar and pestle in a glove box under pure Argon-Atmosphere (Argon 4.0, purified, <1ppm O2, <1ppm H2O).
The Nickel matrix (grey) shows a grain refined structure due to the large undercooling of 150 K.
Online since: May 2012
Authors: Takatomo Sasaki, Yusuke Mori, Yasuo Kitaoka, Masashi Yoshimura, Mamoru Imade, Hideo Takazawa, Yusuke Konishi, Kosuke Murakami, Hiroki Imabayashi, Yuma Todoroki, Akira Kitamoto, Mihoko Maruyama, Daisuke Matsuo
The seeded growth of GaN single crystals on high-quality GaN seeds by this method has the advantage of producing high-crystallinity GaN single crystals, but the growth habit of bulk crystals must be controlled, as the shape of the resulting bulk crystal detemines the number of wafers that can be produced.
A seed crystal was placed in a ceramic crucible, and the starting materials (metallic Ga (purity: 6N), metallic Na (purity: 4N), and graphite grains (purity: 6N)) were added to the crucible in an Ar-filled globe box.
Graphite grains were added to prevent the growth of polycrystals on the crucible wall.
Online since: June 2011
Authors: Hélio Goldenstein, Linilson R. Padovese, Paula F. S. Farina, Edgar A. Huallpa, Julio Capo
Precipitates, grain boundaries, dislocations and stress fields act as effective barriers to domain wall motion so that MBN is sensitive to microstructure, elastic and plastic deformation in ferromagnetic materials [1,2].
Vincent et al. [5] have used MBN for investigating strain induced α’-martensite during low cycle fatigue of stainless steels, Błachnio [6] has shown that the any change in dislocation distribution and the accompanying increase in the misorientation of sub-grains as well as the modification of retained austenite precipitates both considerably affect MBN intensity.
There are a number of problems in the experimental investigation of martensitic transformations that have challenged the creativity of experimental metallurgists.
Online since: September 2013
Authors: Bai Tao Sun, Qiang Zhou
A large number of buildings damaged in this earthquake and provides us valuable data.
In fact, brick-timber structures have fewer floors and less vertical load; and wood has great performances of elasticity, tension along the grain and shear across the grain; the roof can form a good space system with around walls by the lateral brace.
Online since: August 2012
Authors: Claudinei dos Santos, Durval Rodrigues Júnior, Daltro Garcia Pinatti, Felipe Antunes Santos, Erika Davim, Maria Helena F. V. Fernandes
The transitions peaks tend to dislocate ourselves to major temperatures with grain size or/and heat rate increases 1-2.
Besides the oxide complexities, in others words the number of different elements, visualized in XRF for raw silica can also affect the peak position.
It also may be noted the grain morphology changing increasing heat treatments temperature.
Online since: February 2014
Authors: Bing Xi Li, Yuan Ting Cao, Wen Zhong Ma
Chang 81 sand groups are chiefly middle grained sandstone with subangular grain.
Feldspar is the main dissolvable mineral in study area, well developed in this area, the dissolution can form a certain number of intragranular dissolved pores (fig.4-b).
Online since: August 2015
Authors: Stefanie Reese, Marek Fassin, Stephan Wulfinghoff
The convergence behavior of the two algorithms is studied and compared regarding the number of time steps.
In order to compare the two time integration algorithms a study of convergence regarding the number of time steps was carried out.
Fig. 3: Convergence behavior for the two time integration algorithms with respect to the number of time steps.
Moreover it showed up, that already for a small number of time steps satisfying results were obtained for both solution algorithms.
A gradient plasticity grain boundary yield theory.
Online since: January 2023
Authors: Nurriswin Jumadi, Nadlene Razali, Nadia Razali, Yusriah Lazim
Sieve analysis was used to determine the aggregate grain size distribution, as in Fig 1.
The R30, R40 and R50 samples showed an increase in the number of compressive strengths, but the strengths did not surpass R0.
Referring to grain size distribution (Fig 1), the range size of ESP is smaller than river sand.
A similar result was reported by [42], the reduction of carbonation depth due to the presence of ESP which reduces the number of pores in the concrete.
So, these properties have influenced the size and number of pores in the mortar specimen by forming a denser mortar packing compound.
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