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Journal articles on the topic 'Cavity growth rate'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Xinggang, Jiang, Cui Jianzhong, and Ma Longxiang. "A simple formula for cavity growth rate considering cavity interlinkage during superplastic deformation." Materials Science and Engineering: A 174, no. 1 (1994): L9—L11. http://dx.doi.org/10.1016/0921-5093(94)91122-3.

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2

Nicolaou, P. D., S. L. Semiatin, and A. K. Ghosh. "The dependence of cavity-growth rate on stress triaxiality." Metallurgical and Materials Transactions A 35, no. 7 (2004): 2187–90. http://dx.doi.org/10.1007/s11661-004-0170-0.

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3

Chino, Yasumasa, Hajime Iwasaki, and Mamoru Mabuchi. "Cavity growth rate in superplastic 5083 Al and AZ31 Mg alloys." Journal of Materials Research 19, no. 11 (2004): 3382–88. http://dx.doi.org/10.1557/jmr.2004.0431.

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The plasticity-controlled growth rate of cavities during superplastic deformationwas statistically investigated for 5083 Al alloy and AZ31 Mg alloy. When the cavity growth rate was evaluated on the basis of macroscopic strain calculated using the displacement of the specimen, the growth rate for the Al alloy was larger than thatfor the Mg alloy. However, the growth rate of the Al alloy was in agreement withthat of the Mg alloy when the cavity growth rate was evaluated on the basis of the microscopic strain due to grain boundary sliding. The results obtained lead to two conclusions: (i) the rat

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4

Abeyaratne, Rohan, and Hang-sheng Hou. "Growth of an Infinitesimal Cavity in a Rate-Dependent Solid." Journal of Applied Mechanics 56, no. 1 (1989): 40–46. http://dx.doi.org/10.1115/1.3176063.

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This study examines the effect of rate dependence on growth of an infinitesimal cavity in a homogeneous, isotropic, incompressible material. Specifically, a sphere containing a traction-free void of infinitesimal initial radius is considered, its outer surface being subjected to a prescribed uniform radial nominal stress p, which is suddenly applied and then held constant. The sphere is composed of a particular class of rate-dependent materials. The large strains which occur in the vicinity of the void are accounted for in the analysis, and the problem is reduced to a nonlinear initial value p

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5

Mabuchi, Mamoru, Yasumasa Chino, and Hajime Iwasaki. "An Investigation of Cavity Growth Rate in Superplastic Al and Mg Alloys." Materials Science Forum 475-479 (January 2005): 2945–48. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.2945.

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Fine-grained 5083 Al alloy and AZ91 Mg alloy showed superplastic behavior. The plasticitycontrolled growth rates of cavities during superplastic deformation for the Al alloy and Mg alloy were investigated. The cavity volume fraction for the Mg alloy was larger than that for the Al alloy. However, the cavity growth rate for the Mg alloy was lower than that for the Al alloy.

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6

Lim, Byeongsoo, and Chanseo Jeong. "Effect of Cavity Growth Rate and Cr on High Temperature Crack Growth in P92 and P122 Steels." International Journal of Modern Physics B 17, no. 08n09 (2003): 1627–32. http://dx.doi.org/10.1142/s0217979203019423.

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In this work, the velocity of crack propagation at high temperature was investigated with da / dt - C t relationship using recently developed P92 and P122 steels. Role of cavity in crack growth rate and load line displacement rate was studied by measuring the cavity size and density, which will influence crack nucleation and growth. Since temperature and stress changes are particularly important at high temperature, crack growth behavior was evaluated under various temperature and K i(initial stress intensity factor). Effect of Cr content was evaluated by measuring crack growth activation ener

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7

Lian, J., and M. Suery. "Effect of strain rate sensitivity and cavity growth rate on failure of superplastic material." Materials Science and Technology 2, no. 11 (1986): 1093–98. http://dx.doi.org/10.1179/mst.1986.2.11.1093.

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8

Engelhardt, George, and Digby D. Macdonald. "Estimation of corrosion cavity growth rate for predicting system service life." Corrosion Science 46, no. 5 (2004): 1159–87. http://dx.doi.org/10.1016/j.corsci.2003.09.011.

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9

Jeong, C. S., and Byeong Soo Lim. "Creep Life Evaluation by Micro-Cavities." Key Engineering Materials 297-300 (November 2005): 1858–63. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.1858.

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As the operation time of a power plant increases, the degradation and the cracks inside of the structure exposed to high temperature will increase gradually. Therefore, degradation rate, crack growth rate and fracture life of the structure can be evaluated according to the level of degradation and the growth of crack length. We performed creep rupture test and crack growth test with stress and temperature changes to evaluate the degradation rate, crack growth rate and fracture life. Degradation rate was evaluated using micro-cavities. The area fraction of the cavities increased with the increa

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10

Lim, Byeong Soo, C. S. Jeong, Si Yon Bae, Sung Jin Song, and Yong Hwan Kim. "Prediction of Creep Crack Growth Life Using Backward Radiated Ultrasound." Key Engineering Materials 306-308 (March 2006): 1025–30. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.1025.

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A nondestructive inspection is required to check for defects inside of the actually used components and structures and to confirm their generation and growth rate. Using the backward radiated ultrasonic inspection system, we performed nondestructive inspection of cracks and micro cavities resulting from creep. From the ultrasound test results, the generation and growth of cracks and micro-cavities were confirmed, and the fracture life of the components and structures could be predicted. We confirmed degraded region by crack size and cavity based on the amplitude of the backward radiated ultras

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11

Otsu, Takefumi, Romeo Glovnea, and Joichi Sugimura. "Cavitation Growth Phenomena in Pure-Sliding Grease EHD Contacts." Lubricants 6, no. 3 (2018): 75. http://dx.doi.org/10.3390/lubricants6030075.

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This article describes experimental and theoretical studies on the cavitation phenomena in the grease lubrication film under pure sliding elastohydrodynamic contact. In situ observation tests using the optical interferometry technique were conducted, and the growth of cavitation was captured using a high-speed camera. The results showed that the cavity grew in two stages, which was similar to the behavior in the base oil, and that the cavity growth rate in the initial stage was higher than that in the second stage. In the initial stage, the cavity growth time in the grease was longer than that

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12

Najafi, Mehdi, Seyed Mohammad Esmaiel Jalali, Reza KhaloKakaie, and Farrokh Forouhandeh. "Prediction of cavity growth rate during underground coal gasification using multiple regression analysis." International Journal of Coal Science & Technology 2, no. 4 (2015): 318–24. http://dx.doi.org/10.1007/s40789-015-0095-9.

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13

Ko, Young Gun, Dong Hyuk Shin, and Chong Soo Lee. "Cavitation damage incorporating cavity growth in submicrometer-grained titanium alloy." Journal of Materials Research 24, no. 6 (2009): 2161–65. http://dx.doi.org/10.1557/jmr.2009.0254.

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A study was made to investigate cavity growth behavior during the superplastic deformation of submicrometer-grained titanium alloy and to compare that to cavity growth in a coarse-grained counterpart. A series of tension tests were performed at a temperature of 973 K and a strain rate of 10−4 s−1. Microstructures revealed that both the size and the volume fraction of the cavities obviously decreased as the grain size decreased. Working within the framework provided by creep models for understanding cavity growth behavior, we found the dominant growth mechanism to be superplastic diffusion, whi

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14

Patrut, Adrian, Diana H. Mayne, Karl F. von Reden, et al. "Age and Growth Rate Dynamics of an Old African Baobab Determined by Radiocarbon Dating." Radiocarbon 52, no. 2 (2010): 727–34. http://dx.doi.org/10.1017/s0033822200045744.

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In 2008, a large African baobab (Adansonia digitata L.) from Makulu Makete, South Africa, split vertically into 2 sections, revealing a large enclosed cavity. Several wood samples collected from the cavity were processed and radiocarbon dated by accelerator mass spectrometry (AMS) for determining the age and growth rate dynamics of the tree. The 14C date of the oldest sample was found to be of 1016 ± 22 BP, which corresponds to a calibrated age of 1000 ± 15 yr. Thus, the Makulu Makete tree, which eventually collapsed to the ground and died, becomes the second oldest African baobab dated accura

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15

Arioka, Koji, Roger W. Staehle, Robert L. Tapping, Takuyo Yamada, and Tomoki Miyamoto. "Stress Corrosion Cracking Growth of Alloy 800NG in Pressurized Water Reactor Primary Water." Corrosion 74, no. 1 (2017): 24–36. http://dx.doi.org/10.5006/2572.

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The primary purpose of this research is to examine the stress corrosion cracking (SCC) resistance of Alloy 800NG in pressurized water reactor (PWR) primary water and pressurized heavy water reactor (PHWR) primary water. Rates of SCC growth of 20% cold-worked (CW) Alloy 800NG measured over the temperature range between 270°C and 360°C were compared with previously reported results for 20% CW Alloy TT690 and 20% CW Alloy 600 in order to consider which material is the most SCC resistant among materials presently being used for steam generator (SG) tubing worldwide. The secondary purpose is to exa

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16

Beresh, Steven J., Justin L. Wagner, and Katya M. Casper. "Compressibility effects in the shear layer over a rectangular cavity." Journal of Fluid Mechanics 808 (October 26, 2016): 116–52. http://dx.doi.org/10.1017/jfm.2016.540.

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The influence of compressibility on the shear layer over a rectangular cavity of variable width has been studied in a free stream Mach number range of 0.6–2.5 using particle image velocimetry data in the streamwise centre plane. As the Mach number increases, the vertical component of the turbulence intensity diminishes modestly in the widest cavity, but the two narrower cavities show a more substantial drop in all three components as well as the turbulent shear stress. This contrasts with canonical free shear layers, which show significant reductions in only the vertical component and the turb

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17

Al-Halbouni, Djamil, Eoghan P. Holohan, Abbas Taheri, et al. "Distinct element geomechanical modelling of the formation of sinkhole clusters within large-scale karstic depressions." Solid Earth 10, no. 4 (2019): 1219–41. http://dx.doi.org/10.5194/se-10-1219-2019.

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Abstract. The 2-D distinct element method (DEM) code (PFC2D_V5) is used here to simulate the evolution of subsidence-related karst landforms, such as single and clustered sinkholes, and associated larger-scale depressions. Subsurface material in the DEM model is removed progressively to produce an array of cavities; this simulates a network of subsurface groundwater conduits growing by chemical/mechanical erosion. The growth of the cavity array is coupled mechanically to the gravitationally loaded surroundings, such that cavities can grow also in part by material failure at their margins, whic

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18

Liu, Zhang Guang, and Pei Jie Li. "Superplastic Deformation Behavior and Cavity Formation of Ti55 Titanium Alloy." Materials Science Forum 913 (February 2018): 102–8. http://dx.doi.org/10.4028/www.scientific.net/msf.913.102.

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Ti55 is a type of new near-α titanium alloy featuring good heat resistance and thermal stability at a temperature below 550°C. This paper explores the superplastic behaviors of Ti55 titanium alloy sheets at high temperature. The results showed that at a strain rate between 8.3×10-4 and 1.32×10-2s-1 and a deformation temperature between 885 and 935°C, this material exhibited favorable superplasticity. A 872% tensile elongation was achieved even at a high temperature of 925°C and a high strain rate of 1.32×10-2s-1. For a deformation temperature of 925°C and a strain rate range of 8.3×10-4～1.32×1

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19

Jeong, Chan Seo, Si Yeon Bae, and Byeong Soo Lim. "The Effect of Cavity on the Creep Fracture in P92 and P122 Steels and Its Detection by Intelligent Phased Array Ultrasound." Key Engineering Materials 321-323 (October 2006): 620–23. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.620.

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The results of cavity inspection in uniaxial creep tests and creep crack growth tests were compared to determine the cavity effect. The quantity of the cavities increased with increasing strain and crack growth rate as stress and temperature were increased. This resulted in the change of da/dt vs Ct. The increased rate in the number and size of the cavities in P92 steel with temperature was relatively fast, resulting in the high rate of da/dt against Ct. In this study, to determine the characteristics of defects in structure, the sub surface defects of P92 and P122 steels were investigated by

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20

Oesau, S., G. Thaller, C. Schulz, and J. Tetens. "Application of PIT tags for individual identification of turbot (<i>Scophthalmus maximus</i>)." Archives Animal Breeding 56, no. 1 (2013): 285–92. http://dx.doi.org/10.7482/0003-9438-56-028.

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Abstract. Passive integrated transponder (PIT) tags only work in very close proximity of the receiver (cm distance). Therefore, active transponders are mainly used in behavioural monitoring. In the present study, the effects of intraabdominal implantation of PIT tags on survival, well-being and growth performance of juvenile turbot (Scophthalmus maximus) were investigated. Furthermore, the tag retention rate and read out error rate of all tags were examined. Passive integrated transponder tags were implanted in the abdominal cavity of nearly 6 000 turbots. All tags were readout and checked for

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21

Li, Sheng, Shunyao Jin, and Zhongguo Huang. "Cavity Behavior of Fine-Grained 5A70 Aluminum Alloy during Superplastic Formation." Metals 8, no. 12 (2018): 1065. http://dx.doi.org/10.3390/met8121065.

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The study of the exact physical mechanism of cavity nucleation and growth is significant in terms of predicting the extent of internal damage following superplastic deformation. The 5A70 alloy was processed by cold rolling for 14 passes with a total reduction deformation of 90% (20–2 mm) and the heat treatment was inserted at a thickness of 10 and 5 mm at 340 °C for 30 min. The superplastic tensile tests were performed at 400, 450, 500, 550 °C and the initial strain rate was 1 10−3 s−1. Cavities were observed at the head of the particle and the interface of the grain boundaries. It is suggeste

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22

Mohan, R., J. Zhang, and F. W. Brust. "Effect of Elastic Accommodation on Diffusion-Controlled Cavity Growth in Metals." Journal of Engineering Materials and Technology 122, no. 3 (2000): 294–99. http://dx.doi.org/10.1115/1.482800.

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The effect of elastic accommodation on the grain boundary diffusion-controlled void growth was analyzed using an axisymmetric unit cell model. An incremental form of the virtual work principle was used to formulate the boundary value problem involving grain boundary diffusion. The model accounts for material elasticity and void interaction effects. Analyses are performed for initially spherical voids spaced periodically along the grain boundary. The results of the analyses on void growth rates agree well with the Hull-Rimmer model after the initial transient time. During the elastic transient,

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23

Song, Mei Juan, Chuan Hui Huang, Min He, Xiao Dong Luo, and Ya Mei Wu. "Superplastic Instability and Damage Evolution of AZ31B Magnesium Alloy Shee." Materials Science Forum 816 (April 2015): 451–58. http://dx.doi.org/10.4028/www.scientific.net/msf.816.451.

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Superplastic instability and damage evolution of AZ31B magnesium alloy sheet were investigated in this paper. Maximum elongation of 216% and strain rate sensitivity of 0.36 were obtained at 723k and a strain rate of 1×10-3s-1, whose fracture was due to the growth and interlinkage of cavities that nucleated at grain boundary. After superplastic tensile tests and quantitative analysis of cavity volume fraction, A cavity growth model were established, and the damage evolution equation based on the law of the micro-damage evolution and statistical mechanics was derived out, and damage characterist

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24

刘, 芸. "Molecular Dynamics Study of High Strain Rate of Single Crystal Copper Cavity Nucleation and Growth Process." Journal of Advances in Physical Chemistry 07, no. 02 (2018): 104–10. http://dx.doi.org/10.12677/japc.2018.72013.

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25

Citro, Vincenzo, Flavio Giannetti, Luca Brandt, and Paolo Luchini. "Linear three-dimensional global and asymptotic stability analysis of incompressible open cavity flow." Journal of Fluid Mechanics 768 (March 4, 2015): 113–40. http://dx.doi.org/10.1017/jfm.2015.72.

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The viscous and inviscid linear stability of the incompressible flow past a square open cavity is studied numerically. The analysis shows that the flow first undergoes a steady three-dimensional bifurcation at a critical Reynolds number of 1370. The critical mode is localized inside the cavity and has a flat roll structure with a spanwise wavelength of about 0.47 cavity depths. The adjoint global mode reveals that the instability is most efficiently triggered in the thin region close to the upstream tip of the cavity. The structural sensitivity analysis identifies the wavemaker as the region l

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26

Gao, Qian, Yan Bing Shen, Wei Huang, and Min Wang. "Effect of Natural Cyclodextrins on Cell Growth, Activity and Permeability of Arthrobacter simplex." Applied Mechanics and Materials 730 (January 2015): 249–53. http://dx.doi.org/10.4028/www.scientific.net/amm.730.249.

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In this study, the biotransformation which from cortisone acetate (CA) to prednisone acetate (PA) by Arthrobacter simplex (ASP) was selected as a model system for evaluating the effects of natural cyclodextrins (α-CD, β-CD and γ-CD, referred as CDs) on cell growth, dehydrogenase activity, permeability of Arthrobacter simplex. The results showed that the cavity size of cyclodextrins on ASP cell growth were quite different, the with smaller cavity significantly inhibited ASP growth. CDs reduced the dehydrogenase activity of ASP and increased the cell permeability. Initial conversion rate of cell

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27

Wang, Min, Hong Zhen Guo, and Y. J. Liu. "Cavity of Al-Cu-Mg Alloy during Superplastic Deformation." Materials Science Forum 551-552 (July 2007): 645–50. http://dx.doi.org/10.4028/www.scientific.net/msf.551-552.645.

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According to the characteristic of appearing cavitation in the metals during superplastic deformation, the influence of strain rate on cavity evolvement, the influence of cavity on superplastic deformation capability, and the formation, development process of cavity were investigated for Al-Cu-Mg alloy (i.e. coarse–grained LY12). The results show that: ①The pore nucleation occurs not only at triangle grain boundaries, but also along nearby the second phase particles, and even within grains. The cavities at the triangle grain boundaries are present in V-shape, others near the second phase parti

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28

Zhu, X. J., Ming Jen Tan, and K. M. Liew. "Superplasticity in CP-Titanium Alloys." Materials Science Forum 551-552 (July 2007): 373–78. http://dx.doi.org/10.4028/www.scientific.net/msf.551-552.373.

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In this work, studies were carried out to investigate the superplasticity of a commercially pure (CP) titanium alloy during high temperature deformation. Uniaxial tensile tests were carried out at 600, 750 and 800°C with an initial strain rate from 10-1s-1 to 10-4s-1. It was found that the alloy do not show good superplasticity due fast grain growth at high temperature and cavity. The effects of temperature on the grain growth and cavity phenomena as well as the dynamic recrystallization of the alloy were studied and a ‘two-step-method’ was introduced to increase the superplasticity of the all

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29

Graveland-Bikker, J. F., G. Fritz, O. Glatter та C. G. de Kruif. "Growth and structure of α-lactalbumin nanotubes". Journal of Applied Crystallography 39, № 2 (2006): 180–84. http://dx.doi.org/10.1107/s0021889805043244.

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Partial hydrolysis of α-lactalbumin by a protease fromBacillus licheniformisunder appropriate conditions leads to the formation of nanotubular structures. The growth of α-lactalbumin nanotubes and their dimensions were analysed using transmission electron microscopy, static light scattering and small-angle X-ray scattering. The scattering data were fitted using a model describing the growth of the tubes and using the form factor of a hollow tube. The cylinder diameter was calculated to be 19.9 (2) nm and the cavity diameter 8.7 (7) nm. The elongation rate of the nanotubes was about 10 nm min−1

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30

An, Jiadai, Xianying Dai, Lansheng Feng, et al. "Design and Process Optimization of a New Reaction Cavity for High-Temperature MOCVD AlGaN Growth." Nano 16, no. 07 (2021): 2150084. http://dx.doi.org/10.1142/s1793292021500843.

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AlGaN offers new opportunities for the development of the solid-state ultraviolet (UV) luminescence, detectors and high-power electronic devices, however, problems such as low growth rate and poor crystallization quality are common in the growing process of AlGaN material. In this paper, a new reaction cavity for high-temperature MOCVD AlGaN growth was carried out through the research of resistance heated, and the thermal field of high-temperature MOCVD growth was numerically simulated. Based on the high-temperature MOCVD reaction cavity, an orthogonal experimental method was used to simulate

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31

Jeong, C. S., Si Yon Bae, and Byeong Soo Lim. "Creep Crack Growth in P92 and P122 Alloy Steel Weldment." Key Engineering Materials 297-300 (November 2005): 446–51. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.446.

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The structures connected by welding are fractured often in Heat Affected Zone (HAZ) when cracks grow under high-temperature and high-pressure conditions. In this study, the creep crack growth tests of P92 and P122 steels were performed and the creep fracture characteristics were evaluated. Degradation rate by cavities was investigated and the influence of degradation rate on crack growth rate was evaluated. Crack growth rate of new material was compared with that of the degraded material to confirm the influence of the degradation rate by cavities on the crack growth rate. From these results,

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32

Jeong, C. S., and Byeong Soo Lim. "Analysis of Creep Crack Growth by Intelligent Phased Array Ultrasonic Inspection." Key Engineering Materials 261-263 (April 2004): 1319–24. http://dx.doi.org/10.4028/www.scientific.net/kem.261-263.1319.

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At high temperatures typical for service conditions in fossil power plants, the creep fracture is dominated by the formation, growth and coalescence of cavities. Using high temperature pipe materials, P92 and P122, the characteristics of creep crack growth were analyzed in this study according to the cavities. The characteristics of cavities play a critical role in creep crack propagation and load line displacement. The effect of the load line displacement rate(dv/dt) and crack growth rate(da/dt) on the da/dt–Ct relation of creep crack growth was evaluated at different temperatures and Ki(init

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33

Nunpan, Santichai, Chatrudee Suwannachart, and Kornchanok Wayakanon. "Effect of Prebiotics-Enhanced Probiotics on the Growth ofStreptococcus mutans." International Journal of Microbiology 2019 (August 1, 2019): 1–7. http://dx.doi.org/10.1155/2019/4623807.

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Streptococcus mutanspredominantly creates an acidic environment in an oral cavity. This results in dental demineralization and carious lesions. The probiotics are beneficial microorganisms that modulate the bacterial balance in the digestive system. Prebiotics are defined as nondigestible oligosaccharides that are utilized for the selective stimulation of the beneficial microorganisms. The objective of this study was to evaluate the efficacy of the prebiotics, galactooligosaccharides (GOS) and fructooligosaccharides (FOS), for enhancing the probioticLactobacillus acidophilusATCC 4356, for inhi

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34

Ortiz, G. G., S. Q. Luong, S. Z. Sun, et al. "Monolithic, multiple-wavelength vertical-cavity surface-emitting laser arrays by surface-controlled MOCVD growth rate enhancement and reduction." IEEE Photonics Technology Letters 9, no. 8 (1997): 1069–71. http://dx.doi.org/10.1109/68.605502.

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Li, Yadong, Yong Li, Liangchao Chen, et al. "Studies on the mechanism of large cavity to improve the growth rate of large diamond under HPHT conditions." Journal of Crystal Growth 515 (June 2019): 66–71. http://dx.doi.org/10.1016/j.jcrysgro.2019.03.016.

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36

Burinskaya, T. M., and J. L. Rauch. "Auroral kilometric radiation from a nonstationary thin plasma cavity." Annales Geophysicae 30, no. 7 (2012): 1093–97. http://dx.doi.org/10.5194/angeo-30-1093-2012.

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Abstract. Results obtained using a waveguide model of the AKR generation in thin plasma cavities are presented. Taking into account the occurrence of low frequency plasma motion in the regions of the AKR generation, we have considered a wave escape from a thin plasma cavity with adiabatically slowly varying width, and show that there can exist localized regions of instability from which the extraordinary X-mode waves, growing in time, can be radiated outwards. It has been found that waves, propagating quasi-tangentially to the source frontiers, have the maximum growth rate and escape outward m

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37

Sun, Guoli L., Irina G. Galben-Sandulache, Thierry Ouisse, et al. "Improvements of the Continuous Feed-Physical Vapor Transport Technique (CF-PVT) for the Seeded Growth of 3C-SiC Crystals." Materials Science Forum 645-648 (April 2010): 63–66. http://dx.doi.org/10.4028/www.scientific.net/msf.645-648.63.

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The Continuous Feed-Physical Vapor Transport Technique (CF-PVT) was optimized by considering the heating, thermal insulation and the geometry of growth cavity. The effects of seeds on the surface morphology of the grown layer have been discussed. We successfully grew 3C-SiC bulk with a diameter of 7.0 mm and 3.3 mm in height with a high growth rate of 0.8 mm/h by the CF-PVT technique.

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Gupta, M. K., Ajit Joshi, Monica Mahajan, and Akshay Mishra. "Gigantic Reactive Lesion of Mandibular Gingival Tissue." International Journal of Medical and Surgical Sciences 4, no. 1 (2018): 1115–18. http://dx.doi.org/10.32457/ijmss.2017.004.

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Irritation fibroma are the most common form of reactive lesions found within the oral cavity. These lesions normally attain a small size and show a slow growth rate. This paper reports a case of gigantic intraoral irritational fibroma with a history of rapid growth. Complete excision was performed and the specimen was sent for immunohistochemistry (IHC) staining. It was found positive for vimentin, hence reported as irritation fibroma.

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39

Vafaei, Saeid, and Hyungdae Kim. "Single Bubble Boiling from an Artificial Cavity." Journal of Nanofluids 8, no. 8 (2019): 1617–31. http://dx.doi.org/10.1166/jon.2019.1719.

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Pool boiling heat transfer is an aggressive and complex phenomenon which needs to be simplified for a better understanding of the mechanism of bubble growth and departure and how boiling heat transfer can be enhanced. Single bubble boiling heat transfer is a simple version of boiling phenomenon which has been used to study the effective elements on pool boiling heat transfer. The purpose of the present review paper is to understand how to produce single bubble pool boiling on a heated substrate and investigate, how single bubble boiling phenomenon can be affected by geometry of cavities, cavit

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40

Choquette, Kent D. "Vertical-Cavity Surface-Emitting Lasers: Light for the Information Age." MRS Bulletin 27, no. 7 (2002): 507–11. http://dx.doi.org/10.1557/mrs2002.168.

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AbstractThe emergence of miniature light sources such as the vertical-cavity surface-emitting laser (VCSEL) is poised to advance the information age. The development of VCSELs has stimulated a wide range of materials research into epitaxial growth and device-fabrication technologies. In this article, current and emerging applications that are guiding the commercial development of VCSELs are first considered, followed by discussions of the VCSEL epitaxial structure and fabrication technologies. This brief overview will also mention recent efforts aimed at achieving long-wavelength VCSELs grown

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Lim, Byeong Soo, and Bum Joon Kim. "Influence of Hold Time on Creep-Fatigue Life and Metallurgical Degradation at High Temperature." Key Engineering Materials 306-308 (March 2006): 1013–18. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.1013.

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This paper investigates the influence of various hold times on creep-fatigue life at 600oC. The relationship between the crack growth behavior and hold time was studied, and a metallurigical investigation to examine the effect of creep was performed. To examine the relationship between creep-fatigue life and microvoids, the fraction of micro-voids/cavity area was analyzed at the crack tip. The crack growth rate of the HAZ was found to be faster than that of base metal while creep-fatigue life was found to be shorter. Finally, it can be stated that the fraction of cavity area, Fca could be util

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Ko, Young Gun, Yong Nam Kwon, Jung Hwan Lee, Dong Hyuk Shin, and Chong Soo Lee. "Cavitation Behavior of Ultra-Fine Grained Ti-6Al-4V Alloy Produced by Equal-Channel Angular Pressing." Materials Science Forum 551-552 (July 2007): 621–26. http://dx.doi.org/10.4028/www.scientific.net/msf.551-552.621.

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Cavitation behavior during superplastic flow of ultra-fine grained (UFG) Ti-6Al-4V alloy was established with the variation of grain size and misorientation. After imposing an effective strainup to 8 via equal-channel angular pressing (ECAP) at 873 K, alpha-phase grains were markedly refined from 11 μm to ≈ 0.3 μm, and misorientation angle was increased. Uniaxial-tension tests were conducted for initial coarse grained (CG) and two UFG alloys (ε = 4 and 8) at temperature of 973 K and strain rate of 10-4 s-1. Quantitative measurements of cavitation evidenced that both the average size and the ar

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Zhang, Chong Hong, Yue Sheng Wang, K. Q. Chen, Ji Guo Sun, J. M. Quan, and Chang Qi Chen. "A TEM Study of Cavity Structures in a Fe-Cr-Mn Alloy and a 316L Stainless Steel Heavily Irradiated with 92 MeV Ar Ions." Materials Science Forum 475-479 (January 2005): 1459–62. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.1459.

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Low-activation Fe-Cr-Mn alloy and 316L stainless steel were irradiated with 92 MeV Ar ions at about 500°C, to fluences of 0.8~1.7×1021 ions m-2 .After irradiation, cross-sectional specimens were investigated with transmission electron microscopy.Cavities with high number density were observed in the peak dose regions. The cavity number density reaches maximum at Ar concentration peak, while cavity mean size is consistent with displacement damage profile. It is indicated that Ar atoms can enhance cavity formation in a manner similar to helium. There are thresholds of dose and dose rate for the

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Wada, Shuichi, Mamoru Mabuchi, Kenji Higashi, and Terence G. Langdon. "A quantitative analysis of cavitation in Al–Cu–Mg metal matrix composites exhibiting high strain rate superplasticity." Journal of Materials Research 11, no. 7 (1996): 1755–64. http://dx.doi.org/10.1557/jmr.1996.0220.

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Specimens of two Al–Cu–Mg (2124) composites, reinforced with 20 vol% of either Si3N4 particulates or Si3N4 whiskers, were tested under experimental conditions close to those for optimum high strain rate superplasticity. Both composites developed extensive internal cavitation during testing, but quantitative measurements show that significant cavity growth occurs throughout the test in the whisker-reinforced composite, but only at strains ≥1.0 in the particulate-reinforced composite. This difference in behavior is attributed to differences in the extent of a discontinuous liquid phase at the gr

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Gou, Yudan, Jun Wang, Yang Cheng, Yintao Guo, Xiao Xiao, and Shouhuan Zhou. "A Modeling and Experimental Study on the Growth of VCSEL Materials Using an 8 × 6 Inch Planetary MOCVD Reactor." Coatings 10, no. 8 (2020): 797. http://dx.doi.org/10.3390/coatings10080797.

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VCSEL (vertical cavity surface emitting laser) is a promising optoelectronic device, but its high manufacturing cost limits its scope of applications. Growing on larger size wafers is an effective way to reduce the cost. However, the growth rate uniformity needs to be optimized to ensure the uniformity of the devices’ performance over the wafers. This paper investigates the factors which influence the growth rate uniformity using an 8 × 6 inch planetary reactor through experiments and simulations. At a carrier gas flow rate of 37 slm, an AsH3 flow rate of 600 sccm, an AsH3 flow rate ratio of 1

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Liew, K. M., H. Tan, and M. J. Tan. "Finite Element Modeling of Superplastic Sheet Metal Forming for Cavity Sensitive Materials." Journal of Engineering Materials and Technology 125, no. 3 (2003): 256–59. http://dx.doi.org/10.1115/1.1584491.

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In this paper, a constitutive equation for superplasticity, which is based on the microstructural mechanism of superplastic deformation taking into account the effects of deformation damage, is incorporated into the finite element method to simulate the superplastic forming process. The effects of strain rate sensitivity, cavity growth and imposed hydrostatic pressure on the strain limit are studied. The predicted results are validated through the comparison with the existing experimental data. It is found that the present model produces accurate results in all cases.

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James, L. A., H. B. Lee, G. L. Wire, S. R. Novak, and W. H. Cullen. "Corrosion Fatigue Crack Growth in Clad Low-Alloy Steels—Part II: Water Flow Rate Effects in High-Sulfur Plate Steel." Journal of Pressure Vessel Technology 119, no. 3 (1997): 255–63. http://dx.doi.org/10.1115/1.2842302.

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Corrosion fatigue crack propagation tests were conducted on a high-sulfur ASTM A302-B plate steel overlaid with weld-deposited Alloy EN82H cladding. The specimens featured semi-elliptical surface cracks penetrating approximately 6.3 mm of cladding into the underlying steel. The initial crack sizes were relatively large with surface lengths of 22.8–27.3 mm, and depths of 10.5–14.1 mm. The experiments were initiated in a quasi-stagnant low-oxygen (O2 < 10 pph) aqueous environment at 243°C, under loading conditions (ΔK, R, cyclic frequency) conducive to environmentally assisted cracking (EAC)

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Леденцов, Н. Н., В. А. Щукин, V. P. Kalosha та ін. "Дизайн и новая функциональность антиволноводных вертикально-излучающих лазеров на длину волны 850 nm". Письма в журнал технической физики 44, № 1 (2018): 85. http://dx.doi.org/10.21883/pjtf.2018.01.45434.17017.

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AbstractVertical-cavity surface-emitting lasers (VCSELs) with an aperture limited by an oxide and a resonance cavity based on GaAlAs with high Al content provide a maximum γ factor (λ/2 design) and suppression of optical power beyond the aperture. A VCSEL with two coupled cavities provides additional sharp growth of the loss of high-order lateral modes by leakage to the oxidized region and provides single-mode laser generation for an aperture diameter of up to 5 μm. Single-mode antiwaveguiding VCSELs provide ultrafast data transmission with a rate of up to 160 Gbit/s. The structure in which th

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Marbacher, Serge, Stefan Wanderer, Fabio Strange, Basil E. Grüter, and Javier Fandino. "Saccular Aneurysm Models Featuring Growth and Rupture: A Systematic Review." Brain Sciences 10, no. 2 (2020): 101. http://dx.doi.org/10.3390/brainsci10020101.

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Background. Most available large animal extracranial aneurysm models feature healthy non-degenerated aneurysm pouches with stable long-term follow-ups and extensive healing reactions after endovascular treatment. This review focuses on a small subgroup of extracranial aneurysm models that demonstrated growth and potential rupture during follow-up. Methods. The literature was searched in Medline/Pubmed to identify extracranial in vivo saccular aneurysm models featuring growth and rupture, using a predefined search strategy in accordance with the PRISMA guidelines. From eligible studies we extra

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Zhao, Yu, Guoyu Wang, and Biao Huang. "Vortex structure analysis of unsteady cloud cavitating flows around a hydrofoil." Modern Physics Letters B 30, no. 02 (2016): 1550275. http://dx.doi.org/10.1142/s0217984915502759.

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In this paper, time dependent vortex structures are numerically analyzed for both noncavitating and cloud cavitating flows around a Clark-Y hydrofoil with angle of attack [Formula: see text] at a moderate Reynolds number, [Formula: see text]. The numerical simulations are performed using a transport equation-based cavitation model and the large eddy simulation (LES) approach with a classical eddy viscosity subgrid scale (SGS) model. Compared with experimental results, present numerical predictions are capable of capturing the initiation of cavity, growth toward the trailing edge and subsequent

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