Materials Literature
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摘要： 针对腐蚀对套管强度时变性影响，采用双重迭代试算法结合压力温度耦合作用，计算井筒内压力、温度沿井深方向分布情况，依据Norsok模型得到全井套管柱CO2腐蚀速率计算预测模型。依据试井理论利用现场录测井口压力数据回归得到气井稳产阶段井口压力随时间变化函数关系，将定产降压阶段内的压力温度时变规律引入腐蚀速率预测模型，建立CO2腐蚀环境下全井套管柱剩余强度时变性分析系统，通过对均匀腐蚀套管强度实例计算结果表明：腐蚀引起的壁厚减薄使得套管柱剩余强度随时间增加逐年降低，稳产阶段初期下降最快，随时间增加下降趋势逐渐减缓，其沿井深分布规律与腐蚀速率变化规律相似；套管极限抗挤毁强度受均匀腐蚀影响显著，其降低程度高于套管极限抗内压强度和管体抗…
The fascinating properties of molybdenum disulfide (MoS2) atomic layers have recently been found to support novel physics, such as valleytronics and the quantum Hall effect. The facile and potentially useful semiconducting (2H) to metallic (1T) phase transitions in MoS2 may be exploited as a means of controlling the e…
The inhibition effect of three nonionic inhibitors on carbon steel corrosion in 1M H 2 SO 4 was studied gravimetrically and electrochemically. Increasing the number of triethanolamine units in the inhibitor molecules increases their inhibition efficiencies. The inhibiting action of inhibitors was attributed to their a…
The present study was aimed to evaluate the effect of dual stressors cadmium (Cd) and Aeromonas hydrophila (AH) on pro-and antioxidant status in gills, kidneys and liver tissues of fishes, Catla catla treated with or without silver nano-particles. Significant elevation in the lipid peroxidation levels with a significa…
The processes of recovery and recrystallization in oxygen-free copper were observed in detail in the same area of a specimen using an SEM(scanning electron microscopy)-EBSD(electron back scatter diffraction) system. Specimens were solution heat-treated at 823 K for 3.6 ks. Then, the specimens were cold-rolled at a red…
Load carrying capacity of austenitic stainless steel component is increased due to hardening caused by neutron irradiation if no crack is included in the component. On the other hand, if a crack is initiated in the reactor components, the hardening may decrease the load carrying capacity due to reduction in fracture t…
Carbon nanoparticles were synthesized via hydrothermal oxidation of glucose.The carbon dots were characterized by X-ray diffraction( XRD),transmission electron microscopy( TEM), ultraviolet-visible spectrophotometry,fluorescene spectrophotometry and Fourier transform infrared spectrophoto-metry( FTIR).The results indi…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation A. Vinesh, V. D. Sudheesh, N. Lakshmi, K. Venugopalan; B2+L21 ordering in Co2MnAl Heusler alloy.…
We are currently developing an external-heating-type superconducting magnesium diboride (MgB2) level sensor for a liquid hydrogen tank. The heating effect of an external heater on an 800-mm-long MgB2 level sensor was previously reported. However, the heating effect of an external heater on the MgB2 level sensor has no…
The aim of the present work is a spectroscopic and thermodynamic study of DNA catalytic properties in the following processes: a) redox; b) formation of interstrand crosslinks; c) performing of photodynamic effects; d) nanoscale resonance radiationless electron excitation energy transfer. The most attention is paid to…
The electric process has the advantage such as the low amount of CO2 emission. But, the tramp elements such as Cu and Sn contained in steel are retained in the puddling process. These tramp elements cause surface cracking of steel during hot rolling process. The surface hot shortness is suppressed by addition of Ni. T…
We have established a biaxial tensile test method suitable for the measurement of the local plastic deformation characteristics of a hard aluminum alloy sheet 3104-H, which is a typical material for aluminum can bodies, as a representative of the low work hardening materials. The present method consists of the followi…
This work presents neutronic analyses to support the design of the test facility of the International Fusion Materials Irradiation Facility (IFMIF) in the framework of the Broader Approach activities. In order to evaluate the necessary biological shielding thickness and the reliability of remote handling tools for act…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Anup Thakur, Varinder Kumar, Se Jun Kang, Ik-Jae Lee, Sanjeev Gautam, K. H. Chae, Hyun Joon Shin;…
Aerosol oligonucleotide therapy has vast potential in pulmonary system diseases. Reactive oxygen species (ROS) play an important role in complex physiological processes such as cell signaling, apoptosis, etc. Therefore, to determine the mechanism of ROS involvement in polyethylenimine/oligonucleotide (PEI/ON) endocyto…
In this study, cerium-based conversion coating was deposited on aluminum 7075-T6 by dip immersion method. Cerium oxide/hydroxide is an environmentally friendly conversion coating. Its corrosion resistance in 3.5 wt.% NaCl solution was investigated by means of electrochemical impedance spectroscopy, potentiodynamic pol…
Electron emission characteristics of field emitter arrays with hafnium nitride cathode were investigated at the low temperature of 140 K. The characteristics at 140 K showed little difference from those at room temperature immediately after cooling down. After a long term operation, the collector current showed a grad…
New synthesis route of the lanthanum germanate oxyapatite was successfully developed by a citrate combustion method from a homogeneous aqueous solution. The homogeneous solution can be prepared by dissolving lanthanum nitrate, germanium dioxide, dilute ammonia, and dilute nitric acid, and citric acid in water. From X-…
The mechanical properties of the sintered compacts made of the Fe–0.5mass%Cr–0.2mass%Mn–0.2mass%Mo prealloyed powder (JIP® 5CRA) have been investigated. Tensile strength and hardness of the 5CRA material increased with the increases of addition of Cu and graphite, respectively. 5CRA–2.0mass%Cu–1.0mass%Gr material show…
The theoretical framework for dissolution of weak acid and weak base drug compounds in buffered media is well established. Therefore, this article is intended to provide a review of this framework and apply it to formulate buffered dissolution media based on ionic equilibrium conditions within the diffusion layer at t…