The Determination of Efficient Super Finishing Conditions for the Mirror Surface Finishing of Titanium

2011 ◽  
Vol 110-116 ◽  
pp. 3541-3550
Author(s):  
J. S. Kim ◽  
J. D. Hwang ◽  
Y.G. Jung ◽  
O. C. Shin
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Rotation Speed ◽  
Pure Titanium ◽  
Surface Finishing ◽  
Mirror Surface ◽  
Specific Strength ◽  
Machined Parts ◽  
Series Of Experiments

Recently, the demands for superfinishing machines have increased, but the development of superfinishing devices and superfinishing technology remain insufficient. And titanium, with its infinite potential, is widely known as a highly ideal material. It is therefore used in various industries that require precision-machined parts, such as the automobile, chemistry and aerospace industries, due to its outstanding specific strength and corrosion resistance compared to any other alloys. In this study, a series of experiments was performed to determine the mirror surface finishing conditions of titanium as well as efficient superfinishing conditions that can be utilized practically and economically at production sites. The applied conditions were the workpiece rotation speed, the oscillation speed, the contact pressure, the roller hardness and the type of abrasive film used when superfinishing was performed using an abrasive film for titanium-based materials such as pure titanium and titanium alloy. From the experiments, it was confirmed that efficient superfinishing conditions and mirror surface finishing conditions were determined for pure titanium and titanium alloy.

Research Status and Development of Titanium Alloy Drill Pipes

2019 ◽  
Vol 944 ◽  
pp. 903-909 ◽  
Author(s):  
Rui Zhe Li ◽  
Chun Feng ◽  
Long Jiang ◽  
Ya Qiong Cao
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
High Temperature ◽  
Drill Pipe ◽  
Petroleum Industry ◽  
Specific Strength ◽  
Deep Wells ◽  
Production Safety ◽  
Drill Pipes ◽  
Pipe Processing

Petroleum and natural gas exploration and development are deepening, and the environment and stratum conditions encountered are becoming more and more complex. There are many high-temperature, high-pressure, high-corrosion wells, and the number of ultra-short horizontal directional wells, ultra-deep wells, and extended reach wells are also increasing. The steel drill pipe has not been able to meet and adapt to these requirements. Titanium alloy drill pipe has a series of advantages such as low density, high specific strength, excellent corrosion resistance, high temperature resistance, fatigue resistance, non-magnetic and good flexibility. It is suitable for the development of modern petroleum industry. This article discusses the use of titanium alloy drill pipe in domestic and foreign drilling in horizontal wells with short radius, the design of alloy components in titanium alloy drill pipes, body pipe processing, joint connection and corrosion resistance. Combining the practical application of titanium alloy drill pipe points out the current problems. Finally, from the aspect of drilling cycle, production safety and cost saving, the development and application of titanium alloy drill pipes in deep wells, ultra-deep wells and deep-sea drilling operations are prospected.

Titanium Alloy Ti6Al4V’s Corrosion Resistance Behavior by Double Glow Discharge Plasma Hydrogen-Free Carburizing Process

2008 ◽  
Vol 47-50 ◽  
pp. 1197-1200
Author(s):  
Gao Hui Zhang ◽  
Ping Ze Zhang ◽  
Ming Zhou Yu ◽  
Zhong Xu
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Glow Discharge ◽  
High Purity ◽  
Discharge Plasma ◽  
Pure Titanium ◽  
Surface Hardness ◽  
Electrochemical Corrosion ◽  
Glow Discharge Plasma ◽  
Corrosion Properties

The surface-modified Titanium alloy Ti6Al4V was obtained in the process of the double glow discharge plasma hydrogen-free carburizing. The high purity solid graphite as the source cathode supplied the carbon elements; pure titanium and its alloys were used as the cathode and argon as the working gas. At certain pressure and voltage, the glow discharge appeared between cathode and anode, source cathode and anode. The carbon plasma flux, including carbon atoms, ions, sputtered by argon ions diffused into the substrate, which depended on ions bombardment and thermal diffusion at a negative voltage. High purity solid graphite cathode was done in a honeycomb shape or grid shape. A layer with TiC and C phases was formed during the process. Surface hardness was increased by four times due to the presence of TiC and C phases, and wear resistance was enormously improved. The C concentration and hardness of alloying layer changed gradually with the depth. The corrosion properties of hydrogen-free carburized specimens were tested in the solution of 5% NaCl and 5% H2SO4, using electrochemical corrosion method. The results showed that the corrosion resistance of carburized specimens was significantly improved in 5% H2SO4 solution.

COMMERCIALLY PURE TITANIUM GRADE 12

Alloy Digest ◽  
1989 ◽  
Vol 38 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Formic Acid ◽  
Chemical Industry ◽  
Pure Titanium ◽  
Heat Treating ◽  
Commercially Pure Titanium ◽  
Bend Strength ◽  
Commercially Pure ◽  
Titanium Grade

Abstract Commercially pure wrought titanium, Grade 12 is used in the chemical industry where conditions are mildly reducing or varying between oxidizing and reducing. It is immune to formic acid, aerated or non-aerated. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-93. Producer or source: Titanium alloy mills. Originally published August 1989, revised September 1989.

Determination of efficient superfinishing conditions for mirror surface finishing of titanium

2012 ◽  
Vol 19 (1) ◽  
pp. 155-162 ◽  
Author(s):  
Jin-seob Kim ◽  
Eun-seong Lim ◽  
Yoon-gyo Jung
Keyword(s):  
Surface Finishing ◽  
Mirror Surface

scholarly journals Effects of O2 Fine Bubbles on ELID Grinding Using Conductive Rubber Bond Grinding Wheel

2019 ◽  
Vol 13 (5) ◽  
pp. 657-664
Author(s):  
Katsufumi Inazawa ◽  
Hitoshi Ohmori ◽  
Nobuhide Itoh ◽  
◽  
Keyword(s):  
High Performance ◽  
Pure Titanium ◽  
Surface Finishing ◽  
Grinding Wheel ◽  
Mirror Surface ◽  
Workpiece Material ◽  
Elid Grinding ◽  
Conductive Rubber ◽  
Grinding Fluid ◽  
Grinding System

This study proposes a new grinding system using grinding fluid containing oxygenic fine bubbles (O2FBs) to realize high-performance electrolytic in-process dressing (ELID) using a conductive rubber bond grinding wheel. It was found that grinding fluid containing O2FBs dramatically increases the dissolved oxygen in the grinding fluid. In addition, the O2FBs in the fluid are drawn to the conductive rubber bond grinding wheel, which is the positive pole, during ELID. These effects are thought to enhance the dressing performance of the conductive rubber bond grinding wheel. Grinding of pure titanium using the proposed grinding system was found to realize mirror surface finishing while increasing the amount of removed workpiece material, compared to when ELID was not applied and to when ELID grinding was conducted using a normal grinding fluid. Effects of ELID grinding on surface modification were also observed, confirming that the proposed grinding system is able to form a thick oxidized film on pure titanium.

COMMERCIALLY PURE TITANIUM GRADE 4

Alloy Digest ◽  
1989 ◽  
Vol 38 (5) ◽  
Keyword(s):  
Tensile Strength ◽  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Physical Properties ◽  
Pure Titanium ◽  
Heat Treating ◽  
Commercially Pure Titanium ◽  
Bend Strength ◽  
Commercially Pure ◽  
Titanium Grade

Abstract Titanium Development Association commercially pure wrought titanium, Grade 4 is used in equipment where resistance to corrosion in chemical, marine and other industries is required. At a guaranteed 80,000 psi minimum mill annealed tensile strength, titanium Grade 4 is the strongest of the commercially pure grades. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and bend strength as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-92. Producer or source: Titanium alloy mills.

Research Progress on Corrosion Resistance of Titanium Alloy Oil Well Tubing

2021 ◽  
Vol 1035 ◽  
pp. 528-533
Author(s):  
Fang Fang Zhang ◽  
Chun Feng ◽  
Li Juan Zhu ◽  
Wen Wen Song
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Aluminum Alloy ◽  
Alloy Steel ◽  
Research Progress ◽  
Oil Well ◽  
Corrosive Media ◽  
Specific Strength ◽  
Gas Drilling ◽  
Deep Wells

Compared with aluminum alloy and alloy steel, titanium alloy has higher specific strength, lower modulus of elasticity, and better toughness, fatigue performance and corrosion resistance. In terms of oil well tubing, the development of titanium alloy lags behind that of aluminum alloy and alloy steel. Aluminum alloy tubing is sensitive to pitting, fatigue corrosion and stress corrosion cracking. At the same time, it is not suitable for ultra-deep wells due to temperature limitations. Easily interact with corrosive media to cause corrosion and cracking. Titanium alloy oil well tubing is expected to solve this corrosion problem, but its corrosion resistance research is still incomplete. Therefore, it is necessary to develop titanium alloy oil well tubing with good corrosion resistance to improve corrosion fatigue (CF), fatigue during deep oil well and natural gas drilling operations. Catastrophic brittle fracture caused by hydrogen induced cracking (HIC), pitting corrosion and sulfide stress cracking (SSC). In this paper, by investigating a large number of domestic and foreign documents, the corrosion types of titanium alloy oil well pipes are analyzed, and the research status of corrosion resistance of titanium alloy oil well pipes is reviewed from three aspects: oil pipes, casings and drill pipes.

The Detailed Performance of MCF Polishing Liquid in Nano-Precision Surface Treatment of Acrylic Resin

2009 ◽  
Vol 76-78 ◽  
pp. 331-336 ◽  
Author(s):  
Yong Bo Wu ◽  
Takashi Sato ◽  
Wei Min Lin ◽  
K. Yamamoto ◽  
Kunio Shimada
Keyword(s):  
Surface Treatment ◽  
Process Parameters ◽  
Abrasive Particle ◽  
Cellulose Fiber ◽  
Acrylic Resin ◽  
Surface Finishing ◽  
Mirror Surface ◽  
Series Of Experiments ◽  
Set Up ◽  
Machining Characteristics

This paper deals with the experimental investigation on the detailed performance of MCF (magnetic compound fluid) polishing liquid (MPL) in nano-precision surface treatment of acrylic resin that is essentially required for producing the model in the process of developing an inaugural mechanical system. The MPL is produced in practice by mixing iron powder, abrasive particle and -cellulose fiber into a MF (magnetic fluid), and hence a kind of functional fluid reacting to magnetic fields. Following the previous works confirming the performance of MPL in the surface finishing of acrylic resin, in this work a series of experiments were conducted to reveal how the process parameters affect the machining characteristics in details in order to establish the new technique. The results showed that a mirror surface can be easily obtained once the process parameters have been set up optimally.

The Effect of Stress and Warfarin on the Adrenal Gland in Relation to Spontaneous Hemorrhage, as Judged by Measurement of Adrenal Ascorbic Acid and Serum Corticosterone

1971 ◽  
Vol 26 (02) ◽  
pp. 275-288 ◽  
Author(s):  
S Chattopadhyay ◽  
D. D Johnson ◽  
G. J Millar ◽  
L. B Jaques
Keyword(s):  
Ascorbic Acid ◽  
Acid Concentration ◽  
Ascorbic Acid Concentration ◽  
Corticosterone Concentration ◽  
Serum Corticosterone ◽  
Spontaneous Hemorrhage ◽  
Combined Action ◽  
Series Of Experiments ◽  
Pituitary Adrenal Axis

SummaryRats were subjected to the following procedures: No treatment, Stressor (10% NaCl i.p.), Warfarin for 7 days, Stressor followed by Warfarin; and groups were sacrificed at intervals for assessment of spontaneous hemorrhage and of adrenal ascorbic acid concentration. There was no hemorrhage in the no treatment and stressor groups; some hemorrhage in the warfarin group; profound hemorrhage with Warfarin + Stressor. The adrenal ascorbic acid concentration was found to be lower, 8 h and again 5 days after stress, and remained lower in the warfarin + stress animals. Warfarin had no effect on adrenal ascorbic acid level.In another series of experiments in which the stress consisted of an electric current to the cage floor for 6 sec over 15 min, rats were sacrificed daily for determination of serum corticosterone concentration and occurrence of spontaneous hemorrhage. There was a statistically significant increase of serum corticosterone concentration with stress, warfarin and combined warfarin and stress treatments (P< 0.001 for all three variables). There was a significant correlation (r = 0.96 and 0.89, P< 0.01) for serum corticosterone concentration with hemorrhage score and incidence of hemorrhage in stressed rats receiving warfarin, but not in those receiving only warfarin. The results indicate an activation, rather than an exhaustion, of the pituitary-adrenal axis during the combined action of anticoagulant and stress, which results in the development of spontaneous hemorrhage.

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