Showing papers on "Titanium powder published in 1982"

Titanium and titanium alloys : scientific and technological aspects

Abstract: Decomposition of the Martensite in Two-Phase Titanium Alloys- The Investigation of the Titanium Structure after Shock Wave Loading- Embrittlement and "Spontaneous" Cracking of a Hardened (?+?) Titanium Alloy during Aging- Transformation in Unstable Beta-Titanium Alloys- Internal Friction Studies in Stable and Metastable Beta Titanium Alloys- Aging Characteristics of Beta Titanium Alloys- Decomposition of the Solid Solution the The All-Beta ?III- Martensite Formation and Decomposition in Alloys of Titanium Containing ?-Stabilizing Elements- An Evaluation of Direct Aging to Achieve Optimum Mechanical Properties for the Metastable Beta Ti-8Mo-8V-2Fe-3Al Alloy- Intensification of Chemical-Thermal Treatment of Titanium and Its Alloys- Effect of Boronising on Adhesive Wear Characteristics of Titanium- Antiseizing Properties of Titanium Alloys under Different Chemical and Heat Treatment- Discussion- Critical Review Influence of Technological Factors on Structure and Properties of Titanium Alloys- Structure of Semifinished Alpha + Beta Titanium Alloy Products- Influence of the Parameters of a Laminated Structure on the Mechanical Properties of Titanium Alloys- Methods of Refining Coarse-Grained Structures of Titanium Alloys- The Influence of Polygonized Structure on the Properties of Heat-Treated Beta Titanium Alloys- Transmission Electron Microscopy Study of Structural Changes Hot Deformation of Titanium Alloys- Influence of Forging Skin on Fatigue Strength of die Forgings in Ti-6a1-4v Material- The Influence of Hydrogen on Hot Deformability of Titanium Alloys with Different Phase Compositions- The Effect of Some Technological Factors on the Structure and Properties of the Equiatomic Titanium-Nickel Alloy- Thermomechanical Properties and Stress Corrosion of RMI Ti-3A1-8V-6Cr-4Mo-4Zr- Texture Development in ?+ss Titanium Alloys- The Effect of Phase Transformation on Deformation Texture of ? and (? + ss) Titanium Alloys- The Formation of Recrystallization Texture in Ti-Al Alloys- Recrystallization of Ti-Mo Base Beta Alloys- Annealing Behavior and Strengthening of Ti-6a1-2sn- Influence of Grain Size on the Ductility of Age-Hardened Titanium Alloys- Processing and Deformation Studies on Ultrafine Grained Titanium- Effects of Texture on Deep Drawability of Commercially Pure Titanium Sheet- Influence of Processing and Heat Treatment on the Anisotropic Properties of Sheet and Strip of Commercially Pure Titanium- Mechanical Properties of Titanium Alloy Plates- Effect of Heat Treatment on the Mechanical Properties in an Alpha-Beta Titanium- The Effect of Heat Treatment on the Fatigue Strength of Ti-6A1-4V- Effect of Heat Treatment on the Microstructure and Properties of IMI 685- A Comparative Study of Creep Resistance and Thermal Stability of Alloys "685" and "6242" in Air and in Vacuum- Effects of TiA16V4 Metallurgical Structures on Fatigue Properties- The Effect of Variations in Heat Treatment on the Mechanical Properties of an ?+ss Titanium Alloy IMI 550 (Ti-4A1-2Sn-4Mo-05Si)- Heat Treatment of Cast Ti-6A1-4V Alloy- On Titanium Alloy Residual Stress Following Thermodiffusion Saturation- Discussion- Critical Review Titanium Alloys for Different Branches of Engineering- Critical Review Titanium for Engineering Purposes- Trends in the Development of High-Strength Titanium Alloys- Principles of Titanium Alloys Complex Alloying- A Titanium Alloy with Improved Mechanical Resistance Ti-6A1-6V-2Sn-6Zr- Effect of Impurities on the Working Ability of Ti-6A1-4V Type Alloy- Ti-6A1-4V for Marine Uses- Development of a New Moderate Strength, High Fracture Toughness Titanium Alloy: Ti-45A1-5Mo-L5Cr (Corona 5)- The Metallurgical Synthesis of a New Generation of Deep Hardenable Titanium Alloys The Metastable Beta Ti-Mo-V-Cr-Al System - Cracking of a Hardened (?+?) Titanium Alloy during Aging- Transformation in Unstable Beta-Titanium Alloys- Internal Friction Studies in Stable and Metastable Beta Titanium Alloys- Aging Characteristics of Beta Titanium Alloys- Decomposition of the Solid Solution the The All-Beta ?III- Martensite Formation and Decomposition in Alloys of Titanium Containing ?-Stabilizing Elements- An Evaluation of Direct Aging to Achieve Optimum Mechanical Properties for the Metastable Beta Ti-8Mo-8V-2Fe-3Al Alloy- Intensification of Chemical-Thermal Treatment of Titanium and Its Alloys- Effect of Boronising on Adhesive Wear Characteristics of Titanium- Antiseizing Properties of Titanium Alloys under Different Chemical and Heat Treatment- Discussion- Critical Review Influence of Technological Factors on Structure and Properties of Titanium Alloys- Structure of Semifinished Alpha + Beta Titanium Alloy Products- Influence of the Parameters of a Laminated Structure on the Mechanical Properties of Titanium Alloys- Methods of Refining Coarse-Grained Structures of Titanium Alloys- The Influence of Polygonized Structure on the Properties of Heat-Treated Beta Titanium Alloys- Transmission Electron Microscopy Study of Structural Changes Hot Deformation of Titanium Alloys- Influence of Forging Skin on Fatigue Strength of die Forgings in Ti-6a1-4v Material- The Influence of Hydrogen on Hot Deformability of Titanium Alloys with Different Phase Compositions- The Effect of Some Technological Factors on the Structure and Properties of the Equiatomic Titanium-Nickel Alloy- Thermomechanical Properties and Stress Corrosion of RMI Ti-3A1-8V-6Cr-4Mo-4Zr- Texture Development in ?+ss Titanium Alloys- The Effect of Phase Transformation on Deformation Texture of ? and (? + ss) Titanium Alloys- The Formation of Recrystallization Texture in Ti-Al Alloys- Recrystallization of Ti-Mo Base Beta Alloys- Annealing Behavior and Strengthening of Ti-6a1-2sn- Influence of Grain Size on the Ductility of Age-Hardened Titanium Alloys- Processing and Deformation Studies on Ultrafine Grained Titanium- Effects of Texture on Deep Drawability of Commercially Pure Titanium Sheet- Influence of Processing and Heat Treatment on the Anisotropic Properties of Sheet and Strip of Commercially Pure Titanium- Mechanical Properties of Titanium Alloy Plates- Effect of Heat Treatment on the Mechanical Properties in an Alpha-Beta Titanium- The Effect of Heat Treatment on the Fatigue Strength of Ti-6A1-4V- Effect of Heat Treatment on the Microstructure and Properties of IMI 685- A Comparative Study of Creep Resistance and Thermal Stability of Alloys "685" and "6242" in Air and in Vacuum- Effects of TiA16V4 Metallurgical Structures on Fatigue Properties- The Effect of Variations in Heat Treatment on the Mechanical Properties of an ?+ss Titanium Alloy IMI 550 (Ti-4A1-2Sn-4Mo-05Si)- Heat Treatment of Cast Ti-6A1-4V Alloy- On Titanium Alloy Residual Stress Following Thermodiffusion Saturation- Discussion- Critical Review Titanium Alloys for Different Branches of Engineering- Critical Review Titanium for Engineering Purposes- Trends in the Development of High-Strength Titanium Alloys- Principles of Titanium Alloys Complex Alloying- A Titanium Alloy with Improved Mechanical Resistance Ti-6A1-6V-2Sn-6Zr- Effect of Impurities on the Working Ability of Ti-6A1-4V Type Alloy- Ti-6A1-4V for Marine Uses- Development of a New Moderate Strength, High Fracture Toughness Titanium Alloy: Ti-45A1-5Mo-L5Cr (Corona 5)- The Metallurgical Synthesis of a New Generation of Deep Hardenable Titanium Alloys The Metastable Beta Ti-Mo-V-Cr-Al System - design and Properties- Strength and Toughness of Binary Ti-Ni and Ti-Mo Alloys- The Technological Aspects of Titanium Application in the TU-144 Aircraft Structure- Ways of Increasing Titanium Alloys High Temperature Strength- Investigation of Some Properties of VT5L Alloy with Rare Earth Additions- Characteristics of Commercially Pure Titanium for Power Plant- The Effect of Carbon on the Behavior of the Beta-Titanium Alloys- An Investigation of Some Palladium-Titanium Alloys- A Titanium Alloy for Application in Hot Sodium Chloride Solutions- On the Performance of Whole-Titanium Made Turbine Condenser- Manufacture and Properties of Titanium Tubes for Power Station Condensers- Trends in the Use of Titanium in Heat Exchange- Titanium Basket Anodes for Metal Refining and Winning- Recent Advances in Titanium Cathodes- Discussion- Critical Review Powder Metallurgy of Titanium- A Novelty in the Field of Titanium Powder Metallurgy- Production of Die-Forged Discs from BT9 Alloy Powder- Production of Titanium Parts, Apparatus and Machinery by Methods of Powder Metallurgy- Rolling of Titanium Powder and Its Alloys- The Mechanical Properties of P/M Ti-6A1-4V Alloy- Dispersion Hardening of Titanium- Production of High Purity Titanium Powder by Electron Beam Technology- Comparative Evaluation of Forged Ti-6A1-4V Bar Made from Shot Produced by Rep and CSC Processes- Critical Review Titanium Matrix Composites- Investigation of Structure of Titanium Matrix Fiber Composites- Model Composite (Layered) Material on the Basis of Titanium- The Investigation of Solid-Phase Interaction of Titanium with Refractory Compounds- The Influence of Release Agents on Properties of the Titanium Foil Produced by Vacuum Evaporation- The Application of TiC and TiN Thick Films by PVD Processes- Discussion

Production of metal powder

Abstract: Fine mesh metal powder, such at titanium powder, is prepared by reaction of a halide of the metal, in vapor form, with a fine spray of molten sodium at a temperature below the melting point of the metal.

Electrode material for semiconductor device

Abstract: PURPOSE:To obtain a material enabled to form an electrode having low contact resistance without generating junction breakdown by a method wherein the material is constructed of silver powder, one kind or more of titanium and magnesium, one kind or more of silver phosphate, nickel phosphate and magnesium phosphate, an organic binder, and glass powder to be added in occasion demands. CONSTITUTION:Silver powder of 10g of 1mum or less of grain size, titanium powder (0.5-40pts.wt. to 100pts.wt. of silver powder) of 10mum or less of grain size performed with surface stabilization treatment, silver phosphate (5-40pts.wt. to 100pts.wt. of silver powder), and borosilicate lead glass frit of 1g are weighted. A viscous liquid obtained by dissolving 10pts.wt. of ethylcellulose of 10cps to 90pts.wt. of alpha-terpineol is added thereto to be kneaded, and a paste type electrode material of about 200 poise of viscosity is prepared. Screen process printing of the above-mentioned paste type electrode material is performed in a tandem type pattern shape on the N type layer 2 of a P type silicon substrate 1 and in a solid pattern type on the P type layer 3, they are dried at 150 deg.C, and after light receiving side electrodes 4 and back electrodes 5 are formed, calcination is performed at 600 deg.C in a nitrogen gas atmosphere containing 50ppm of oxygen to manufacture a solar cell, for example.

Investigation of the laws of ignition of titanium powders

Abstract: The study of the ignition characteristics of powders of the refractory transition metals is of scientific and practical importance. It is of interest to investigate the effect on the ignition process of such parameters as the composition of the gaseous oxidizer, the heat transfer conditions, the specimen dimensions, and the grade of metal powder. The article is devoted to the question of the ignition of transition metal powders, with titanium serving as an example. On the basis of the experimental data, several conclusions may be drawn. First, it was found that nitrogen has a chemical effect on the ignition of titanium powder in air only in the presence of an oxygen deficit. Second, a gas flow has a significant effect on the critical ignition temperature, reducing it at low and increasing it at high gas flow rates. It was further found that the titanium powder ignition process can develop in the autoignition and external ignition regimes. Generally good agreement was found between the theoretical and experimental values of the critical ignition temperature for titanium powder.

A Novelty in the Field of Titanium Powder Metallurgy

Abstract: When producing articles of titanium and titanium alloys by conventional technology, 70 to 80% of the input metal is lost as scrap between the ingot and the final product. The yield of usable product does not ordinarily exceed 20 to 25%.(1–2) Powder metal-lugy allows a four to five-fold increase in metal utilization and a one and one-half to two-fold decrease in labor consumption when machining articles, thus resulting in a savings of six to ten thousand roubles per ton of final product.(3)

Manufacture of hot cathode

Abstract: PURPOSE:To achieve both prevention of the oxidation of a cathodic chip and prevention of the reaction between the cathodic chip and a high-melting-point supporting metal by joining the cathodic chip and the supporting metal by means of a paste containing both colloidal carbon and a reaction-barrier member, and sintering the paste applied between the cathodic chip and the supporting metal in an inactive atmosphere. CONSTITUTION:A hot cathode in this invention, as shown in the figure, cinsists of a tungsten wire 3 and a cathodic hexaboride chip 4 held at the center of the wire 3, and as the result, has a notably improved luminance and a widely extended life. A tantalum cup 5, which supports the cathodic chip 4 made of polycrystal lanthanum hexaboride, is prepared by shaping a tantalum plate having 0.1mm. thickness and used as a supporting metal into form with ?-shaped section. A paste 6 is prepared by mixing colloidal carbon and titanium powder in a ratio by volume of 1 to 5 before the mixture is mixed into water, and is applied between the chip 4 and the cup 5 so as to make them to stick together. Then, thus applied paste 6 makes a reaction-barrier layer after being heated for about 15 minutes, and becomes in mechanical and thermal contact with both the chip 4 and the cup 5.

The Mechanical Properties of P/M Ti-6A1-4V Alloy

Abstract: Extensive efforts to fabricate titanium alloy components by powder metallurgical technique have been made in recent years.1–10 In almost all cases, however, completely alloyed powders produced by various processes, such as the hydride-dehydride process, mechanical attrition process or rotating electrode process, were used as the starting materials.

Method of producing porous material for electrolytic condenser

Abstract: A porous sintered body for an Al-Ti alloy solid electrolytic capacitor comprises a porous body of Al-Ti alloy and a titanium lead wire partly embedded in the porous body The titanium lead wire is subjected during manufacture to a nitriding treatment and is sintered together with the Al-Ti body so that the surface of the lead wire is converted into an Al-Ti alloy In one method of producing the porous sintered body, a titanium wire is heat-treated in a nitrogen atmosphere, the wire is then embedded in a mixture of aluminium powder and titanium powder or titanium hydride powder, the mixture is press-moulded with the wire and the press-moulded article is sintered A solid electrolytic capacitor and a method for manufacturing such a capacitor employing the porous sintered body are disclosedThe invention provides a porous sintered body with an embedded lead wire in which the lead wire is inexpensive and has good electrical characteristics and which avoids the problem of bending deformation of the wire after sintering

Production of Titanium Parts, Apparatus and Machinery by Methods of Powder Metallurgy

Abstract: Making components of titanium powder is a powerful approach to the higher techno-economic effectiveness manifested as a drastic decrease in material consumption, lower prime cost and higher productivity as compared with their making by machining the wrought blanks.

The Investigation of Solid-Phase Interaction of Titanium with Refractory Compounds

Abstract: The study of the regularities of a solid-phase interaction in the system of titanium-refractory compound is of a theoretical and practical interest, since its results can be used in various fields of metallurgy and engineering, particularly in powder metallurgy when creating titanium powder-based composite materials. The character of such an interaction governs the choice of sintering and heat treatment conditions and to a considerable extent determines the mechanism of strengthening and finally the properties of sintered titanium articles.

Rolling of Titanium Powder and Its Alloys

Abstract: One of the methods of titanium metal production is the manufacture of powders with a wide particle size range from 20 microns to 1.5–2.0mm (hydride, calcium, hydride and electrolytic methods). A great number of studies have been carried out in this direction in the USSR, and as a result, powders of 0.02–2.0mm particle size have been obtained: calcium hydride and electrolytic processes developed by the Central Research Institute of Ferrous Metallurgy (CRIFM) named after I. P. Bardin(1,2,3) and an electrolytic method developed by the Institute of Titanium (Zaporozhye). The degree of purity in fine and coarse powders varied as a result of the high chemical reactivity of titanium. Fine powders were more contaminated especially with oxygen, while the coarse ones approached the chemical composition of iodide titanium. Titanium powder metallurgy has been further developed with the production of titanium metallic powders in the USSR.

Critical Review Powder Metallurgy of Titanium

Abstract: Powder metallurgy offers an attractive alternate strategy for producing titanium parts. The advantages include an efficient material utilization, near-net shape products with better mechanical properties. It is not without significance that the initial pioneering experiments by the U.S. Bureau of Mines were first in producing titanium powder compacts. Interstitial pick-up encountered during reduction prevented the exploitation of the powder route. Early experiments on the production of titanium powder during the metal reduction stage itself were carried out in the Soviet Union using the calcium hydride process. These efforts were only marginally successful because of impurity pick-up during reduction. More than anything else, non-availability of a good quality powder is responsible for titanium powder metallurgy remaining dormant for a number of years.