Download or read book Influence of Rare Earth Additions on Properties of Titanium Alloys Effects of Yttrium and Erbium Additions on Ti 8Al and Ti 10Al Alloy written by S. M. L. Sastry and published by . This book was released on 1980 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of additions of 0.05-1.0 wt% Y and 0.2-2.0 wt% Er on the microstructure, slip distribution, fracture modes, and room- and elevated-temperature mechanical properties of Ti-8Al and Ti-10Al alloys was studied. Additions of up to 0.1 wt% Y and 0.2 wt% Er result in 50-200 nm incoherent dispersoids which effect grain refinement, reduce the planarity of slip, and significantly increase the ductility of Ti-8Al alloys. The additions further improve the room-temperature fracture toughness and room- and elevated-temperature low-cycle fatigue life of Ti-8Al and do not significantly alter the creep of Ti-8Al and Ti-10Al alloys. Higher amounts of Y and Er additions produce large, 1-5 micron dispersoids and produce no significant grain refinement or improvements in strength and ductility of the alloys.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1982 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Rare earth Additions on Properties of Titanium Alloys written by T. C. Peng and published by . This book was released on 1982 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effects of 0.01-2.0 wt% yttrium and erbium additions on rapid solidification processing, superplastic forming, welding, and strengthening of titanium alloys were determined. Ti-8Al-Y and Ti-8Al-Er alloys were rapidly solidified by laser surface melting and electron beam melting and splat-quenching with the objective of simultaneously producing coherent Ti3Al precipitates and incoherent dispersoids. Rapid solidification at cooling rates> 10,000 K/s resulted in 10-100 nm incoherent dispersoids in Ti-8Al-1.5Y and in a nonequilibrium, supersaturated, solid solution Ti-8Al-1.5Si. Dispersoid formation and stability at 700-900 C were studied, and the annealing conditions for the production of a large volume-fraction of fine incoherent dispersoids and of coherent Ti3Al precipitates were determined. Metallic yttrium additions to Ti-6Al-2Nb-1Mo-0.8Ta improved the superplastic formability and increased the strength and ductility of laser weldments. The superposition of solid-solution strengthening, precipitation strengthening, and grain-size strengthening in ingot processed Ti-xAl (x = 4, 5.5, 7.0, 8.5, and 10.0) alloys was studied.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1980-03 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Rare Earth Additions on Properties of Titanium Alloys Microstructures and Room Temperature Tensile Properties of Ti 6A1 4V with Yttrium Erbium and Mischmetal Additions written by Charles R. Whitsett and published by . This book was released on 1977 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of different concentrations of metallic yttrium, erbium, and mischmetal (MM) on the microstructure and room-temperature mechanical properties of Ti-6Al-4V was studied. Alloy ingots containing 0.02-0.3 wt% Y, 0.1-2.0 wt% Er, and 0.01-0.2 wt% MM were cast, forged, hot-rolled, and mill-annealed in the alpha-beta and beta fields. The metallic rare-earth additions produce a uniform dispersion of small (
Download or read book Influence of Rare earth Additions on Properties of Titanium Alloys written by C. R. Whitsett and published by . This book was released on 1977 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Rare Earth Additions on Properties of Titanium Alloys Room Temperature Tensile Properties and Fracture Toughness of Ti 6Al 4V with Erbium Yttrium and Yttria Additions written by C. R. Whitsett and published by . This book was released on 1978 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of additions of 0.1 wt% Er, 0.02 wt% Y, 0.05 wt% Y, and 0.038 wt% Y2O3 on the room-temperature tensile properties and fracture toughness of Ti-6Al-4V was studied. The alloys were cast by consumable-electrode arc-melting in vacuum. Er and Y were added in the form of Ti-25Er and Ti-25Y master alloys, and Y2O3 was added in the form of a fine powder. The alloys, after being forged and rolled, had only about half the nominal concentrations of rare-earth additives. The rolled plates were given various heat treatments to observe the combined effects of microstructure and rare-earth additives. The rare-earths effect grain refinement. The room-temperature tensile properties and fracture toughness of Ti-6Al-4V are not significantly altered by the rare-earths. The crystallographic texture developed during rolling also is unaffected by the rare-earth additives, although Y and Y2O3 effect an increased sharpness of near-transverse-basal texture components in alpha-beta annealed alloy. The uniform elongation of Ti-6Al-4V under tensile stress at high temperatures is increased by Er and Y additions. The high-temperature compressive stress-strain characteristics of heat treated Ti-6Al-4V are not altered by Er and Y. (Author).
Download or read book Metals Abstracts written by and published by . This book was released on 1982 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1982 with total page 1010 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1982-07 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Rare Earth Additions on Properties of Titanium Alloys Plane Strain Fracture Toughness Creep and High Temperature Deformation of Ti 6Al 4V with Erbium and Yttrium Additions written by Shankar M. L. Sastry and published by . This book was released on 1979 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of additions of 0.05 wt% Y and 0.1 wt% Er on the room-temperature tensile properties, plane-strain and plane-stress fracture toughness, creep, and high-temperature high-strain-rate deformation characteristics of Ti-6Al-4V was studied. 75kg ingots of Ti-6Al-4V, Ti-6Al-4V-0.05Y and Ti-6Al-4V-0.1Er were cast, forged, and rolled into 80-mm, 30-mm, and 13-mm plates. The Y and Er additions reduce the high-temperature flow stress of Ti-6Al-4V at strain rates of 0.05 and 0.5/s and significantly improve ingot-breakdown forging by suppressing the edge cracking. The Y-containing Ti-6Al-4V has lower flow stress and higher strain-rate sensitivity of flow stress and consequently better superplasticity than the reference alloy at 906 C at strain rates of .00001 to .001/s. The room-temperature plane-strain fracture toughness, yield stress, ductility, and high-temperature creep are not significantly altered by the rare-earth additions. (Author).
Download or read book The Effect of Minor Alloying Element Additions on Mechanical Properties of Titanium Alloys written by and published by . This book was released on 1977 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Technical Report describes a research program conducted jointly by the Science Center, Rockwell International, and TIMET, to study the effects of minor element additions on the mechanical properties of titanium alloys. The effect of additions of Si, Bi, Fe, S and 0 on mechanical properties of a base alloy of composition Ti-6Al-2Sn-2Zr-1Mo have been studied. In this Technical Report final results on tensile, creep, creep stability, alloy partitioning, fatigue, fracture, hot salt stress corrosion, and microstructural characterization of these alloys is presented.
Download or read book Effect of Boron Additions on Microstructure Mechanical Properties of Titanium Alloys Produced by the Armstrong Process written by Jonathan P. Blank and published by . This book was released on 2008 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The beneficial influence of boron additions on processing, microstructure, physical and mechanical properties of various titanium alloys has been recognized since 1950's. However, boron additions to titanium alloys to obtain specific microstructures and mechanical properties for several niche applications, including automotive and aerospace, have been actively studied during the past 25 years. The addition of boron concentrations greater than 0.05 wt.% to titanium alloys creates a dispersion of TiB. The presence of TiB enhances the tensile and fatigue strengths as well as the wear resistance as compared to the original titanium alloy. Although these improvements in mechanical properties are attractive, there are still two major obstacles in using these alloys: (1) relationship of microstructure and mechanical properties in Ti-B alloys needs further investigation to optimize the alloys for specific commercial applications; and (2) cost to benefit ratio of producing these alloys is high for a given application(s). The Armstrong process is a novel process that can produce commercially pure (CP) titanium and titanium alloy powder directly from TiCl4 (and other metal halides or as required, to obtain the desired alloy composition). The Armstrong process uses sodium as a reducing agent, with similar reactions as the Hunter process using sodium as a reducing agent and Kroll process using magnesium as a reducing agent. The Armstrong process forms CP-Ti and titanium alloyed powder, which can be directly consolidated or melted into the final product. In comparing the downstream processing steps required by the Kroll and Hunter processes with direct consolidation of Armstrong powder, several processing features or steps are eliminated: (1) restriction of batch processing of material, (2) blending of titanium sponge and master alloy material to create titanium alloys, (3) crushing of the sponge product, (4) melting, and (5) several handling steps. The main objective of this research was to characterize structure and properties of CP-Ti and Ti-B alloys produced by the Armstrong process. Particular emphasis has been placed on improved understanding of the strengthening mechanisms associated with the addition of boron to titanium alloys.
Download or read book The Effects of Small Varying Additions of the Common Contaminants of Titanium on the Mechanical Properties of the Ti 5Al 2 5Sn Alloy The Development of Strong Tough Titanium Alloys for Ordnance Use written by REM-CRU TITANIUM INC MIDLAND PA. and published by . This book was released on 1954 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interactions of Titanium and Molybdenum Additions with Interstitial Impurities in Vanadium written by George H. Keith and published by . This book was released on 1969 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of rare earth elements on the microstructures and properties of powder metallurgical titanium alloys written by Yong Liu and published by . This book was released on 2012 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Small Ternary and Quaternary Additions of the Common Contaminants of Titanium on the Ti 7Mn Alloy and the Heat Treatment Responses Thereof The Development of Strong Tough Titanium Alloys for Ordnance Use written by REM-CRU TITANIUM INC MIDLAND PA. and published by . This book was released on 1953 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
