Material characterization of superplastically formed titanium (Ti-6Al-2Sn-4Zr-2Mo) sheet

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National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] , [Washington, D.C.], [Springfield, Va
Titanium al
StatementWilliam A. Ossa, Dick M. Royster.
SeriesNASA technical paper -- 2674.
ContributionsRoyster, Dick M., United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL14663417M

Material characterization of superplastically formed titanium (Ti-6Al-2Sn-4Zr-2Mo) sheet Item Preview. An illustration of an open book. Books. An illustration of two cells of a film strip. Video. An illustration of an audio speaker.

Audio. An illustration of a " floppy disk. Full text of "Material characterization of superplastically formed titanium (Ti-6Al-2Sn-4Zr-2Mo) sheet". A collaborative University and Industry research project was undertaken to evaluate the performance of as friction stir welded (FSW) and friction stir welded and superplastically formed (FSW-SPF) titanium 6Al-4V alloy sheets.

The purpose of this initial phase of research is to test and evaluate the mechanical properties of FSW and post SPF-FSW mm thick sheets of by: A method of superplastic forming of titanium packs and an associated assembly is provided.

The titanium packs can include sheets having different granular structures so that the different sheets are adapted to superplastically form at different temperatures.

One or more of the sheets can be formed at a temperature that is below the superplastic forming temperature of another sheet in the by: Some of the strenghts of this book are: the broad range of materials studied, the reduction of scientific results to a form suitable for the practitioner, a profound physical analysis of the.

A prior knowledge about non-uniform thinning in the product after forming helps the designer in the selection of initial blank thickness.

This paper presents a simple analytical procedure for obtaining the thinning variation of a superplastically formed Ti alloy spherical dome.

The procedure is validated with the existing measured data. The purpose of this study was to develop a specialized friction stir welding process for superplastic grade aluminum alloy SP and titanium alloy 6Al-4V, in thickness of mm, such that the butt welded nugget would have equal superplastic forming (SPF) characteristics as the parent sheet material.

The concept of using tailored blanks for the SPF process is proposed which will allow the. Pure titanium nanoparticles were synthesized by utilizing an Electromagnetic Levitation Melting Gas Condensation (ELM-GC) method. Pure bulk titanium samples were melted and evaporated by electromagnetic levitation technique in an inert gas atmosphere in a silica tube.

Titanium nanoparticles were formed from ascendi. 25 Boyer, R.: Titanium and titanium alloys in ASM Handbook: Metallography and Microstructures ASM International Materials Park, OH 26 American Society for Metals Atlas of microstructures of industrial alloys, in Metals Handbook edited by T.

Lyman, E. Boyer, J. Carnes, and P. Unterweiser American Society for Metals Materials Park, OH In materials science, superplasticity is a state in which solid crystalline material is deformed well beyond its usual breaking point, usually over about % during tensile deformation.

Such a state is usually achieved at high homologous es of superplastic materials are some fine-grained metals and ceramics. Other non-crystalline materials (amorphous) such as silica glass. A three-step metallographic preparation procedure was developed for titanium and its alloys.

Attack polishing is utilized in the third step for optimal results, particularly for imaging alpha-Ti with polarized light. Two-phase a-b alloy specimens and all b alloys are easier to prepare than single-phase a specimens. Kroll's reagent appears to be adequate for most alloys.

A modification of Weck. High strength titanium alloys find a significant number of applications throughout the aircraft industry for gas turbine engine and airframe components. Ti-6AV is an alloy that has been around since the ’s and has been used extensively for fan blades, disks, and superplastically formed and diffusion bonded structures.

This alloy has been studied and tested in virtually every. A.K. Mukherjee, R.S.

Description Material characterization of superplastically formed titanium (Ti-6Al-2Sn-4Zr-2Mo) sheet FB2

Mishra, in Encyclopedia of Materials: Science and Technology, 6 Future Directions. Superplasticity is now an accepted forming method for producing the vanes of gas turbine engines using nickel-based superalloys. The process has also found wide acceptance in the forming of airframes for military applications during the last two decades.

An analysis of superplastic forming to manufacture aluminum and titanium alloy components Some alloys with fine-grain size can present, under certain conditions, a very high ductility and large deformations before rupturing occurs; a condition known as superplasticity. Material characterization of superplastically formed titanium (Ti-6Al-2Sn-4Zr-2Mo) sheet / (Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch ; Springfield, Va.

To measure the effect of three special liquid proportions and five forming temperatures on the length of superplastically formed titanium dental implant superstructures made using Rematitan dental.

Titanium and some of its alloys are used as biomaterials for dental and orthopaedic applications. The most common grades used are commercially pure titanium and the Ti6Al4V alloy, derived from aerospace applications.

Physiological Behaviour. These materials are classified as biologically inert biomaterials or bioinert.

Details Material characterization of superplastically formed titanium (Ti-6Al-2Sn-4Zr-2Mo) sheet PDF

Nonetheless, it was the osseointegration phenomenon due to the presence of a naturally formed oxide layer on the titanium surface that sparked development of titanium for use in orthopaedics. Titanium alloys are often used in non-weight-bearing surface components such as femoral necks and stems (Figure 1), as they have lower modulus of.

American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA CiteScore: ℹ CiteScore: CiteScore measures the average citations received per peer-reviewed document published in this title. CiteScore values are based on citation counts in a range of four years (e.g.

) to peer-reviewed documents (articles, reviews, conference papers, data papers and book chapters) published in the same four calendar years, divided by the number of.

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[2] D. Sanders, et al, Characterization of Superplastically Formed Friction Stir Weld in Titanium 6Al-4V: Preliminary Results, Journal of Materials Engineering and Performance,D)I: /s, ASM International, ().

Superplastically formed (SPF) aluminium alloys have the ability to be stretched to several times their original size without failure when heated between °C. It is this superplasticity which allows components to be formed to a required shape by applying air pressure and/or tool movement within custom designed forming machines.

The preparation and characterization of the α-Keggin-type, novel tri-Ti IV-1,2,3-substituted polyoxotungstates with heteroatoms P and Si are molecular structure of K 10 H 2 [α,α-P 2 W 18 Ti 6 O 77]17H 2 O 1, obtained as a main product (% yield) from the 1 ∶ 3 molar ratio reaction of tri-lacunary precursor Na 9 [A-PW 9 O 34]19H 2 O with Ti(SO 4) 2 4H 2 O in aqueous.

A process window was identified for combinations of the feed rate and spindle speed capable of achieving defect free joints for a given tooling configuration and thickness.

It was found that the tensile and fatigue properties of the welds produced in this study were comparable to Ti–6Al–4V base material. Commercialization of Ti sheet is on-going at multiple customer sites. Pilot-scale work on Ti FGS shows that it is capable of being superplastically formed at temperatures as low as °F (°C).

Production sheets of Ti have been manufactured, and. Titanium processing - Titanium processing - The metal and its alloys: The atoms of pure titanium align in the solid state in either a hexagonal close-packed crystalline structure, called the alpha (α) phase, or a body-centred cubic structure, called the beta (β) phase.

In the pure metal, transformation from the alpha to the beta phase occurs upon heating above °C, but most alloying. Commercial grade titanium is usually aro psi.

The softest grade of commercially pure titanium is around MPa, while high-strength alloys can go as high as 1, MPa. Grade 4 commercially pure could be up to MPa. Weight – Titanium is about 45% lighter than steel. While it is 60% heavier than aluminum, it is twice as strong.

Edwards PD, Sanders D G and Ramulu M Simulation of tensile behavior in friction stir welded and superplastically formed titanium Ti–6Al–4V alloy J. Mater. Eng. Perform 19. Titanium silicide (TiSi 2) is widely used as a local interconnect material in complementary metal-oxide semiconductor (CMOS) technology [1, 2].It also has highly suitable properties as a mask for silicon bulk micro-machining, as it exhibits very low etch rates in potassium hydroxide (used for anisotropic etching of silicon) [].While substantial characterization and.

Titanium - Titanium - Compounds: In its compounds, titanium exhibits oxidation states of +2, +3, and +4, as in the oxygen compounds titanium monoxide, TiO, dititanium trioxide, Ti2O3, and titanium dioxide, TiO2, respectively.

The +4 oxidation state is the most stable. The chemistry of titanium in the +2 state is rather restricted. By contrast, many compounds are formed by titanium in the +3 state. SPF uses extreme temperatures (up to °F) in conjunction with argon gas to form high-strength alloys into complex shapes in a single step.

During the cycle, the heated material is clamped between a cavity and a plate. The material is then forced into the cavity by .Titanium-containing porous silica with a mesostructured unit as secondary pore walls has been synthesized at room temperature by a modified sol−gel method using a structure-directing agent.

The transparent gel formed as a precursor resulted in high titanium incorporation in the silicate framework of up to 15 mol % Ti. The increase in Ti in the silicate network was accompanied by a change in.Nanomaterials describe, in principle, materials of which a single unit small sized (in at least one dimension) between 1 and nm (the usual definition of nanoscale).

Nanomaterials research takes a materials science-based approach to nanotechnology, leveraging advances in materials metrology and synthesis which have been developed in support of microfabrication research.