4. Physical metallurgy and the various alloy classes
Ultrapure titanium has a pseudo-compact hexagonal structure known as the α phase up to 882°C. Above this temperature, called β-transus, the crystallographic structure becomes cubic-centered, and is called β-phase. Above 1,660°C, the β-phase transforms into a liquid phase, which boils off at 3,287°C.
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Figure 20 shows the effect of adding elements:
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Physical metallurgy and the various alloy classes
Bibliography
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(1) - PETRUNKO (A.N.) et al - . – * – TITAN, p. 5 à 7 (fév. 1995).
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(2) - FISHER (G.T.), TRAUT (D.E.) - . – * – Proc. Ti'92. Froes et Caplan ed., TMS p. 2393 à 2400 (1993).
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(3) - PAILLERE (P.), COHEN (J.) - . – * – Proc. Ti'88. Lacombe et al....
Also in our database
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BLAZY (P.), JDID (E.A.) - Flottation. Mécanismes et réactifs. - [J 3 350]...
2. Standardization
French standards
There are two French standards:
the AIR standard published by the Ministry of Defence; it is divided into the AIR 9182 standard for "unalloyed titanium sheet" and the AIR 9183 standard for "titanium alloy bars, billets, forgings and castings";
another published by the Association Française de Normalisation (AFNOR).
European standards
The basic...
3. Organizations
CEZUS
Titanium Development Association (TDA)
This association markets a 3.5-inch diskette on titanium and its alloys for the 1992 price of US$5.
TIMET Savoie
4. Economic data environment
In France, although AREVA NP has a small titanium sponge production capacity, it is not used due to overcapacity and very low prices (order of magnitude €15/kg). Only AREVA NP remelts ingots and transforms them into bars, slabs and wires, while Creusot Loire Industries produces plates and sheets.
Five companies produce finished forged parts (SAFRAN, IMPHY Issoire and Pamiers, Aubert & Duval and Forges de...
5. Marketing
Type and form of products sold
Two-thirds of the market consists of forged or rolled bars, with diameters ranging from a few millimeters (4 to 6) to 350 mm. The remainder is in the form of plates ranging from a few centimetres (heavy plates) to a few millimetres (thin plates for chemical or superplastic applications) in widths of between 600 and 2,000 mm. CEI also offers profiles.
Delivery times-quantities
The...
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