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Chapter 22

Chapter 22. Titanium. Titanium Manufacturing • Titanium Alloys • Titanium Fabrication • Titanium Properties. Titanium alloys are designated by their UNS numbers and ASTM grade numbers.

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Chapter 22

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  1. Chapter 22 Titanium Titanium Manufacturing • Titanium Alloys • Titanium Fabrication • Titanium Properties

  2. Titanium alloys are designated by their UNS numbers and ASTM grade numbers.

  3. Oxygen, nitrogen, and carbon are interstitial elements that cause significant hardening of titanium and must be strictly controlled.

  4. The microstructure of Ti-5Al-2.5Sn that is hot-worked below the alpha transus and annealed above the beta transus consists of coarse, plate-like alpha phase.

  5. When titanium is fusion welded, it must be protected on both sides of the weld with shielding gas to ensure that the hot metal does not pick up interstitial elements as it cools.

  6. Titanium alloys have good strength-to-weight ratios at moderate and low temperatures.

  7. Titanium will ignite if exposed to flowing dry chlorine. A minimum amount of water is required to maintain the protective oxide film.

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