Metallurgical Transactions

, Volume 2, Issue 9, pp 2599–2605 | Cite as

Strength increase in Ti 35 Wt Pct Nb through step-aging

  • M. G. Mendiratta
  • G. Lütjering
  • S. Weissman
Mechanical Behavior


The room temperature tensile properties of precipitation-hardened Ti−Nb alloys were correlated to the microstructure obtained by aging in the (α+β) phase field. Balanced strength properties with a flow stress of 100 ksi and an elongation to fracture of 4 pct were obtained by means of step aging. The distribution and size of the particles formed by step aging controlled the dislocation-particle interaction. The large α particles precipitated by first aging at 550°C imparted increased ductility while the smaller metastable particles precipitated by subsequent reaging at 400°C conferred a substantial increase in flow stress.


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Copyright information

© The Metallurgical Society of American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc., and American Society for Metals 1971

Authors and Affiliations

  • M. G. Mendiratta
    • 1
    • 2
  • G. Lütjering
    • 1
    • 2
  • S. Weissman
    • 3
  1. 1.Lehigh UniversityBethlehen
  2. 2.Materials Research CenterAllied Chemical CorpMorristown
  3. 3.Materials Research LaboratoryRutgers UniversityNew BrunswidUSA

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