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

  • Mechanical Behavior
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Abstract

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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Author notes

  1. M. G. Mendiratta (Postdoctoral Fellow) & G. Lütjering (Postdoctoral Fellow Staff Member)

    Present address: Materials Research Laboratory, Rutgers University, New Brunswid, USA

Authors and Affiliations

  1. Lehigh University, Bethlehen, Pa.

    M. G. Mendiratta (Postdoctoral Fellow) & G. Lütjering (Postdoctoral Fellow Staff Member)

  2. Materials Research Center, Allied Chemical Corp, Morristown, N.J.

    M. G. Mendiratta (Postdoctoral Fellow) & G. Lütjering (Postdoctoral Fellow Staff Member)

  3. Materials Research Laboratory, Rutgers University, New Brunswid, USA

    S. Weissman (Professor)

Authors
  1. M. G. Mendiratta
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  2. G. Lütjering
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  3. S. Weissman
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Additional information

M. G. MENDIRATTA and G. LUTJERING, formerly Graduate Student and Assistant Professor, respectively. Materials Research Laboratory, Rutgers University, New Brunswick, N. J.

This paper is based upon a thesis submitted by M. G. MENDIRATTA in partial fulfillment of the requirements of the degree of Doctor of Philosophy at Rutgers University.

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Mendiratta, M.G., Lütjering, G. & Weissman, S. Strength increase in Ti 35 Wt Pct Nb through step-aging. Metall Trans 2, 2599–2605 (1971). https://doi.org/10.1007/BF02814900

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  • DOI: https://doi.org/10.1007/BF02814900

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