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Stacking faults in gamma prime Ni3(Al,Ti) precipitation hardened nickel-base alloys

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Abstract

Most high temperature nickel-base alloys are strengthened by a coherent, orderedγ′ precipitate of Ll2 structure. Examination of thin foils of these materials after various thermal and/or mechanical treatments has shown the presence of stacking faults in a variety of forms. Stacking faults are developed in conjunction with certain phase reactions, and during plastic deformation. The experimental evidence indicates that stacking fault energy is an important parameter determing the slip mode and strength at low and intermediate temperatures.

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Authors and Affiliations

  1. Pratt & Whitney Aircraft, Division of United Aircraft, Middletown, Conn.

    Bernard H. Kear, John M. Oblak & Anthony F. Giamei

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  1. Bernard H. Kear
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  2. John M. Oblak
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  3. Anthony F. Giamei
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Bernard H. Kear, John M. Oblak, and Anthony F. Giamei

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Kear, B.H., Oblak, J.M. & Giamei, A.F. Stacking faults in gamma prime Ni3(Al,Ti) precipitation hardened nickel-base alloys. Metall Trans 1, 2477–2486 (1970). https://doi.org/10.1007/BF03038373

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