Mechanical properties and lattice misfit of γ/γ' strengthened Co-base superalloys in the Co-W-Al-Ti quaternary system

Zenk C, Neumeier S, Stone HJ, Göken M (2014)

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2014

Journal

Intermetallics Elsevier

Publisher: Elsevier

Book Volume: 55

Pages Range: 28-39

DOI: 10.1016/j.intermet.2014.07.006

Abstract

A continuous γ/γ' two-phase field has been identified extending between the ternary Co-Al-W system to the binary Co-Ti system. The lattice misfits of two phase γ/γ' alloys from the Co-Al-W-Ti quaternary system were measured by X-ray diffraction and found to be positive and vary linearly with composition. Differential scanning calorimetry measurements showed that the solidus and liquidus temperatures decrease from the W and Al rich end to the Ti rich end, whilst the γ' solvus temperature increases. Long term heat treatments identified the occurrence of discontinuous precipitation at the grain boundaries in many of the alloys studied. The high temperature strength and creep resistance of the quaternary alloys in the intermediate composition range surpassed those of the binary and ternary alloys. © 2014 Elsevier Ltd. All rights reserved.

Authors with CRIS profile

Christopher Zenk Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Steffen Neumeier Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Mathias Göken Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Related research project(s)

Single crystal y/y'-hardened Co-base superalloys - alloy development, heat treatment strategies and mechanical properties (B03) (SFB/TRR 103) SFB/TRR 103: Vom Atom zur Turbinenschaufel - wissenschaftliche Grundlagen für eine neue Generation einkristalliner Superlegierungen Jan. 1, 2012 - Dec. 31, 2015

Involved external institutions

University of Cambridge GB United Kingdom (GB)

How to cite

APA:

Zenk, C., Neumeier, S., Stone, H.J., & Göken, M. (2014). Mechanical properties and lattice misfit of γ/γ' strengthened Co-base superalloys in the Co-W-Al-Ti quaternary system. Intermetallics, 55, 28-39. https://dx.doi.org/10.1016/j.intermet.2014.07.006

MLA:

Zenk, Christopher, et al. "Mechanical properties and lattice misfit of γ/γ' strengthened Co-base superalloys in the Co-W-Al-Ti quaternary system." Intermetallics 55 (2014): 28-39.

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