On grain boundary segregation in molybdenum materials

Leitner (Babinsky) K, Felfer P, Holec D, Cairney J, Knabl W, Lorich A, Clemens H, Primig S (2017)

Publication Status: Published

Publication Type: Journal article

Publication year: 2017

Journal

Materials & Design Elsevier

Publisher: ELSEVIER SCI LTD

Book Volume: 135

Pages Range: 204-212

DOI: 10.1016/j.matdes.2017.09.019

Abstract

The character and distribution of grain boundaries (GBs) inmolybdenum materials and their decoration with solutes may lead to strengthening or weakening effects which limits the structural application of Mo, especially in the recrystallized state, as as-deformed materials usually exhibit transgranular failure.Investigations of the structure and chemistry of GBs in Mo materials at the nanoscale are required to answer longstanding questions around their fracture behavior. We present a detailed investigation of segregation at a total of 22 high-angle GBs in Mo materials in their as-deformed and recrystallized states. We reveal the full crystallographic and chemical character of each individual GB by combining transmission Kikuchi diffraction and atom probe microscopy. We demonstrate that the detrimental elements P, N, and O segregate to all random high angle GBs. On the other hand, C-which has a strengthening effect-was only found at low-Sigma GBs in recrystallized materials. We support these experimental observations by first principle calculations. Our results provide an advance on grain boundary segregation engineering in these important technological materials. (C) 2017 Elsevier Ltd. All rights reserved.

Authors with CRIS profile

Peter Felfer Professur für Atom Probe Tomography

Additional Organisation(s)

Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM) Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Involved external institutions

Montanuniversität Leoben AT Austria (AT) PLANSEE SE AT Austria (AT) University of Sydney (USYD) AU Australia (AU)

How to cite

APA:

Leitner (Babinsky), K., Felfer, P., Holec, D., Cairney, J., Knabl, W., Lorich, A.,... Primig, S. (2017). On grain boundary segregation in molybdenum materials. Materials & Design, 135, 204-212. https://dx.doi.org/10.1016/j.matdes.2017.09.019

MLA:

Leitner (Babinsky), K., et al. "On grain boundary segregation in molybdenum materials." Materials & Design 135 (2017): 204-212.

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