On grain boundary segregation in molybdenum materials

Journal article

Publication Details

Author(s): Leitner (Babinsky) K, Felfer P, Holec D, Cairney J, Knabl W, Lorich A, Clemens H, Primig S
Journal: Materials and Design
Publication year: 2017
Volume: 135
Pages range: 204-212
ISSN: 0264-1275


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.

FAU Authors / FAU Editors

Felfer, Peter Prof. Dr.
Juniorprofessor für Werkstoffwissenschaften (3D-Nanoanalytik und Atomsondenmikroskopie)

Additional Organisation
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

External institutions with authors

Montanuniversität Leoben
University of Sydney

How to cite

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

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


Last updated on 2019-28-05 at 13:19