Grain boundary segregation engineering in as-sintered molybdenum for improved ductility

The characteristics of grain boundaries and their influence on the mechanical properties have become key issues in recent research on structural materials. Especially in molybdenum, grain boundary segregation plays a significant role regarding ductility and strength. In this study as-sintered condit...

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Bibliographic Details
Published inScripta materialia Vol. 156; pp. 60 - 63
Main Authors Leitner (née Babinsky), K., Lutz, D., Knabl, W., Eidenberger-Schober, M., Huber, K., Lorich, A., Clemens, H., Maier-Kiener, V.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.11.2018
Subjects
Atom probe tomography
Grain boundary segregation engineering
Intergranular embrittlement
Molybdenum
Solute decoration
Transmission Kikuchi diffraction
Grain boundary segregation engineering
Transmission Kikuchi diffraction
Solute decoration
Molybdenum
Atom probe tomography
Intergranular embrittlement
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Summary:The characteristics of grain boundaries and their influence on the mechanical properties have become key issues in recent research on structural materials. Especially in molybdenum, grain boundary segregation plays a significant role regarding ductility and strength. In this study as-sintered conditions of technically pure as well as boron and carbon doped molybdenum were mechanically characterized by bending tests and correspondingly analyzed by atom probe tomography to understand the differences in mechanical behavior after alloying. Strategies for improving the ductility of molybdenum are discussed with special focus on grain boundary segregation. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2018.07.008