Abstract

Eutectic NiAl-(Cr,Mo) composites are promising high temperature materials due to their high melting point, excellent oxidation behavior and low density. To enhance the strength, hardness and fracture toughness, high cooling rates are beneficial to obtain a fine cellular-lamellar microstructure. This can be provided by the additive process of selective electron beam melting. The very high temperature gradient achieved in this process leads to the formation of the finest microstructure that has ever been reported for NiAl-(Cr,Mo) in-situ composites. A very high hardness and fracture toughening mechanisms were observed. This represents a feasibility study towards additive manufacturing of eutectic NiAl-(Cr,Mo) in-situ composites by selective electron beam melting.

Details

Title
Nanoscaled eutectic NiAl-(Cr,Mo) composites with exceptional mechanical properties processed by electron beam melting
Author
Förner Andreas 1 ; Giese, S 1 ; Arnold, C 2 ; Felfer, P 1 ; Körner, C 2 ; Neumeier, S 1 ; Göken, M 1 

 Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Materials Science and Engineering, Institute I, General Materials Properties, Erlangen, Germany (GRID:grid.5330.5) (ISNI:0000 0001 2107 3311) 
 Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Chair of Materials Science and Engineering for Metals, Department of Materials Science and Engineering, Erlangen, Germany (GRID:grid.5330.5) (ISNI:0000 0001 2107 3311) 
Publication year
2020
Publication date
2020
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2442833547
Copyright
© The Author(s) 2020. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.