We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Using Selective Electron Beam Melting to Enhance the High‐Temperature Strength and Creep Resistance of NiAl–28Cr–6Mo In Situ Composites.
- Authors
Förner, Andreas; Vollhüter, Jan; Krapf, Anna; Jamjoom, Abdullah; Hausmann, Daniel; Wahlmann, Benjamin; Fu, Zongwen; Körner, Carolin; Neumeier, Steffen; Göken, Mathias
- Abstract
By increasing the density of interfaces in NiAl–CrMo in situ composites, the mechanical properties can be significantly improved compared to conventionally cast material. The refined microstructure is achieved by manufacturing through electron beam powder bed fusion (PBF‐EB). By varying the process parameters, an equiaxed or columnar cell morphology can be obtained, exhibiting a plate‐like or an interconnected network of the (Cr,Mo) reinforcement phase which is embedded in a NiAl matrix. The microstructure of the different cell morphologies is investigated in detail using scanning electron microscope, transmission electron microscopy, and atom probe tomography. For both morphologies, the mechanical properties at elevated temperatures are analyzed by compression and creep experiments parallel and perpendicular to the building direction. In comparison to cast NiAl and NiAl–(Cr, Mo), the yield strength of the PBF‐EB fabricated specimens is significantly improved at temperatures up to 1,027 °C. While the columnar morphology exhibits the best improved mechanical properties at high temperatures, the equiaxial morphology shows nearly ideal isotropic mechanical behavior, which is a substantial advantage over directionally solidified material.
- Subjects
ELECTRON beam furnaces; CREEP (Materials); ATOM-probe tomography; CELL morphology; SCANNING electron microscopes
- Publication
Advanced Engineering Materials, 2023, Vol 25, Issue 15, p1
- ISSN
1438-1656
- Publication type
Article
- DOI
10.1002/adem.202300407