Details

Autor(en) / Beteiligte

• Wei, W.
• Xiao, J.C.
• Wang, C.F.
• Cheng, Q.
• Guo, F.J.
• He, Q.
• Wang, M.S.
• Jiang, S.Z.
• Huang, C.X.

Titel

Hierarchical microstructure and enhanced mechanical properties of SLM-fabricated GH5188 Co-superalloy

Ist Teil von

• Materials science & engineering. A, Structural materials : properties, microstructure and processing, 2022-01, Vol.831, p.142276, Article 142276

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2022

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• In this paper, the GH5188 Co-based superalloy was fabricated by selective laser melting (SLM), and its microstructure was systematically investigated. A typical hierarchical microstructure with a texture along the building direction is formed during SLM, and each elongated grain consisted of extremely fine (<1 μm) cells. Meanwhile, the cell boundaries were enriched with W, Cr, and Mn, while Ni was diluted, which formed fine M23C6/M6C eutectic carbides (∼80 nm). Nano-indentation tests and tensile tests were applied to test the mechanical properties. The as-SLM samples exhibited excellent performance as well as nano-hardness, strength, and ductility when compared to forging and casting samples. These results suggested promising potential for SLM-fabricated GH5188 superalloy parts.