Nano-size carbide-reinforced Ni matrix composite prepared by selective laser melting

• 来源期刊: 纳米材料科学（英文版）
• 年，卷（期）: 2020,（4）
• 页码范围: 316-322
• 页数: 7页
• 语种: 中文

摘要

Thermally stable nano-size ceramic particles are the preferred reinforcements for superalloys as they improve the alloys'microstructural stability and high-temperature properties. In this work, very dense and crack-free carbide-reinforced GTD222 (nickel-based superalloy) composites were prepared via selective laser melting (SLM). The distribution of TiC nanoparticles presents a three-dimensional (3D) network structure in the SLMed TiC/GTD222 composite. Mechanical testing revealed that the SLMed TiC/GTD222 composite has superior strength (UTS=1320 MPa, YS=1100 MPa) compared to the SLMed GTD222 superalloy. The GTD22 alloy reinforced with carbide nanoparticles’distinctive microstructure and its excellent mechanical properties for is discussed.