Production, process and properties of 3d printed multi-metal parts

Julkaisun otsikon käännös: Production, process and properties of 3d printed multi-metal parts

Tutkimustuotos: Doctoral ThesisCollection of Articles

Abstrakti

Additive manufacturing (AM), also known as 3D printing, is an advanced technology that enables the fabrication of multi-material parts with intricate internal structures and lightweight lattice designs. Compared to conventional manufacturing methods, AM offers opportunities for engineering optimization and performance enhancements. Its material efficiency minimizes waste and usage, aligning with sustainability goals and economic considerations. Particularly, multi-metal parts additive manufacturing (MMAM) represents a transformative approach that integrates multiple metals within a single component, leading to superior material properties, structural complexity, and functional optimization. Despite its promising potential, multi-metal AM faces several limitations and challenges. Key issues include maintaining metallurgical compatibility between dissimilar metals, controlling thermal stresses and distortions during the process, achieving high-quality interfaces between different materials, and high production costs associated with some specific AM technologies. Additionally, the development of reliable process parameters, effective post-processing techniques, and robust quality control methods remains critical for the widespread adoption of multi-metal AM. Addressing these challenges is essential to unlock the full potential of multi-metal additive manufacturing and expand its applications across various industries, including aerospace, automotive, and biomedical engineering. This dissertation explores the feasibility of utilizing cost-effective additive manufacturing (AM) technologies to produce multi-metal parts. The study evaluates the properties, challenges, and limitations associated with this manufacturing approach, providing valuable insights into its potential applications and advancements in the field of multi-metal AM. Additionally, the interface between the two metals is specifically characterized in terms of their microstructural features, including porosity, intermetallic compound formation, and hardness mismatch. The dissertation employs material extrusion (MEX) and vat photopolymerization (VPP) additive manufacturing methods, known for their high availability and cost-effectiveness. These desktop printers are widely utilized in engineering, product design, dentistry, and other fields requiring high-resolution, intricate 3D printed parts. However, multi-metal parts produced using MEX and VPP technologies often exhibit poor mechanical properties inherent to sintered parts, primarily due to high levels of porosity. The de-binding process results in the formation of voids among the metal particles, making it challenging to diminish these voids during the sintering process, even with elevated temperatures and prolonged durations.
Julkaisun otsikon käännösProduction, process and properties of 3d printed multi-metal parts
AlkuperäiskieliEnglanti
PätevyysTohtorintutkinto
Myöntävä instituutio
  • Aalto-yliopisto
Valvoja/neuvonantaja
  • Salmi, Mika, Vastuuprofessori
  • Partanen, Jouni, Ohjaaja
Kustantaja
Painoksen ISBN978-952-64-2175-9
Sähköinen ISBN978-952-64-2176-6
TilaJulkaistu - 2024
OKM-julkaisutyyppiG5 Artikkeliväitöskirja

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