Predicting gas and shrinkage porosity in solidification microstructure: A coupled three-dimensional cellular automaton model

Gu C., Ridgeway C. D., ÇİNKILIÇ E., Lu Y., Luo A. A.

Journal of Materials Science and Technology, cilt.49, ss.91-105, 2020 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 49
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.jmst.2020.02.028
  • Dergi Adı: Journal of Materials Science and Technology
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, Compendex, ICONDA Bibliographic, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.91-105
  • Anahtar Kelimeler: Cellular automaton, Microporosity evolution, Microstructure simulation, Solidification
  • Hakkari Üniversitesi Adresli: Hayır

Özet

Porosity formation during solidification of aluminum-based alloys, due to hydrogen gas and alloy shrinkage, has been a major issue adversely affecting the performance of solidification products such as castings, welds or additively manufactured components. A three-dimensional cellular automaton (CA) model has been developed, for the first time, to couple the predictions of hydrogen-induced gas porosity and shrinkage porosity during solidification microstructure evolution of a binary Al-Si alloy. The CA simulation results are validated under various cooling rates by porosity measurements in an experimental wedge die casting using X-ray micro computed tomography (XMCT) technique. This validated porosity moel provides a critical link in integrated computation materials engineering (ICME) design and manufacturing of solidification products.