High-stiffness and strength porous maraging steel via topology optimization and selective laser melting

Akihiro Takezawa, Yuichiro Koizumi, Makoto Kobashi

研究成果: Article査読

25 被引用数 (Scopus)

抄録

Recent additive manufacturing technologies can be used to fabricate porous metals with precise internal pore structures and effective performance. We use topology optimization to derive an optimal pore structure shape with high stiffness that is verified experimentally. The design maximizes the effective bulk modulus and isotropic stiffness, and the performance is compared with Hashin–Shtrikman (HS) bounds. The optimized structure is fabricated via selective laser melting of maraging steel, which is a high-strength, iron-nickel steel that cannot easily be made porous with conventional methods. The optimal porous structure achieved 85% of the performance of the HS upper bound in numerical simulations, and at least 90% of them were realized in compressive testing. Finally, the performance is discussed relative to that of other metals.

本文言語English
ページ(範囲)194-202
ページ数9
ジャーナルAdditive Manufacturing
18
DOI
出版ステータスPublished - 2017 12 1

ASJC Scopus subject areas

  • 生体医工学
  • 材料科学(全般)
  • 工学(その他)
  • 産業および生産工学

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