Fabrication of SUS316L harmonic structure compacts by Bi-modal milling process

Koki Yagi, Bhupendra Sharma, Mie Kawabata, Kei Ameyama

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)


The synergy of high strength and ductility is crucial for industrial applications. Grain refinement strengthening is a well-known method for strength improvement. However, it leads to poor ductility due to plastic strain instability in the early stage of deformation. Recently developed novel heterogeneous microstructure designed materials called "Harmonic Structure" (HS) can overcome this strength-ductility trade-of. HS designed materials consist of grain size gradient wherein fine grains ('Shell') form a connected network surrounding coarse grains ('Core'). The HS materials exhibit an outstanding combination of strength and ductility that is associated with high strain hardening due to suppressing local deformation. However, the conventional mechanical milling (MM) process for fabricating HS designed materials is time-consuming. Therefore, in the present study, a novel Bi-modal Milling (BiM) process is proposed to achieve HS designed materials more eficiently in a shorter time. The HS design has been applied to SUS316L powder via conventional MM and novel BiM process. Both the HS compacts exhibited approximately similar mechanical properties. Therefore, the proposed BiM technique is more appropriate for the industrial production of HS designed materials.

ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
出版ステータス出版済み - 2020

All Science Journal Classification (ASJC) codes

  • 機械工学
  • 産業および生産工学
  • 金属および合金
  • 材料化学


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