A novel Bimodal Milling (BiM) approach to achieve harmonic structured SUS316L with controlled microstructure and outstanding mechanical performance

Bhupendra Sharma, Koki Yagi, Sanjay K. Vajpai, Hiroshi Fujiwara, Kei Ameyama

研究成果: ジャーナルへの寄稿学術誌査読

2 被引用数 (Scopus)

抄録

A novel systematic fabrication approach, called Bi-modal Milling (BiM), is proposed to prepare the austenitic steel (SUS316L) with peculiar Bimodal grain size structure, called Harmonic Structured (HS), with precisely controlled microstructural features of the fine-grained Shell and coarse-grained Core zones. The proposed technique consists of controlled mechanical milling of coarse- and fine-sized powders together to form the desired thickness of a layer of fine-sized powders over the coarse particles followed by consolidation of milled powders. The grain size and fraction of shell region were effectively controlled using different proportions (20–80%) of initial powders and milling time (36–180 ks) via producing milled powders with hierarchically distributed fine/coarse grains due to repeated coating of severe plastically deformed fine-grained powders to the coarse-grained powder particles. The BiM HS compacts exhibited considerably higher strength (σUTS), and ductility as compared to those with both heterogeneous and HS compacts having comparable fractions of Shell and Core.

本文言語英語
論文番号117188
ジャーナルPowder Technology
399
DOI
出版ステータス出版済み - 2月 2022
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 化学工学(全般)

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