Unique metallurgical microstructures and characteristics of nano-amorphous state bulk alloys formed under high gravity by very high speed centrifugal casting

Yasubumi Furuya, Tsuyoshi Miura, Teiko Okazaki, Masanori Yokoyama, Hisamichi Kimura, Shuji Takahashi, Rikio Honda

研究成果: Conference contribution

抄録

An innovative "Rapid-Solidification Centrifugal Casting (RSCC) Process" was applied to manufacturing more high functional Fe-based magnetic alloys and some amorphous bulk metallic glassy alloys (BMGs) components. The molten alloys were poured into copper mold with rotation speed up to 6000rpm which can cause the maximum 4000 times as much centrifugal pressurization force as gravity. The bulk components of ring or very small three dimensional component samples of Fe and Zr alloy systems were successfully fabricated within only a few seconds at one process from melts with more cheap production cost. The molten raw BMG alloys (ZrAl system) and Fe-based soft-magnetic alloys(FeGaAl and FeSiB systems ) by high frequency induction heating method were poured into copper mold. The fabricated BMG components of artificial tooth and ring of ZrAlNiCu alloy system are almost amorphous state by XRD profiles. Especially, the soft magnetic properties of two Fe-based alloys showed drastic change and were enhanced generally depending on the unique very fine, nano-scale columnar grains with strong texture toward radius direction for FeGaAl(Galfenol) alloy. The magnetization saturation Bs was enhanced up to 1.97T in FeSiBPCu alloy. In consequence, according to synergistic effect of rapid solidification and high pressurization casting in this manufacturing process, RSCCP has the technical advantages of expansion of element composition, uniformity of the quality, reduction of internal defects and prevention of degradation at the time of secondary fabrication process of nano-crystalline- structured alloys and BMGs.

本文言語English
ホスト出版物のタイトルBulk Metallic Glasses and their Applications
ページ25-29
ページ数5
DOI
出版ステータスPublished - 2011 12 1
イベント2010 MRS Fall Meeting - Boston, MA, United States
継続期間: 2010 11 292010 12 3

出版物シリーズ

名前Materials Research Society Symposium Proceedings
1300
ISSN(印刷版)0272-9172

Other

Other2010 MRS Fall Meeting
国/地域United States
CityBoston, MA
Period10/11/2910/12/3

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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