Alternative strain aging effect for fatigue of ductile bulk glassy alloys

Yoshihiko Yokoyama, Markus Wilde, Katsuyuki Fukutani, Akihisa Inoue

研究成果: Article査読

5 被引用数 (Scopus)

抄録

The metal fatigue mechanism of bulk glassy alloys (BGAs) resulting from the ductile nature of a glassy alloy differs from that of the conventional crystalline engineering alloys. Extreme hardening of the fatigue crack tip on the fatigue-fractured surface of the Zr- and Pd-based BGAs was usually observed just before the final fracture. Embrittlement around the fatigue crack tip, generated by excessive hardening to stop the fatigue crack propagation, significantly decreases fatigue fracture toughness. Hardening by hydrogen was also considered as an alternative mechanism of the strain aging effect in fatigue of glassy alloys because the second phase cannot be observed on a fatigue fracture surface, and only hydrogen promotes hardening, maintaining a glass structure. Hydrogen analysis of a micro area region was attempted with nuclear reaction analysis which used accelerated ion 15N up to 6.385 MeV to determine the hydrogen concentration of the fatigue-fracture surface. We successfully measured the characteristic enrichment of hydrogen near the fatigue-fracture surface.

本文言語English
ページ(範囲)1261-1265
ページ数5
ジャーナルMaterials Transactions
48
6
DOI
出版ステータスPublished - 2007 6

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

フィンガープリント 「Alternative strain aging effect for fatigue of ductile bulk glassy alloys」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル