Evolution of shear bands and fatigue striations in a bulk metallic glass during fatigue

G. Y. Wang, P. K. Liaw, Y. Yokoyama, A. Inoue

研究成果: Article査読

15 被引用数 (Scopus)

抄録

Four-point-bend fatigue experiments are conducted on rectangular beam samples of a Zr 50Cu 37Al 10Pd 3 (in atomic percent) bulk metallic glass (BMG). In general, a fatigue crack initiates from the corner of the beam sample at the tensile stress surface and subsequently grows inside during cyclic loading. As a result, many shear bands form around the crack growth path due to the plastic deformation at the crack tip. Moreover, the size of the shear-band zone shows a good relationship with the stress intensity factor range, which is similar to the plastic zone in the crystalline alloys. Moreover, the shear-band spacing is consistent with the coarse fatigue striation spacing, which implies that the fatigue-crack growth in BMGs is related to the formation of shear bands. A reasonable mechanism is proposed to understand the fatigue-crack-growth behavior in BMGs.

本文言語English
ページ(範囲)96-100
ページ数5
ジャーナルIntermetallics
23
DOI
出版ステータスPublished - 2012 4月

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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