Effect of fracture mechanism on low-cycle fatigue life of pure iron and low temperature

Desheng Xia, Jun Komotori, Masao Shimizu

研究成果: Article査読

抄録

Low-cycle fatigue tests were performed at -140 °C using commercial-grade pure iron having an average ferrite grain size of 400 μm. The effect of fracture mechanism on fatigue life properties was investigated, especially on the dispersion of fatigue lives in the high plastic strain range (ΔεP) where fracture occurs in an internal fracture mode. Fracture surfaces were observed using a scanning electron microscope. The dispersion of fatigue lives is due mainly to the difference of internal fracture mode. Specimens fractured by intersection of a deformation twin and a grain boundary (T-B type) show longer fatigue lives than those fractured by intersection of deformation twins (T-T type) or a deformation twin and an inclusion (T-I type). The effect of grain size at the internal fracture origination site was also discussed.

本文言語English
ページ(範囲)665-668
ページ数4
ジャーナルNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
63
608
DOI
出版ステータスPublished - 1997
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

フィンガープリント

「Effect of fracture mechanism on low-cycle fatigue life of pure iron and low temperature」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