Crack initiation and propagation in {l_angle}110{r_angle} oriented copper single crystals under cyclic deformation

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Acta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-7151(94)00270-R· OSTI ID:27897

Vinogradov, A; Hashimoto, S; Miura, S ^[1]

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1. Kyoto Univ. (Japan). Dept. of Engineering Science

Fatigue crack initiation and propagation were studied on compact tension specimens of pure copper single crystals having [110] tensile axis. Two stages of crack propagation were found in accordance with different dependence of crack length on the number of cycles: the first stage of accelerating growth and the second stage of steady-state motion. Phenomenological models describing an acceleration of crack growth on the first stage and a constant velocity on the second are suggested. It was also shown that during the first stage a crack moves directly along one of persistent slip bands (PSBs) and the propagation direction frequently changes during the second stage. This behavior can be explained semi-quantitatively in the framework of the Essman Gosele Mughrabi model of the PSB structure.

• OSTI ID: 27897
• Journal Information: Acta Metallurgica et Materialia, Journal Name: Acta Metallurgica et Materialia Journal Issue: 2 Vol. 43; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER
CRACK PROPAGATION
FATIGUE
OPTICAL MICROSCOPY
SAMPLE PREPARATION
SLIP
TENSILE PROPERTIES