Abstract
Under the constant potential fatigue crack was propagated in pure titanium polycrystal in NaCl aqueous solution which had very small effect on the fatigue crack propagation rate. The polarization current during the fatigue crack propagation was measured and the electric charge passed during one fatigue cycle was calculated. The amount of fresh bare surface produced at the crack tip during one fatigue loading was quantified by the charge, and this related linearly to the crack propagation rate. This suggests that the shapes of the crack tip show the similar profile through the tested ΔK range. By comparing with the plastic zone size and the crack tip opening displacement, it is also concluded that the fatigue crack propagation mechanism directly relates to the creation of fresh bare surface at the crack tip, not directly to the plastic zone size or the crack tip opening displacement.
| Original language | English |
|---|---|
| Pages (from-to) | 870-874 |
| Number of pages | 5 |
| Journal | ISIJ International |
| Volume | 31 |
| Issue number | 8 |
| Publication status | Published - 1991 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Metals and Alloys
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Relation between the amount of fresh bare surface at the crack tip and the fatigue crack propagation rate. / Shimojo, Masayuki; Higo, Yakichi; Nunomura, Shigetomo.
In: ISIJ International, Vol. 31, No. 8, 1991, p. 870-874.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Relation between the amount of fresh bare surface at the crack tip and the fatigue crack propagation rate
AU - Shimojo, Masayuki
AU - Higo, Yakichi
AU - Nunomura, Shigetomo
PY - 1991
Y1 - 1991
N2 - Under the constant potential fatigue crack was propagated in pure titanium polycrystal in NaCl aqueous solution which had very small effect on the fatigue crack propagation rate. The polarization current during the fatigue crack propagation was measured and the electric charge passed during one fatigue cycle was calculated. The amount of fresh bare surface produced at the crack tip during one fatigue loading was quantified by the charge, and this related linearly to the crack propagation rate. This suggests that the shapes of the crack tip show the similar profile through the tested ΔK range. By comparing with the plastic zone size and the crack tip opening displacement, it is also concluded that the fatigue crack propagation mechanism directly relates to the creation of fresh bare surface at the crack tip, not directly to the plastic zone size or the crack tip opening displacement.
AB - Under the constant potential fatigue crack was propagated in pure titanium polycrystal in NaCl aqueous solution which had very small effect on the fatigue crack propagation rate. The polarization current during the fatigue crack propagation was measured and the electric charge passed during one fatigue cycle was calculated. The amount of fresh bare surface produced at the crack tip during one fatigue loading was quantified by the charge, and this related linearly to the crack propagation rate. This suggests that the shapes of the crack tip show the similar profile through the tested ΔK range. By comparing with the plastic zone size and the crack tip opening displacement, it is also concluded that the fatigue crack propagation mechanism directly relates to the creation of fresh bare surface at the crack tip, not directly to the plastic zone size or the crack tip opening displacement.
UR - http://www.scopus.com/inward/record.url?scp=0025749376&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0025749376&partnerID=8YFLogxK
M3 - Article
VL - 31
SP - 870
EP - 874
JO - ISIJ International
JF - ISIJ International
SN - 0915-1559
IS - 8
ER -