抄録
Fatigue crack propagation tests at different stress ratios of 0.1 and 0.5 have been performed on microsized Ni-P amorphous alloy specimens to investigate the influence of stress ratio in the crack growth properties of microsized materials. The specimens tested were cantilever-beam-type with dimensions of 10 × 12 × 50 μm 3 prepared by focused ion beam machining. Notches with a depth of 3 μm were introduced in all specimens. The entire set of fatigue tests as performed using a newly developed fatigue testing machine in air at room temperature. Fine stripes deduced to be striations were observed on the fatigue fracture surface. Careful measurements of the striation spacings were made. Fatigue crack propagation rate, that is striation spacing, is plotted as a function stress intensity factor range. Fatigue crack propagation rate at stress-ratios of 0.1 and 0.5 in microsized Ni-P amorphous alloy specimens are given by da/dN approx. 1.3 × 10 -8 ΔK 1.16 and da/dN approx. 3.7 × 10 -8 ΔK 0.5, respectively. At a given ΔK, crack propagation rate at a stress ratio of 0.5 was higher than that at 0.1. It is considered that a decrease in crack propagation rate at stress ratio of 0.1 is due to a decrease in effective stress intensity factor range ΔK eff, by the effect of crack closure.
| 元の言語 | English |
|---|---|
| ホスト出版物のタイトル | Materials Research Society Symposium - Proceedings |
| 出版者 | Materials Research Society |
| ページ | 247-252 |
| ページ数 | 6 |
| 巻 | 605 |
| 出版物ステータス | Published - 2000 |
| 外部発表 | Yes |
| イベント | Materials Science of Microelectromechanical Systems (MEMS) Devices II - Boaton, MA, USA 継続期間: 1999 11 29 → 1999 12 1 |
Other
| Other | Materials Science of Microelectromechanical Systems (MEMS) Devices II |
|---|---|
| 市 | Boaton, MA, USA |
| 期間 | 99/11/29 → 99/12/1 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
これを引用
Fatigue properties for micro-sized Ni-P amorphous alloy specimens. / Maekawa, S.; Takashima, K.; Shimojo, Masayuki; Higo, Y.; Swain, M. V.
Materials Research Society Symposium - Proceedings. 巻 605 Materials Research Society, 2000. p. 247-252.研究成果: Conference contribution
}
TY - GEN
T1 - Fatigue properties for micro-sized Ni-P amorphous alloy specimens
AU - Maekawa, S.
AU - Takashima, K.
AU - Shimojo, Masayuki
AU - Higo, Y.
AU - Swain, M. V.
PY - 2000
Y1 - 2000
N2 - Fatigue crack propagation tests at different stress ratios of 0.1 and 0.5 have been performed on microsized Ni-P amorphous alloy specimens to investigate the influence of stress ratio in the crack growth properties of microsized materials. The specimens tested were cantilever-beam-type with dimensions of 10 × 12 × 50 μm 3 prepared by focused ion beam machining. Notches with a depth of 3 μm were introduced in all specimens. The entire set of fatigue tests as performed using a newly developed fatigue testing machine in air at room temperature. Fine stripes deduced to be striations were observed on the fatigue fracture surface. Careful measurements of the striation spacings were made. Fatigue crack propagation rate, that is striation spacing, is plotted as a function stress intensity factor range. Fatigue crack propagation rate at stress-ratios of 0.1 and 0.5 in microsized Ni-P amorphous alloy specimens are given by da/dN approx. 1.3 × 10 -8 ΔK 1.16 and da/dN approx. 3.7 × 10 -8 ΔK 0.5, respectively. At a given ΔK, crack propagation rate at a stress ratio of 0.5 was higher than that at 0.1. It is considered that a decrease in crack propagation rate at stress ratio of 0.1 is due to a decrease in effective stress intensity factor range ΔK eff, by the effect of crack closure.
AB - Fatigue crack propagation tests at different stress ratios of 0.1 and 0.5 have been performed on microsized Ni-P amorphous alloy specimens to investigate the influence of stress ratio in the crack growth properties of microsized materials. The specimens tested were cantilever-beam-type with dimensions of 10 × 12 × 50 μm 3 prepared by focused ion beam machining. Notches with a depth of 3 μm were introduced in all specimens. The entire set of fatigue tests as performed using a newly developed fatigue testing machine in air at room temperature. Fine stripes deduced to be striations were observed on the fatigue fracture surface. Careful measurements of the striation spacings were made. Fatigue crack propagation rate, that is striation spacing, is plotted as a function stress intensity factor range. Fatigue crack propagation rate at stress-ratios of 0.1 and 0.5 in microsized Ni-P amorphous alloy specimens are given by da/dN approx. 1.3 × 10 -8 ΔK 1.16 and da/dN approx. 3.7 × 10 -8 ΔK 0.5, respectively. At a given ΔK, crack propagation rate at a stress ratio of 0.5 was higher than that at 0.1. It is considered that a decrease in crack propagation rate at stress ratio of 0.1 is due to a decrease in effective stress intensity factor range ΔK eff, by the effect of crack closure.
UR - http://www.scopus.com/inward/record.url?scp=0034513169&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034513169&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0034513169
VL - 605
SP - 247
EP - 252
BT - Materials Research Society Symposium - Proceedings
PB - Materials Research Society
ER -