Fatigue properties for micro-sized Ni-P amorphous alloy specimens

S. Maekawa, K. Takashima, Masayuki Shimojo, Y. Higo, M. V. Swain

研究成果: Conference contribution

6 引用 (Scopus)

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
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 291999 12 1

Other

OtherMaterials Science of Microelectromechanical Systems (MEMS) Devices II
Boaton, MA, USA
期間99/11/2999/12/1

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Amorphous alloys
Fatigue of materials
Fatigue crack propagation
Crack propagation
Stress intensity factors
Crack closure
Fatigue testing
Focused ion beams
Cantilever beams
Machining
Air
Temperature

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

これを引用

Maekawa, S., Takashima, K., Shimojo, M., Higo, Y., & Swain, M. V. (2000). Fatigue properties for micro-sized Ni-P amorphous alloy specimens. : Materials Research Society Symposium - Proceedings (巻 605, pp. 247-252). Materials Research Society.

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

Maekawa, S, Takashima, K, Shimojo, M, Higo, Y & Swain, MV 2000, Fatigue properties for micro-sized Ni-P amorphous alloy specimens. : Materials Research Society Symposium - Proceedings. 巻. 605, Materials Research Society, pp. 247-252, Materials Science of Microelectromechanical Systems (MEMS) Devices II, Boaton, MA, USA, 99/11/29.
Maekawa S, Takashima K, Shimojo M, Higo Y, Swain MV. Fatigue properties for micro-sized Ni-P amorphous alloy specimens. : Materials Research Society Symposium - Proceedings. 巻 605. Materials Research Society. 2000. p. 247-252
Maekawa, S. ; Takashima, K. ; Shimojo, Masayuki ; Higo, Y. ; Swain, M. V. / Fatigue properties for micro-sized Ni-P amorphous alloy specimens. Materials Research Society Symposium - Proceedings. 巻 605 Materials Research Society, 2000. pp. 247-252
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