Fracture behavior of micro-sized specimens with fatigue pre-crack prepared from a Ni-P amorphous alloy thin film

Kazuki Takashima, Masayuki Shimojo, Yakichi Higo, Michael V. Swain

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

Fracture toughness tests have been performed for an electroless deposited Ni-P amorphous alloy thin film with different crack growth directions, which are perpendicular and parallel to the deposition growth direction. Cantilever beam type specimens with dimensions of 10 by 10 by 50 μm 3 were prepared from a Ni-P amorphous thin film, and notches with different direction were introduced by focused ion beam machining. Fatigue pre-cracks were introduced ahead of the notches. Both introduction of fatigue pre-cracks and fracture tests were performed using a newly developed mechanical testing machine for micro-sized specimens. Fracture behavior is different between the two types of specimens. K IC values were not obtained as the criteria of plane strain requirements were not satisfied for this size of the specimen, so that the provisional fracture toughness K Q values were obtained. The K Q value of the specimen with crack propagation direction being parallel to the deposition growth direction was 7.3 MPa m 1/2, while that with crack propagation direction being perpendicular to the deposition growth direction was 4.2 MPa m 1/2. These results suggest that the electroless deposited amorphous alloy thin film has anisotropic mechanical properties.

Original languageEnglish
Title of host publicationASTM Special Technical Publication
PublisherAmerican Society for Testing and Materials
Pages72-81
Number of pages10
Edition1413
Publication statusPublished - 2001
Externally publishedYes
EventMechanical Properties of Structural Films - Orlando, FL, United States
Duration: 2000 Nov 152000 Nov 16

Other

OtherMechanical Properties of Structural Films
CountryUnited States
CityOrlando, FL
Period00/11/1500/11/16

Fingerprint

Amorphous alloys
Crack propagation
Fatigue of materials
Cracks
Thin films
Fracture toughness
Mechanical testing
Focused ion beams
Cantilever beams
Amorphous films
Machining
Mechanical properties

Keywords

  • Amorphous alloy
  • Anisotropy
  • Fracture toughness
  • Ni-P
  • Thin film

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Takashima, K., Shimojo, M., Higo, Y., & Swain, M. V. (2001). Fracture behavior of micro-sized specimens with fatigue pre-crack prepared from a Ni-P amorphous alloy thin film. In ASTM Special Technical Publication (1413 ed., pp. 72-81). American Society for Testing and Materials.

Fracture behavior of micro-sized specimens with fatigue pre-crack prepared from a Ni-P amorphous alloy thin film. / Takashima, Kazuki; Shimojo, Masayuki; Higo, Yakichi; Swain, Michael V.

ASTM Special Technical Publication. 1413. ed. American Society for Testing and Materials, 2001. p. 72-81.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Takashima, K, Shimojo, M, Higo, Y & Swain, MV 2001, Fracture behavior of micro-sized specimens with fatigue pre-crack prepared from a Ni-P amorphous alloy thin film. in ASTM Special Technical Publication. 1413 edn, American Society for Testing and Materials, pp. 72-81, Mechanical Properties of Structural Films, Orlando, FL, United States, 00/11/15.
Takashima K, Shimojo M, Higo Y, Swain MV. Fracture behavior of micro-sized specimens with fatigue pre-crack prepared from a Ni-P amorphous alloy thin film. In ASTM Special Technical Publication. 1413 ed. American Society for Testing and Materials. 2001. p. 72-81
Takashima, Kazuki ; Shimojo, Masayuki ; Higo, Yakichi ; Swain, Michael V. / Fracture behavior of micro-sized specimens with fatigue pre-crack prepared from a Ni-P amorphous alloy thin film. ASTM Special Technical Publication. 1413. ed. American Society for Testing and Materials, 2001. pp. 72-81
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