Actions for Fracture Behavior of Micro-Sized Specimens with Fatigue Pre-Crack Prepared from a Ni-P Amorphous Alloy Thin Film

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Fracture Behavior of Micro-Sized Specimens with Fatigue Pre-Crack Prepared from a Ni-P Amorphous Alloy Thin Film / K. Takashima, M. Shimojo, Y. Higo, MV. Swain

Conference Author
Mechanical Properties of Structural Films (2000 : Orlando, Florida)
Physical Description
1 online resource (10 pages) : illustrations, figures, tables
Additional Creators
Takashima, K., Higo, Y., Shimojo, M., Swain, MV., American Society for Testing and Materials, and ASTM International
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Summary
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 ?m3 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. KIC 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 KQ values were obtained. The KQ value of the specimen with crack propagation direction being parallel to the deposition growth direction was 7.3 MPa m1/2, while that with crack propagation direction being perpendicular to the deposition growth direction was 4.2 MPa m1/2. These results suggest that the electroless deposited amorphous alloy thin film has anisotropic mechanical properties.
Dates of Publication and/or Sequential Designation
Volume 2001, Issue 1413 (January 2001)
Subject(s)
Other Subject(s)
ISBN
9780803154582 (e-ISBN)
9780803128897
0803128894
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 15.
Other Forms
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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Also available in PDF edition.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 2001. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
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