Tensile and high cycle fatigue tests of NiCo thin films

Jun Hyub Park, Yun Bae Chun, Yun-Jae Kim, Yong Hak Huh, Dong Joong Kang

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

2 Citations (Scopus)

Abstract

This paper represents the results of tensile and fatigue tests of NiCo thin films, to investigate the effect of size on mechanical properties. The "dog-bone" type Specimen with reduced section widths of 50 μm and 150 μm were fabricated on two 6 inch wafers using electro-plating process and MEMS processes. The NiCo film thickness of one wafer was 7.23 μm. The elastic moduli of the NiCo thin film specimens were about 183±4.1 GPa for the 50 μm specimens and about 148±8.4 GPa for 150 μm specimens. The ultimate tensile strengths for the 50 μm and 150 μm width specimens were 2431±87.8 and 2348±93.3 MPa, respectively. However, the difference between the tensile strengths of the specimens is low, at 3.3%. Fatigue tests were performed with 2 or 5 Hz in atmospheric air at room temperature under axial loading at a load ratio of R (=F min/F max) = 0.1 in a load-control until complete failure. Fatigue strength coefficients of the specimens with 50 and 150 μm width were 1785 and 1257 MPa, respectively. In addition, fatigue strength exponents of the specimens with 50 and 150 μm width were -0.0818 and -0.0629, respectively.

Original languageEnglish
Title of host publicationProcedia Engineering
Pages1303-1308
Number of pages6
Volume10
DOIs
Publication statusPublished - 2011
Event11th International Conference on the Mechanical Behavior of Materials, ICM11 - Como, Italy
Duration: 2011 Jun 52011 Jun 9

Other

Other11th International Conference on the Mechanical Behavior of Materials, ICM11
CountryItaly
CityComo
Period11/6/511/6/9

Fingerprint

Tensile strength
Fatigue of materials
Thin films
Plating
MEMS
Film thickness
Bone
Elastic moduli
Mechanical properties
Air
Temperature
Fatigue strength

Keywords

  • Fatigue high test
  • Fatigue properties
  • NiCo thin film
  • Tensile properties
  • Tensile test

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Park, J. H., Chun, Y. B., Kim, Y-J., Huh, Y. H., & Kang, D. J. (2011). Tensile and high cycle fatigue tests of NiCo thin films. In Procedia Engineering (Vol. 10, pp. 1303-1308) https://doi.org/10.1016/j.proeng.2011.04.217

Tensile and high cycle fatigue tests of NiCo thin films. / Park, Jun Hyub; Chun, Yun Bae; Kim, Yun-Jae; Huh, Yong Hak; Kang, Dong Joong.

Procedia Engineering. Vol. 10 2011. p. 1303-1308.

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

Park, JH, Chun, YB, Kim, Y-J, Huh, YH & Kang, DJ 2011, Tensile and high cycle fatigue tests of NiCo thin films. in Procedia Engineering. vol. 10, pp. 1303-1308, 11th International Conference on the Mechanical Behavior of Materials, ICM11, Como, Italy, 11/6/5. https://doi.org/10.1016/j.proeng.2011.04.217
Park JH, Chun YB, Kim Y-J, Huh YH, Kang DJ. Tensile and high cycle fatigue tests of NiCo thin films. In Procedia Engineering. Vol. 10. 2011. p. 1303-1308 https://doi.org/10.1016/j.proeng.2011.04.217
Park, Jun Hyub ; Chun, Yun Bae ; Kim, Yun-Jae ; Huh, Yong Hak ; Kang, Dong Joong. / Tensile and high cycle fatigue tests of NiCo thin films. Procedia Engineering. Vol. 10 2011. pp. 1303-1308
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