Fatigue and corrosion of a Pd-based bulk metallic glass in various environments

Bulk metallic glasses (BMGs) possess attractive properties for biomedical applications, including high strength, hardness and corrosion resistance, and low elastic modulus. In this study, we conduct rotating beam fatigue tests on Pd43Ni10Cu27P20 bulk metallic glass in air and Eagle's medium (EM...

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Bibliographic Details
Published in:Materials Science & Engineering C 2013-10, Vol.33 (7), p.4021-4025
Main Authors: Watanabe, L.Y., Roberts, S.N., Baca, N., Wiest, A., Garrett, S.J., Conner, R.D.
Format: Article
Language:English
Subjects:
Alloys - chemistry
Bulk amorphous alloys
Calorimetry, Differential Scanning
Corrosion
Crystallization
Fatigue
Glass - chemistry
Immersion
Materials Testing
Mechanical characterization
Palladium - chemistry
Spectrophotometry, Atomic
Stress, Mechanical
Temperature
X-Ray Diffraction
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Summary:Bulk metallic glasses (BMGs) possess attractive properties for biomedical applications, including high strength, hardness and corrosion resistance, and low elastic modulus. In this study, we conduct rotating beam fatigue tests on Pd43Ni10Cu27P20 bulk metallic glass in air and Eagle's medium (EM) and measure the corrosive resistance of the alloy by submersion in acidic and basic electrolytes. Fatigue results are compared to those of commonly used biometals in EM. Rotating beam fatigue tests conducted in air and in Eagle's medium show no deterioration in fatigue properties in this potentially corrosive environment out to 107 cycles. A specimen size effect is revealed when comparing fatigue results to those of a similar alloy of larger minimum dimensions. Corrosion tests show that the alloy is not affected by highly basic (NaOH) or saline (NaCl) solutions, nor in EM, and is affected by chlorinated acidic solutions (HCl) to a lesser extent than other commonly used biometals. Corrosion in HCl initiates with selective leaching of late transition metals, followed by dissolution of Pd. •Fatigue limit of 600MPa with no deterioration when exposed to Eagle's medium.•Fatigue shows sample size effect.•Pd-based BMG is unaffected by saline or strong basic solutions.•Pd-based BMG is substantially more resistant to chlorinated acids than CoCrMo, 316L Stainless, or Ti6Al4V alloys.•Corrosion shows selective leaching of late transition metals, followed by Pd and P.
ISSN:0928-4931
1873-0191
DOI:10.1016/j.msec.2013.05.044