A Highly Fatigue-Resistant Zr-Based Bulk Metallic Glass Public Deposited

http://ir.library.oregonstate.edu/concern/articles/cr56n296r

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  • The strength-normalized fatigue endurance strength of the bulk metallic glass (BMG) Zr₅₂.₅Cu₁₇.₉Ni₁₄.₆Al₁₀Ti₅ (Vitreloy 105) has been reported to be the highest for any BMG; however, to date, there has been no explanation of why this material is so much better than other Zr-based compositions. In this study, the fatigue-crack growth behavior of Zr₅₂.₅Cu₁₇.₉Ni₁₄.₆Al₁₀Ti₅ was compared in ambient air vs dry nitrogen environment. The excellent fatigue life behavior is attributed to a relatively high fatigue threshold (𝚫Kₜₕ ≈ 2 MPa√m) and a lack of sensitivity to environmental effects on fatigue-crack growth in ambient air, as compared to other Zr-based BMGs. Fatigue life experiments conducted in ambient air confirmed the excellent fatigue life properties with a 10⁷-cycle endurance strength of ~0.24 of the ultimate tensile strength; however, it was also found that casting porosity, even in limited amounts, could reduce this endurance strength by as much as ~60 pct. Overall, the BMG Zr₅₂.₅Cu₁₇.₉Ni₁₄.₆Al₁₀Ti₅ appears to have excellent strength and fatigue properties and should be considered as a prime candidate material for future applications where good mechanical fatigue resistance is required.
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  • Naleway, S. E., Greene, R. B., Gludovatz, B., Dave, N. K., Ritchie, R. O., & Kruzic, J. J. (2013). A Highly Fatigue-Resistant Zr-Based Bulk Metallic Glass. Metallurgical and Materials Transactions A, 44A(13), 5688-5693. doi:10.1007/s11661-013-1923-4
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  • description.provenance : Approved for entry into archive by Erin Clark(erin.clark@oregonstate.edu) on 2014-03-18T18:35:16Z (GMT) No. of bitstreams: 1NalewayStevenMechanicalIndustrialManufacturingEngineeringHighlyFatigue-Resistant.pdf: 468070 bytes, checksum: 50faa7c138d98adb98b317a0bb5eb438 (MD5)
  • description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2014-03-18T18:32:00ZNo. of bitstreams: 1NalewayStevenMechanicalIndustrialManufacturingEngineeringHighlyFatigue-Resistant.pdf: 468070 bytes, checksum: 50faa7c138d98adb98b317a0bb5eb438 (MD5)
  • This paper was published in Metallurgical and Materials Transactions A, Vol. 44A, Issue 13, pp. 5688-5693 and is made available as an electronic reprint with the permission of ASM International. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplications of any material in this paper for a fee or for commercial purposes, or modification of the content of this paper are prohibited. This is the publisher’s final pdf.
  • description.provenance : Made available in DSpace on 2014-03-18T18:35:16Z (GMT). No. of bitstreams: 1NalewayStevenMechanicalIndustrialManufacturingEngineeringHighlyFatigue-Resistant.pdf: 468070 bytes, checksum: 50faa7c138d98adb98b317a0bb5eb438 (MD5) Previous issue date: 2013-12

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