Corrosion-fatigue study of a Zr-based bulk-metallic glass in a physiologically relevant environment

Huang, Lu; Wang, Gongyao; Qiao, Dongchun; Liaw, Peter K.; Pang, Shujie; Wang, Jianfeng; Zhang, Tao

doi:10.1016/j.jallcom.2010.02.080

Cited by 24 publications

(18 citation statements)

References 12 publications

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“…5. In general, the shape of the S-N curve of the Al 0.5 CoCrCuFeNi HEA is similar to those for other crystalline metals and amorphous metals [27][28][29][30][31][32][33]. The S-N curve shows a distinct endurance limit of 383 ± 71 MPa, which is below the yield strength of this alloy (1284 MPa [2]), and the fatigue ratio of the fatigue limit to tensile strength (1344 MPa [2]) is about 0.29.…”

Section: S-n Curves Of Four-point-bending Fatiguesupporting

confidence: 67%

Fatigue behavior of a wrought Al0.5CoCrCuFeNi two-phase high-entropy alloy

et al. 2015

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a b s t r a c tFatigue behavior of a cold-rolled two-phase Al 0.5 CoCrCuFeNi high-entropy alloy (HEA) was studied. Some specimens were fabricated, using commercial-purity raw materials, while others were manufactured with high-purity components. Scatter in the fatigue life of the commercial-purity samples was found in the stress vs. lifetime plot (S-N curve). However, the high-purity samples showed less scatter, and fatigue life is predictable using fatigue statistics. The fatigue property of the alloy is comparable with and may even outperform many commercial alloys. Fatigue cracking is promoted by shrinkage pores with a size of $5 lm, while mechanical nanotwinning was found to be the main deformation mechanism before crack-initiation and during crack propagation by transmission electron microscopy (TEM). Two orientations of dense nanotwins were found at the crack-initiation site, while less-dense nanotwins were found away from the crack initiation site. The nanotwinning behavior resulted in strengthening of the alloy and, consequently, high fatigue strength (383 ± 71 MPa). Moreover, statistical models were applied to predict fatigue life, suggesting that using improved fabrication processes and/or high-purity raw materials may enhance the fatigue behavior and scatter by reducing the number of fabrication microcracks and pores in the test samples.Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

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Section: S-n Curves Of Four-point-bending Fatiguesupporting

confidence: 67%

Fatigue behavior of a wrought Al0.5CoCrCuFeNi two-phase high-entropy alloy

et al. 2015

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“…The enhanced corrosion resistance of the ZrAlFeCu BMG coupled with its high fatigue strength in air found in this study served as indications to its potential resistance to the deleterious corrosion fatigue effect imposed by the aggressive body environment. It has been previously demonstrated that the fatigue lives of Zr-based BMGs have been greatly reduced when immersing in corrosive solutions [50][51][52]. In our previous research, the fatigue endurance limit of a Zr-Al-Ni-Cu BMG under four-point-bend fatigue was found to be reduced from 450 MPa in air to 270 MPa in PBS solution at 37°C [50].…”

Section: Corrosion and Surface Properties Of The Zr-based Bmgmentioning

confidence: 84%

“…It has been previously demonstrated that the fatigue lives of Zr-based BMGs have been greatly reduced when immersing in corrosive solutions [50][51][52]. In our previous research, the fatigue endurance limit of a Zr-Al-Ni-Cu BMG under four-point-bend fatigue was found to be reduced from 450 MPa in air to 270 MPa in PBS solution at 37°C [50]. The underlying degradation mechanism was related to the anodic dissolution induced corrosion pits, which acted as crack initiation sites at low stress levels [50,51].…”

Section: Corrosion and Surface Properties Of The Zr-based Bmgmentioning

confidence: 99%

A Zr-based bulk metallic glass for future stent applications: Materials properties, finite element modeling, and in vitro human vascular cell response

et al. 2015

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Vascular stents are medical devices typically used to restore the lumen of narrowed or clogged blood vessel. Despite the clinical success of metallic materials in stent-assisted angioplasty, post-surgery complications persist due to the mechanical failures, corrosion, and in-stent restenosis of current stents. To overcome these hurdles, strategies including new designs and surface functionalization have been exercised. In addition, the development of new materials with higher performance and biocompatibility can intrinsically reduce stent failure rates. The present study demonstrates the advantages of a novel material, named bulk metallic glass (BMG), over the benchmarked 316L stainless steel through experimental methods and computational simulations. It raises the curtain of new research endeavors on BMGs as competitive alternatives for stent applications.

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“…Most work related to environmentally induced cracking of Zr-based BMGs was done on hydrogen effects (e.g., [44][45][46][47][48][49][50][51][52]) and on corrosion fatigue [53][54][55][56][57][58][59][60]. Studies on stress corrosion cracking of Zr-based BMGs are rather scarce [9,10,13,53,61].…”

Section: Environmentally Induced Crackingmentioning

confidence: 99%

“…The latter explains their poor corrosion fatigue performance. Huang et al [60] prepared Zr55Cu30Al10Ni5 + 1 at. % Y rectangular glass samples (3 × 3 × 25 mm 3 ) for 4-point-bending in an artificial body fluid.…”

Section: Corrosion Fatiguementioning

confidence: 99%

Stress-Corrosion Interactions in Zr-Based Bulk Metallic Glasses

Gostin

Eigel

Grell

et al. 2015

Metals

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Stress-corrosion interactions in materials may lead to early unpredictable catastrophic failure of structural parts, which can have dramatic effects. In Zr-based bulk metallic glasses, such interactions are particularly important as these have very high yield strength, limited ductility, and are relatively susceptible to localized corrosion in halide-containing aqueous environments. Relevant features of the mechanical and corrosion behavior of Zr-based bulk metallic glasses are described, and an account of knowledge regarding corrosion-deformation interactions gathered from ex situ experimental procedures is provided. Subsequently the literature on key phenomena including hydrogen damage, stress corrosion cracking, and corrosion fatigue is reviewed. Critical factors for such phenomena will be highlighted. The review also presents an outlook for the topic.

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Corrosion-fatigue study of a Zr-based bulk-metallic glass in a physiologically relevant environment

Cited by 24 publications

References 12 publications

Fatigue behavior of a wrought Al0.5CoCrCuFeNi two-phase high-entropy alloy

Fatigue behavior of a wrought Al0.5CoCrCuFeNi two-phase high-entropy alloy

A Zr-based bulk metallic glass for future stent applications: Materials properties, finite element modeling, and in vitro human vascular cell response

Stress-Corrosion Interactions in Zr-Based Bulk Metallic Glasses

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