Fatigue stress concentration and notch sensitivity in nanocrystalline metals

doi:10.1557/jmr.2016.66

Title: Fatigue stress concentration and notch sensitivity in nanocrystalline metals

Abstract

Recent studies have shown the potential for nanocrystalline metals to possess excellent fatigue resistance compared to their coarse-grained counterparts. Although the mechanical properties of nanocrystalline metals are believed to be particularly susceptible to material defects, a systematic study of the effects of geometric discontinuities on their fatigue performance has not yet been performed. In the present work, nanocrystalline Ni–40 wt%Fe containing both intrinsic and extrinsic defects were tested in tension–tension fatigue. The defects were found to dramatically reduce the fatigue resistance, which was attributed to the relatively high notch sensitivity in the nanocrystalline material. Microstructural analysis within the crack-initiation zones underneath the defects revealed cyclically-induced abnormal grain growth (AGG) as a predominant deformation and crack initiation mechanism during high-cycle fatigue. Furthermore, the onset of AGG and the ensuing fracture is likely accelerated by the stress concentrations, resulting in the reduced fatigue resistance compared to the relatively defect-free counterparts.

Authors:

Furnish, Timothy A. ^[1]; Boyce, Brad L. ^[1]; Sharon, John A. ^[1]; O’Brien, Christopher J. ^[1]; Clark, Blythe G. ^[1]; Arrington, Christian L. ^[1]; Pillars, Jamin R. ^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Publication Date:: 2016-03-11

Research Org.:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1254322

Report Number(s):: SAND-2015-6744J
Journal ID: ISSN 0884-2914; applab; PII: S0884291416000662

Grant/Contract Number:: AC04-94AL85000

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Materials Research

Additional Journal Information:: Journal Volume: 31; Journal Issue: 06; Journal ID: ISSN 0884-2914

Publisher:: Materials Research Society

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; fatigue; nanocrystalline; defects; notches; fracture

Citation Formats


                    Furnish, Timothy A., Boyce, Brad L., Sharon, John A., O’Brien, Christopher J., Clark, Blythe G., Arrington, Christian L., and Pillars, Jamin R. Fatigue stress concentration and notch sensitivity in nanocrystalline metals.  United States: N. p., 2016. 
        Web.  doi:10.1557/jmr.2016.66.

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                    Furnish, Timothy A., Boyce, Brad L., Sharon, John A., O’Brien, Christopher J., Clark, Blythe G., Arrington, Christian L., & Pillars, Jamin R. Fatigue stress concentration and notch sensitivity in nanocrystalline metals.  United States.  doi:10.1557/jmr.2016.66.

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                    Furnish, Timothy A., Boyce, Brad L., Sharon, John A., O’Brien, Christopher J., Clark, Blythe G., Arrington, Christian L., and Pillars, Jamin R. Fri .  
        "Fatigue stress concentration and notch sensitivity in nanocrystalline metals".  United States.  doi:10.1557/jmr.2016.66.  https://www.osti.gov/servlets/purl/1254322.

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@article{osti_1254322,

  title        = {Fatigue stress concentration and notch sensitivity in nanocrystalline metals},

  author       = {Furnish, Timothy A. and Boyce, Brad L. and Sharon, John A. and O’Brien, Christopher J. and Clark, Blythe G. and Arrington, Christian L. and Pillars, Jamin R.},

  abstractNote = {Recent studies have shown the potential for nanocrystalline metals to possess excellent fatigue resistance compared to their coarse-grained counterparts. Although the mechanical properties of nanocrystalline metals are believed to be particularly susceptible to material defects, a systematic study of the effects of geometric discontinuities on their fatigue performance has not yet been performed. In the present work, nanocrystalline Ni–40 wt%Fe containing both intrinsic and extrinsic defects were tested in tension–tension fatigue. The defects were found to dramatically reduce the fatigue resistance, which was attributed to the relatively high notch sensitivity in the nanocrystalline material. Microstructural analysis within the crack-initiation zones underneath the defects revealed cyclically-induced abnormal grain growth (AGG) as a predominant deformation and crack initiation mechanism during high-cycle fatigue. Furthermore, the onset of AGG and the ensuing fracture is likely accelerated by the stress concentrations, resulting in the reduced fatigue resistance compared to the relatively defect-free counterparts.},

  doi          = {10.1557/jmr.2016.66},

  journal      = {Journal of Materials Research},

  number       = 06,

  volume       = 31,

  place        = {United States},

  year         = {2016},

  month        = {3}

}

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DOI: 10.1557/jmr.2016.66

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Works referencing / citing this record:

A brief overview on grain growth of bulk electrodeposited nanocrystalline nickel and nickel-iron alloys
journal, January 2019

Ni, Haitao; Zhu, Jiang; Wang, Zhaodong
REVIEWS ON ADVANCED MATERIALS SCIENCE, Vol. 58, Issue 1
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A brief overview on grain growth of bulk electrodeposited nanocrystalline nickel and nickel-iron alloys
journal, January 2019

Ni, Haitao; Zhu, Jiang; Wang, Zhaodong
REVIEWS ON ADVANCED MATERIALS SCIENCE, Vol. 58, Issue 1
DOI: 10.1515/rams-2019-0011

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Title: Fatigue stress concentration and notch sensitivity in nanocrystalline metals

Abstract

Citation Formats

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Direct numerical simulations in solid mechanics for understanding the macroscale effects of microscale material variability journal, April 2015

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The strength of nanocrystalline metals with and without flaws journal, August 1997

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A Review of Fatigue Behavior in Nanocrystalline Metals journal, October 2009

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Interpreting the ductility of nanocrystalline metals 1 journal, May 2013

Fatigue notch sensitivity and the notch size effect journal, December 2008

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Fatigue properties and crack behavior of ultra-fine and nanocrystalline pure metals journal, October 2009

Structure and Mechanical Properties of Electrodeposited Nanocrystalline Ni-Fe Alloys journal, January 2013

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Electrodeposition and electro-catalytic study of nanocrystalline Ni–Fe alloy journal, July 2014

Crystal plasticity simulations of microstructure-induced uncertainty in strain concentration near voids in brass journal, February 2015

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The effects of grain size and porosity on the elastic modulus of nanocrystalline materials journal, May 1999

Cyclic strain hardening of nanocrystalline nickel journal, March 2006

Uncommon Deformation Mechanisms during Fatigue-Crack Propagation in Nanocrystalline Alloys journal, March 2013

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Effect of microstructural stability on fatigue crack growth behaviour of nanostructured Cu
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Direct numerical simulations in solid mechanics for understanding the macroscale effects of microscale material variability
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Cyclic creep and fatigue testing of nanocrystalline copper thin films
journal, January 2013

Mechanical properties of nanocrystalline materials
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Influence of electrical discharged machining and surface defects on the fatigue strength of electrodeposited nanocrystalline Ni
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Is Stress Concentration Relevant for Nanocrystalline Metals?
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Notch size effects on high cycle fatigue limit stress of Udimet 720
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Probabilistic framework for a microstructure-sensitive fatigue notch factor
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The strength of nanocrystalline metals with and without flaws
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Quantitative in situ TEM tensile fatigue testing on nanocrystalline metallic ultrathin films
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Fatigue and Fracture of a Bulk Nanocrystalline NiFe Alloy
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Roles of grain boundary microstructure in high-cycle fatigue of electrodeposited nanocrystalline Ni–P alloy
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The influence of grain size and texture on the Young's modulus of nanocrystalline nickel and nickel–iron alloys
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On characteristic lengths used in notch fracture mechanics
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Anomalous Fatigue Behavior and Fatigue-Induced Grain Growth in Nanocrystalline Nickel Alloys
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Quantitative tracking of grain structure evolution in a nanocrystalline metal during cyclic loading
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Fatigue-induced grain coarsening in nanocrystalline platinum films
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Microstructure versus Flaw: Mechanisms of Failure and Strength in Nanostructures
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Grain size effects on the fatigue response of nanocrystalline metals
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A mechanism of grain growth-assisted intergranular fatigue fracture in electrodeposited nanocrystalline nickel–phosphorus alloy
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