Fatigue stress concentration and notch sensitivity in nanocrystalline metals

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

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.  https://doi.org/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.  https://doi.org/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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Works referencing / citing this record:

Bending strength and notched-sample fatigue life of hBN/TiC-reinforced steel 316 L: A numerical and experimental analysis
journal, September 2019

Sadooghi, Ali; Payganeh, Gholamhassan; Tajdari, Mahdi
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Cumulative shear strain–induced preferential orientation during abnormal grain growth near fatigue crack tips of nanocrystalline Au films
journal, January 2020

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Journal of Materials Research, Vol. 35, Issue 4
DOI: 10.1557/jmr.2019.409

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Title: Fatigue stress concentration and notch sensitivity in nanocrystalline metals

Abstract

Citation Formats

Effect of microstructural stability on fatigue crack growth behaviour of nanostructured Cu journal, December 2013

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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In-situ TEM tensile testing of DC magnetron sputtered and pulsed laser deposited Ni thin films journal, April 2003

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On characteristic lengths used in notch fracture mechanics journal, January 2014

Anomalous Fatigue Behavior and Fatigue-Induced Grain Growth in Nanocrystalline Nickel Alloys journal, May 2011

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Grain size effects on the fatigue response of nanocrystalline metals journal, October 2003

Fatigue behavior of nanocrystalline metals and alloys journal, October 2005

A mechanism of grain growth-assisted intergranular fatigue fracture in electrodeposited nanocrystalline nickel–phosphorus alloy journal, June 2015

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

Fatigue notch sensitivity of ultrafine-grained copper journal, January 2005

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

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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
journal, April 2015

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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Stress Concentration Factors
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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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Fatigue of nanocrystalline copper
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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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A Review of Fatigue Behavior in Nanocrystalline Metals
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Roles of grain boundary microstructure in high-cycle fatigue of electrodeposited nanocrystalline Ni–P alloy
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Fatigue limit of notched bodies
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Fatigue notch sensitivity and the notch size effect
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In-situ TEM tensile testing of DC magnetron sputtered and pulsed laser deposited Ni thin films
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Fatigue properties and crack behavior of ultra-fine and nanocrystalline pure metals
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Structure and Mechanical Properties of Electrodeposited Nanocrystalline Ni-Fe Alloys
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The Formation and Growth of Pits in Electrodeposited Metals
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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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Microstructure versus Flaw: Mechanisms of Failure and Strength in Nanostructures
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Fatigue Insensitivity of Nanoscale Freestanding Aluminum Films
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Grain size effects on the fatigue response of nanocrystalline metals
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