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Title: The mechanisms of ductile rupture

Abstract

One of the most confounding controversies in the ductile fracture community is the large discrepancy between predicted and experimentally observed strain-to-failure values during shear-dominant loading. Currently presented solutions focus on better accounting for how the deviatoric stress state influences void growth or on measuring strain at the microscale rather than the macroscale. While these approaches are useful, they do not address a significant aspect of the problem: the only rupture micromechanisms that are generally considered are void nucleation, growth, and coalescence (for tensile-dominated loading), and shear-localization and void coalescence (for shear-dominated loading). Current phenomenological models have thus focused on predicting the competition between these mechanisms based on the stress state and the strain-hardening capacity of the material. However, in the present study, we demonstrate that there are at least five other failure mechanisms. Because these have long been ignored, little is known about how all seven mechanisms interact with one another or the factors that control their competition. These questions are addressed by characterizing the fracture process in three high-purity face-centered cubic (FCC) metals of medium-to-high stacking fault energy: copper, nickel, and aluminum. These data demonstrate that, for a given stress state and material, several mechanisms frequently work together inmore » a sequential manner to cause fracture. The selection of a failure mechanism is significantly affected by the plasticity-induced microstructural evolution that occurs before tearing begins, which can create or eliminate sites for void nucleation. At the macroscale, failure mechanisms that do not involve cracking or pore growth were observed to facilitate subsequent void growth and coalescence processes. Even though the focus of this study is on damage accumulation in pure metals, these results are also applicable to understanding failure in engineering alloys.« less

Authors:
 [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1524207
Report Number(s):
SAND-2018-5461J
Journal ID: ISSN 1359-6454; 663415
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 161; Journal Issue: C; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Ductile fracture; Damage nucleation; Failure mechanism; Strain localization; Shear

Citation Formats

Noell, Philip J., Carroll, Jay D., and Boyce, Brad L. The mechanisms of ductile rupture. United States: N. p., 2018. Web. doi:10.1016/j.actamat.2018.09.006.
Noell, Philip J., Carroll, Jay D., & Boyce, Brad L. The mechanisms of ductile rupture. United States. https://doi.org/10.1016/j.actamat.2018.09.006
Noell, Philip J., Carroll, Jay D., and Boyce, Brad L. Thu . "The mechanisms of ductile rupture". United States. https://doi.org/10.1016/j.actamat.2018.09.006. https://www.osti.gov/servlets/purl/1524207.
@article{osti_1524207,
title = {The mechanisms of ductile rupture},
author = {Noell, Philip J. and Carroll, Jay D. and Boyce, Brad L.},
abstractNote = {One of the most confounding controversies in the ductile fracture community is the large discrepancy between predicted and experimentally observed strain-to-failure values during shear-dominant loading. Currently presented solutions focus on better accounting for how the deviatoric stress state influences void growth or on measuring strain at the microscale rather than the macroscale. While these approaches are useful, they do not address a significant aspect of the problem: the only rupture micromechanisms that are generally considered are void nucleation, growth, and coalescence (for tensile-dominated loading), and shear-localization and void coalescence (for shear-dominated loading). Current phenomenological models have thus focused on predicting the competition between these mechanisms based on the stress state and the strain-hardening capacity of the material. However, in the present study, we demonstrate that there are at least five other failure mechanisms. Because these have long been ignored, little is known about how all seven mechanisms interact with one another or the factors that control their competition. These questions are addressed by characterizing the fracture process in three high-purity face-centered cubic (FCC) metals of medium-to-high stacking fault energy: copper, nickel, and aluminum. These data demonstrate that, for a given stress state and material, several mechanisms frequently work together in a sequential manner to cause fracture. The selection of a failure mechanism is significantly affected by the plasticity-induced microstructural evolution that occurs before tearing begins, which can create or eliminate sites for void nucleation. At the macroscale, failure mechanisms that do not involve cracking or pore growth were observed to facilitate subsequent void growth and coalescence processes. Even though the focus of this study is on damage accumulation in pure metals, these results are also applicable to understanding failure in engineering alloys.},
doi = {10.1016/j.actamat.2018.09.006},
journal = {Acta Materialia},
number = C,
volume = 161,
place = {United States},
year = {2018},
month = {9}
}

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Works referenced in this record:

The Bending Stress Distribution at the Base of a Stationary Crack
journal, March 1961

  • Williams, M. L.
  • Journal of Applied Mechanics, Vol. 28, Issue 1
  • DOI: 10.1115/1.3640470

Plane strain deformation near a crack tip in a power-law hardening material
journal, January 1968


The Sandia Fracture Challenge: blind round robin predictions of ductile tearing
journal, January 2014

  • Boyce, B. L.; Kramer, S. L. B.; Fang, H. E.
  • International Journal of Fracture, Vol. 186, Issue 1-2
  • DOI: 10.1007/s10704-013-9904-6

The second Sandia Fracture Challenge: predictions of ductile failure under quasi-static and moderate-rate dynamic loading
journal, March 2016

  • Boyce, B. L.; Kramer, S. L. B.; Bosiljevac, T. R.
  • International Journal of Fracture, Vol. 198, Issue 1-2
  • DOI: 10.1007/s10704-016-0089-7

On the ductile enlargement of voids in triaxial stress fields∗
journal, June 1969


Continuum Theory of Ductile Rupture by Void Nucleation and Growth: Part I—Yield Criteria and Flow Rules for Porous Ductile Media
journal, January 1977

  • Gurson, A. L.
  • Journal of Engineering Materials and Technology, Vol. 99, Issue 1
  • DOI: 10.1115/1.3443401

Shear band formation in plane strain
journal, January 1981


Material failure by void coalescence in localized shear bands
journal, January 1982


Analysis of the cup-cone fracture in a round tensile bar
journal, January 1984


Two mechanisms of ductile fracture: void by void growth versus multiple void interaction
journal, June 2002


On fracture locus in the equivalent strain and stress triaxiality space
journal, January 2004


Rupture mechanisms in combined tension and shear—Micromechanics
journal, August 2007


A Criterion for Ductile Fracture by the Growth of Holes
journal, June 1968

  • McClintock, F. A.
  • Journal of Applied Mechanics, Vol. 35, Issue 2
  • DOI: 10.1115/1.3601204

On the mechanisms of ductile failure in high-strength steels subjected to multi-axial stress-states
journal, June 1976


Fracture characteristics of three metals subjected to various strains, strain rates, temperatures and pressures
journal, January 1985


Rupture mechanisms in combined tension and shear—Experiments
journal, March 2007


Partially coupled anisotropic fracture model for aluminum sheets
journal, May 2010


Ductile fracture: Experiments and computations
journal, February 2011


Modification of the Gurson Model for shear failure
journal, January 2008


Calibration and evaluation of seven fracture models
journal, April 2005

  • Wierzbicki, Tomasz; Bao, Yingbin; Lee, Young-Woong
  • International Journal of Mechanical Sciences, Vol. 47, Issue 4-5
  • DOI: 10.1016/j.ijmecsci.2005.03.003

Micromechanical analysis on the influence of the Lode parameter on void growth and coalescence
journal, March 2011


Extension of a shear-controlled ductile fracture model considering the stress triaxiality and the Lode parameter
journal, January 2013


Phase-field modeling of ductile fracture
journal, April 2015


Evaluation of six fracture models in high velocity perforation
journal, August 2006


Overview No. 1
journal, January 1979


Criteria for ductile fracture and their applications
journal, April 1980


A complete Gurson model approach for ductile fracture
journal, September 2000


New ductile fracture criterion for prediction of fracture forming limit diagrams of sheet metals
journal, December 2012


Ductile failure behavior of polycrystalline Al 6061-T6
journal, March 2012


Ductile failure behavior of polycrystalline Al 6061-T6 under shear dominant loading
journal, January 2013


Ductile failure under combined shear and tension
journal, May 2013

  • Haltom, S. S.; Kyriakides, S.; Ravi-Chandar, K.
  • International Journal of Solids and Structures, Vol. 50, Issue 10
  • DOI: 10.1016/j.ijsolstr.2012.12.009

On the deformation and failure of Al 6061-T6 at low triaxiality evaluated through in situ microscopy
journal, February 2016


Ductile failure of aluminum alloy tubes under combined torsion and tension
journal, October 2016


In situ 3-D observation of early strain localization during failure of thin Al alloy (2198) sheet
journal, May 2014


Failure of metals I: Brittle and ductile fracture
journal, April 2016


An investigation of the plastic fracture of AISI 4340 and 18 Nickel-200 grade maraging steels
journal, June 1974

  • Cox, T. B.; Low, J. R.
  • Metallurgical Transactions, Vol. 5, Issue 6
  • DOI: 10.1007/BF02646633

Fracture and strength of solids
journal, January 1949


Compressive Properties of ⟨110⟩ Cu Micro-Pillars after High-Dose Self-Ion Irradiation
journal, November 2013


The influence of hydrostatic pressure on the fracture mechanisms of sheet tensile specimens of copper and brass
journal, April 1976


Ductile fracture in metals
journal, August 1959


The effect of hydrostatic pressure on the tensile fracture of α-brass
journal, November 1973


The influence of hydrostatic pressure on the tensile deformation and fracture of copper
journal, April 1975

  • French, Ian E.; Weinrich, Paul F.
  • Metallurgical Transactions A, Vol. 6, Issue 4
  • DOI: 10.1007/BF02672300

The effects of hydrostatic pressure on the mechanism of tensile fracture of aluminum
journal, June 1975

  • French, I. E.; Weinrich, P. F.
  • Metallurgical Transactions A, Vol. 6, Issue 6
  • DOI: 10.1007/BF02658524

The shear mode of ductile fracture in commercial copper
journal, November 1977


The influence of iron content on the plane strain fracture behaviour of AA 5754 Al–Mg sheet alloys
journal, February 2002


Ductile failure in polycrystalline OFHC copper
journal, December 2011


The fracture of metals
journal, January 1963


On localization and void coalescence as a precursor to ductile fracture
journal, March 2015

  • Tekoğlu, C.; Hutchinson, J. W.; Pardoen, T.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 373, Issue 2038
  • DOI: 10.1098/rsta.2014.0121

Restoration mechanisms in large-strain deformation of high purity aluminum at ambient temperature and the determination of the existence of “steady-state”
journal, September 1994


Room temperature recrystallization of 99.999 pct aluminum
journal, February 1994


Dynamic recrystallization in high purity aluminum
journal, December 1997


The role of heterogeneous deformation on damage nucleation at grain boundaries in single phase metals
journal, September 2009


Do voids nucleate at grain boundaries during ductile rupture?
journal, September 2017


An experimental methodology to relate local strain to microstructural texture
journal, August 2010

  • Carroll, J.; Abuzaid, W.; Lambros, J.
  • Review of Scientific Instruments, Vol. 81, Issue 8
  • DOI: 10.1063/1.3474902

Full-field 3D measurement using multi-camera digital image correlation system
journal, September 2013


Slant strained band development during flat to slant crack transition in AA 2198 T8 sheet: in situ 3D measurements
journal, November 2015

  • Buljac, Ante; Taillandier-Thomas, Thibault; Morgeneyer, Thilo F.
  • International Journal of Fracture, Vol. 200, Issue 1-2
  • DOI: 10.1007/s10704-015-0052-z

New discoveries in deformed metals
journal, December 2001

  • Hansen, Niels; Mehl, Robert F.; Medalist, Award
  • Metallurgical and Materials Transactions A, Vol. 32, Issue 12
  • DOI: 10.1007/s11661-001-0167-x

Fracture mechanism maps in stress space
journal, May 1988


Experimental investigation of void coalescence in metallic sheets containing laser drilled holes
journal, May 2008


Observation of void nucleation, growth and coalescence in a model metal matrix composite using X-ray tomography
journal, August 2008


Onset of void coalescence in uniaxial tension studied by continuous X-ray tomography
journal, February 2013


Low energy dislocation structures associated with cracks in ductile fracture
journal, August 1986


A model of ductile fracture based on the nucleation and growth of voids
journal, August 1981


Anisotropic ductile fracture
journal, September 2004


Works referencing / citing this record:

Influence of Ti on the Tensile Properties of the High-Strength Powder Metallurgy High Entropy Alloys
journal, January 2020

  • Moravcik, Igor; Gamanov, Stepan; Moravcikova-Gouvea, Larissa
  • Materials, Vol. 13, Issue 3
  • DOI: 10.3390/ma13030578

Fatigue failure monitoring of 316L stainless steel coupons using optical fibre based distributed strain sensing
journal, September 2019

  • De Pauw, Ben; Hinderdael, Michaël; Moonens, Marc
  • Smart Materials and Structures, Vol. 28, Issue 10
  • DOI: 10.1088/1361-665x/ab32cd