Unraveling cyclic deformation mechanisms of a rolled magnesium alloy using in situ neutron diffraction

Wu, Wei; An, Ke; Liaw, Peter K.

doi:10.1016/j.actamat.2014.11.030

Title: Unraveling cyclic deformation mechanisms of a rolled magnesium alloy using in situ neutron diffraction

Abstract

In the current study, the deformation mechanisms of a rolled magnesium alloy were investigated under cyclic loading using real-time in situ neutron diffraction under a continuous-loading condition. The relationship between the macroscopic cyclic deformation behavior and the microscopic response at the grain level was established. The neutron diffraction results indicate that more and more grains are involved in the twinning and detwinning deformation process with the increase of fatigue cycles. The residual twins appear in the early fatigue life, which is responsible for the cyclic hardening behavior. The asymmetric shape of the hysteresis loop is attributed to the early exhaustion of the detwinning process during compression, which leads to the activation of dislocation slips and rapid strain-hardening. The critical resolved shear stress for the activation of tensile twinning closely depends on the residual strain developed during cyclic loading. In the cycle before the sample fractured, the dislocation slips became active in tension, although the sample was not fully twinned. The increased dislocation density leads to the rise of the stress concentration at weak spots, which is believed to be the main reason for the fatigue failure. Furthermore, the deformation history greatly influences the deformation mechanisms of hexagonal-close-packed-structured magnesium alloy duringmore » cyclic loading.« less

Authors:

Wu, Wei ^[1]; An, Ke ^[1]; Liaw, Peter K. ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States)

Publication Date:: Tue Dec 23 00:00:00 EST 2014

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Fossil Energy and Carbon Management (FECM)

OSTI Identifier:: 1185511

Alternate Identifier(s):: OSTI ID: 1259928

Grant/Contract Number:: AC05-00OR22725; FE-0008855; FE-001194

Resource Type:: Accepted Manuscript

Journal Name:: Acta Materialia

Additional Journal Information:: Journal Volume: 85; Journal ID: ISSN 1359-6454

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; magnesium alloy; cyclic loading; deformation mechanisms; neutron diffraction; twinning

Citation Formats


                    Wu, Wei, An, Ke, and Liaw, Peter K. Unraveling cyclic deformation mechanisms of a rolled magnesium alloy using in situ neutron diffraction.  United States: N. p., 2014. 
Web.  doi:10.1016/j.actamat.2014.11.030.

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                    Wu, Wei, An, Ke, & Liaw, Peter K. Unraveling cyclic deformation mechanisms of a rolled magnesium alloy using in situ neutron diffraction.  United States.  https://doi.org/10.1016/j.actamat.2014.11.030

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                    Wu, Wei, An, Ke, and Liaw, Peter K. Tue .  
"Unraveling cyclic deformation mechanisms of a rolled magnesium alloy using in situ neutron diffraction".  United States.  https://doi.org/10.1016/j.actamat.2014.11.030.  https://www.osti.gov/servlets/purl/1185511.

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@article{osti_1185511,

  title        = {Unraveling cyclic deformation mechanisms of a rolled magnesium alloy using in situ neutron diffraction},

  author       = {Wu, Wei and An, Ke and Liaw, Peter K.},

  abstractNote = {In the current study, the deformation mechanisms of a rolled magnesium alloy were investigated under cyclic loading using real-time in situ neutron diffraction under a continuous-loading condition. The relationship between the macroscopic cyclic deformation behavior and the microscopic response at the grain level was established. The neutron diffraction results indicate that more and more grains are involved in the twinning and detwinning deformation process with the increase of fatigue cycles. The residual twins appear in the early fatigue life, which is responsible for the cyclic hardening behavior. The asymmetric shape of the hysteresis loop is attributed to the early exhaustion of the detwinning process during compression, which leads to the activation of dislocation slips and rapid strain-hardening. The critical resolved shear stress for the activation of tensile twinning closely depends on the residual strain developed during cyclic loading. In the cycle before the sample fractured, the dislocation slips became active in tension, although the sample was not fully twinned. The increased dislocation density leads to the rise of the stress concentration at weak spots, which is believed to be the main reason for the fatigue failure. Furthermore, the deformation history greatly influences the deformation mechanisms of hexagonal-close-packed-structured magnesium alloy during cyclic loading.},

  doi          = {10.1016/j.actamat.2014.11.030},

  journal      = {Acta Materialia},

  number       = ,

  volume       = 85,

  place        = {United States},

  year         = {Tue Dec 23 00:00:00 EST 2014},

  month        = {Tue Dec 23 00:00:00 EST 2014}

}

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Bending Behavior of a Wrought Magnesium Alloy Investigated by the In Situ Pinhole Neutron Diffraction Method
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Title: Unraveling cyclic deformation mechanisms of a rolled magnesium alloy using in situ neutron diffraction

Abstract

Citation Formats

Magnesium alloys and applications journal, January 1994

Magnesium journal, April 2001

Preface to the viewpoint set on: The current state of magnesium alloy science and technology journal, October 2010

Fatigue of Magnesium Alloys journal, May 2004

Inverse surface macro-segregation in high-pressure die-cast AM60 magnesium alloy and its effects on fatigue behavior journal, May 2005

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Internal strain and texture evolution during deformation twinning in magnesium journal, June 2005

Hardening evolution of AZ31B Mg sheet journal, January 2007

Application of texture simulation to understanding mechanical behavior of Mg and solid solution alloys containing Li or Y journal, December 2001

Twinning and the ductility of magnesium alloys journal, August 2007

Study of slip mechanisms in a magnesium alloy by neutron diffraction and modeling journal, April 2003

Twinning–detwinning behavior during the strain-controlled low-cycle fatigue testing of a wrought magnesium alloy, ZK60A journal, February 2008

Internal stress relaxation and load redistribution during the twinning–detwinning-dominated cyclic deformation of a wrought magnesium alloy, ZK60A journal, August 2008

The role of twinning and untwinning in yielding behavior in hot-extruded Mg–Al–Zn alloy journal, February 2007

Deformation dynamics study of a wrought magnesium alloy by real-time in situ neutron diffraction journal, September 2013

Modeling the effect of twinning and detwinning during strain-path changes of magnesium alloy AZ31 journal, May 2009

Low-Cycle Fatigue Behavior of an As-Extruded AM50 Magnesium Alloy journal, May 2007

Effect of strain amplitude on tension–compression fatigue behavior of extruded Mg6Al1ZnA magnesium alloy journal, May 2010

Study on cyclic deformation behavior of extruded Mg–3Al–1Zn alloy journal, March 2012

Effects of hysteresis energy and mean stress on low-cycle fatigue behaviors of an extruded magnesium alloy journal, June 2011

An experimental study of cyclic deformation of extruded AZ61A magnesium alloy journal, May 2011

Effect of strain ratio on cyclic deformation and fatigue of extruded AZ61A magnesium alloy journal, November 2012

Effect of strain ratio and strain rate on low cycle fatigue behavior of AZ31 wrought magnesium alloy journal, August 2009

Microstructure and deformation mechanism of Mg6Al1ZnA alloy experienced tension–compression cyclic loading journal, February 2011

Cyclic behavior of extruded magnesium: Experimental, microstructural and numerical approach journal, December 2011

Relationship between Fatigue Strength and Grain Size in AZ31 Magnesium Alloys journal, January 2008

Grain refinement and fatigue strengthening mechanisms in as-extruded Mg–6Zn–0.5Zr and Mg–10Gd–3Y–0.5Zr magnesium alloys by shot peening journal, October 2013

Low-cycle Fatigue Behaviors of an As-extruded Mg–12%Gd–3%Y–0.5%Zr Alloy journal, August 2013

Low cycle fatigue of a rare-earth containing extruded magnesium alloy journal, July 2013

Effect of aging treatment on low-cycle fatigue behavior of extruded Mg–8Al–0.5Zn alloys journal, October 2012

Effects of humidity and temperature on the fatigue behaviour of an extruded AZ61 magnesium alloy journal, February 2005

Corrosion fatigue behavior of extruded magnesium alloy AZ61 under three different corrosive environments journal, October 2008

The effects of texture and extension twinning on the low-cycle fatigue behavior of a rolled magnesium alloy, AZ31B journal, October 2010

Effect of anisotropy on the low-cycle fatigue behavior of rolled AZ31 magnesium alloy journal, January 2010

Fatigue properties of rolled magnesium alloy (AZ31) sheet: Influence of specimen orientation journal, May 2011

Investigation of fatigue anisotropy in an extruded magnesium alloy journal, June 2013

Crystal plasticity-based forming limit prediction for non-cubic metals: Application to Mg alloy AZ31B journal, March 2009

3-D simulation of spatial stress distribution in an AZ31 Mg alloy sheet under in-plane compression journal, October 2011

A crystal plasticity model for hexagonal close packed (HCP) crystals including twinning and de-twinning mechanisms journal, October 2013

Modeling inelastic behavior of magnesium alloys during cyclic loading–unloading journal, August 2013

On the Swift effect and twinning in a rolled magnesium alloy under free-end torsion journal, August 2013

Strain controlled cyclic deformation behavior of an extruded magnesium alloy journal, November 2008

An experimental study on cyclic deformation and fatigue of extruded ZK60 magnesium alloy journal, March 2012

Cyclic deformation behavior of as-extruded Mg–3%Al–1%Zn journal, May 2008

The Nanostructured Origin of Deformation Twinning journal, January 2012

Deformation behavior of solid-solution-strengthened Mg–9 wt.% Al alloy: In situ neutron diffraction and elastic–viscoplastic self-consistent modeling journal, July 2014

Investigation of deformation dynamics in a wrought magnesium alloy journal, November 2014

Twinning–detwinning behavior during fatigue-crack propagation in a wrought magnesium alloy AZ31B journal, October 2012

VULCAN—The engineering diffractometer at the SNS journal, November 2006

First In Situ Lattice Strains Measurements Under Load at VULCAN journal, October 2010

Unraveling structural evolution of LiNi0.5Mn1.5O4 by in situ neutron diffraction journal, January 2013

In-situ observation of inhomogeneous degradation in large format Li-ion cells by neutron diffraction journal, August 2013

Revealing the cyclic hardening mechanism of an austenitic stainless steel by real-time in situ neutron diffraction journal, October 2014

Study of the mechanical properties of Mg-7.7at.% Al by in-situ neutron diffraction journal, July 1999

Bending Behavior of a Wrought Magnesium Alloy Investigated by the In Situ Pinhole Neutron Diffraction Method journal, August 2018

Tracing Phase Transformation and Lattice Evolution in a TRIP Sheet Steel under High-Temperature Annealing by Real-Time In Situ Neutron Diffraction journal, September 2018

A suite-level review of the neutron powder diffraction instruments at Oak Ridge National Laboratory journal, September 2018

Event-based processing of neutron scattering data at the Spallation Neutron Source journal, May 2018

Characterization of Crystallographic Structures Using Bragg-Edge Neutron Imaging at the Spallation Neutron Source journal, December 2017

Atomistic Simulation on the Twin Boundary Migration in Mg under Shear Deformation journal, September 2019

Atomistic Simulation on the Twin Boundary Migration in Mg under Shear Deformation journal, September 2019

Magnesium alloys and applications
journal, January 1994

Magnesium
journal, April 2001

Preface to the viewpoint set on: The current state of magnesium alloy science and technology
journal, October 2010

Fatigue of Magnesium Alloys
journal, May 2004

Inverse surface macro-segregation in high-pressure die-cast AM60 magnesium alloy and its effects on fatigue behavior
journal, May 2005

Low cycle fatigue properties of an extruded AZ31 magnesium alloy
journal, April 2009

Low-cycle fatigue characteristics of rolled Mg–3Al–1Zn alloy
journal, November 2010

Strain-Controlled Low-Cycle Fatigue Properties of a Newly Developed Extruded Magnesium Alloy
journal, October 2008

Crack initiation mechanism of extruded AZ31 magnesium alloy in the very high cycle fatigue regime
journal, September 2008

Plastic anisotropy and the role of non-basal slip in magnesium alloy AZ31B
journal, June 2005

Internal strain and texture evolution during deformation twinning in magnesium
journal, June 2005

Hardening evolution of AZ31B Mg sheet
journal, January 2007

Application of texture simulation to understanding mechanical behavior of Mg and solid solution alloys containing Li or Y
journal, December 2001

Twinning and the ductility of magnesium alloys
journal, August 2007

Study of slip mechanisms in a magnesium alloy by neutron diffraction and modeling
journal, April 2003

Twinning–detwinning behavior during the strain-controlled low-cycle fatigue testing of a wrought magnesium alloy, ZK60A
journal, February 2008

Internal stress relaxation and load redistribution during the twinning–detwinning-dominated cyclic deformation of a wrought magnesium alloy, ZK60A
journal, August 2008

The role of twinning and untwinning in yielding behavior in hot-extruded Mg–Al–Zn alloy
journal, February 2007

Deformation dynamics study of a wrought magnesium alloy by real-time in situ neutron diffraction
journal, September 2013

Modeling the effect of twinning and detwinning during strain-path changes of magnesium alloy AZ31
journal, May 2009

Low-Cycle Fatigue Behavior of an As-Extruded AM50 Magnesium Alloy
journal, May 2007

Effect of strain amplitude on tension–compression fatigue behavior of extruded Mg6Al1ZnA magnesium alloy
journal, May 2010

Study on cyclic deformation behavior of extruded Mg–3Al–1Zn alloy
journal, March 2012

Effects of hysteresis energy and mean stress on low-cycle fatigue behaviors of an extruded magnesium alloy
journal, June 2011

An experimental study of cyclic deformation of extruded AZ61A magnesium alloy
journal, May 2011

Effect of strain ratio on cyclic deformation and fatigue of extruded AZ61A magnesium alloy
journal, November 2012

Effect of strain ratio and strain rate on low cycle fatigue behavior of AZ31 wrought magnesium alloy
journal, August 2009

Microstructure and deformation mechanism of Mg6Al1ZnA alloy experienced tension–compression cyclic loading
journal, February 2011

Cyclic behavior of extruded magnesium: Experimental, microstructural and numerical approach
journal, December 2011

Relationship between Fatigue Strength and Grain Size in AZ31 Magnesium Alloys
journal, January 2008

Grain refinement and fatigue strengthening mechanisms in as-extruded Mg–6Zn–0.5Zr and Mg–10Gd–3Y–0.5Zr magnesium alloys by shot peening
journal, October 2013

Low-cycle Fatigue Behaviors of an As-extruded Mg–12%Gd–3%Y–0.5%Zr Alloy
journal, August 2013

Low cycle fatigue of a rare-earth containing extruded magnesium alloy
journal, July 2013

Effect of aging treatment on low-cycle fatigue behavior of extruded Mg–8Al–0.5Zn alloys
journal, October 2012

Effects of humidity and temperature on the fatigue behaviour of an extruded AZ61 magnesium alloy
journal, February 2005

Corrosion fatigue behavior of extruded magnesium alloy AZ61 under three different corrosive environments
journal, October 2008

The effects of texture and extension twinning on the low-cycle fatigue behavior of a rolled magnesium alloy, AZ31B
journal, October 2010

Effect of anisotropy on the low-cycle fatigue behavior of rolled AZ31 magnesium alloy
journal, January 2010

Fatigue properties of rolled magnesium alloy (AZ31) sheet: Influence of specimen orientation
journal, May 2011

Investigation of fatigue anisotropy in an extruded magnesium alloy
journal, June 2013

Crystal plasticity-based forming limit prediction for non-cubic metals: Application to Mg alloy AZ31B
journal, March 2009

3-D simulation of spatial stress distribution in an AZ31 Mg alloy sheet under in-plane compression
journal, October 2011

A crystal plasticity model for hexagonal close packed (HCP) crystals including twinning and de-twinning mechanisms
journal, October 2013

Modeling inelastic behavior of magnesium alloys during cyclic loading–unloading
journal, August 2013

On the Swift effect and twinning in a rolled magnesium alloy under free-end torsion
journal, August 2013

Strain controlled cyclic deformation behavior of an extruded magnesium alloy
journal, November 2008

An experimental study on cyclic deformation and fatigue of extruded ZK60 magnesium alloy
journal, March 2012

Cyclic deformation behavior of as-extruded Mg–3%Al–1%Zn
journal, May 2008

The Nanostructured Origin of Deformation Twinning
journal, January 2012

Deformation behavior of solid-solution-strengthened Mg–9 wt.% Al alloy: In situ neutron diffraction and elastic–viscoplastic self-consistent modeling
journal, July 2014

Investigation of deformation dynamics in a wrought magnesium alloy
journal, November 2014

Twinning–detwinning behavior during fatigue-crack propagation in a wrought magnesium alloy AZ31B
journal, October 2012

VULCAN—The engineering diffractometer at the SNS
journal, November 2006

First In Situ Lattice Strains Measurements Under Load at VULCAN
journal, October 2010

Unraveling structural evolution of LiNi0.5Mn1.5O4 by in situ neutron diffraction
journal, January 2013

In-situ observation of inhomogeneous degradation in large format Li-ion cells by neutron diffraction
journal, August 2013

Revealing the cyclic hardening mechanism of an austenitic stainless steel by real-time in situ neutron diffraction
journal, October 2014

Study of the mechanical properties of Mg-7.7at.% Al by in-situ neutron diffraction
journal, July 1999

Bending Behavior of a Wrought Magnesium Alloy Investigated by the In Situ Pinhole Neutron Diffraction Method
journal, August 2018

Tracing Phase Transformation and Lattice Evolution in a TRIP Sheet Steel under High-Temperature Annealing by Real-Time In Situ Neutron Diffraction
journal, September 2018

A suite-level review of the neutron powder diffraction instruments at Oak Ridge National Laboratory
journal, September 2018

Event-based processing of neutron scattering data at the Spallation Neutron Source
journal, May 2018

Characterization of Crystallographic Structures Using Bragg-Edge Neutron Imaging at the Spallation Neutron Source
journal, December 2017

Atomistic Simulation on the Twin Boundary Migration in Mg under Shear Deformation
journal, September 2019

Atomistic Simulation on the Twin Boundary Migration in Mg under Shear Deformation
journal, September 2019