Dislocation-θ' (Al2Cu) interactions during creep deformation of an Al-Cu alloy

Milligan, Brian; Ma, Dong; Allard, Lawrence; Clarke, Amy; Shyam, Amit

doi:10.1016/j.scriptamat.2022.114739

Title: Dislocation-θ' (Al2Cu) interactions during creep deformation of an Al-Cu alloy

Abstract

While precipitate-dislocation interactions are well-understood for Al-Cu alloys in tension, creep behavior has seen far less study. New, thermally-stabilized Al-Cu alloys have θ' (Al₂Cu) as strengthening precipitates that remain stable up to 300 °C (~60% of the melting temperature) and higher, where creep becomes essential to the mechanical behavior. This investigation identifies the precipitate-dislocation interactions in such an Al-Cu alloy using in-situ neutron diffraction and scanning transmission electron microscopy. Significant load transfer to the θ' precipitates occurs, which can be attributed to dislocation loops on the interfaces of θ' and the Al matrix. Thus, Orowan looping is identified to be the primary activity for precipitate-dislocation interactions. As Orowan looping and load transfer are associated with significant strain hardening, these results explain the excellent creep resistance seen in this alloy, and provide insights into the design of precipitation strengthened alloys with superior creep performance.

Authors:

^[1];

^[2];

^[3]; Clarke, Amy ^[4];

^[3]

Colorado School of Mines, Golden, CO (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Songshan Lake Materials Laboratory, Guangdong (China)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Colorado School of Mines, Golden, CO (United States)

Publication Date:: Sun May 08 00:00:00 EDT 2022

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

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; National Science Foundation (NSF)

OSTI Identifier:: 1867787

Grant/Contract Number:: AC05-00OR22725; 1624836

Resource Type:: Accepted Manuscript

Journal Name:: Scripta Materialia

Additional Journal Information:: Journal Volume: 217; Journal Issue: August; Journal ID: ISSN 1359-6462

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Milligan, Brian, Ma, Dong, Allard, Lawrence, Clarke, Amy, and Shyam, Amit. Dislocation-θ' (Al2Cu) interactions during creep deformation of an Al-Cu alloy.  United States: N. p., 2022. 
Web.  doi:10.1016/j.scriptamat.2022.114739.

Copy to clipboard


                    Milligan, Brian, Ma, Dong, Allard, Lawrence, Clarke, Amy, & Shyam, Amit. Dislocation-θ' (Al2Cu) interactions during creep deformation of an Al-Cu alloy.  United States.  https://doi.org/10.1016/j.scriptamat.2022.114739

Copy to clipboard


                    Milligan, Brian, Ma, Dong, Allard, Lawrence, Clarke, Amy, and Shyam, Amit. Sun .  
"Dislocation-θ' (Al2Cu) interactions during creep deformation of an Al-Cu alloy".  United States.  https://doi.org/10.1016/j.scriptamat.2022.114739.  https://www.osti.gov/servlets/purl/1867787.

Copy to clipboard


                    
@article{osti_1867787,

  title        = {Dislocation-θ' (Al2Cu) interactions during creep deformation of an Al-Cu alloy},

  author       = {Milligan, Brian and Ma, Dong and Allard, Lawrence and Clarke, Amy and Shyam, Amit},

  abstractNote = {While precipitate-dislocation interactions are well-understood for Al-Cu alloys in tension, creep behavior has seen far less study. New, thermally-stabilized Al-Cu alloys have θ' (Al2Cu) as strengthening precipitates that remain stable up to 300 °C (~60% of the melting temperature) and higher, where creep becomes essential to the mechanical behavior. This investigation identifies the precipitate-dislocation interactions in such an Al-Cu alloy using in-situ neutron diffraction and scanning transmission electron microscopy. Significant load transfer to the θ' precipitates occurs, which can be attributed to dislocation loops on the interfaces of θ' and the Al matrix. Thus, Orowan looping is identified to be the primary activity for precipitate-dislocation interactions. As Orowan looping and load transfer are associated with significant strain hardening, these results explain the excellent creep resistance seen in this alloy, and provide insights into the design of precipitation strengthened alloys with superior creep performance.},

  doi          = {10.1016/j.scriptamat.2022.114739},

  journal      = {Scripta Materialia},

  number       = August,

  volume       = 217,

  place        = {United States},

  year         = {Sun May 08 00:00:00 EDT 2022},

  month        = {Sun May 08 00:00:00 EDT 2022}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1016/j.scriptamat.2022.114739

Other availability

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Elevated temperature microstructural stability in cast AlCuMnZr alloys through solute segregation
journal, September 2019

Shyam, A.; Roy, S.; Shin, D.
Materials Science and Engineering: A, Vol. 765
DOI: 10.1016/j.msea.2019.138279

Impact of microstructural stability on the creep behavior of cast Al–Cu alloys
journal, January 2020

Milligan, Brian K.; Roy, Shibayan; Hawkins, Charles S.
Materials Science and Engineering: A, Vol. 772
DOI: 10.1016/j.msea.2019.138697

Theory of Steady‐State Creep Based on Dislocation Climb
journal, October 1955

Weertman, J.
Journal of Applied Physics, Vol. 26, Issue 10
DOI: 10.1063/1.1721875

Annealing kinetics of voids and the Self-diffusion coefficient in aluminum
journal, January 1968

Volin, T. E.; Balluffi, R. W.
Physica Status Solidi (b), Vol. 25, Issue 1
DOI: 10.1002/pssb.19680250116

Probing Novel Microstructural Evolution Mechanisms in Aluminum Alloys Using 4D Nanoscale Characterization
journal, September 2017

Kaira, C. Shashank; De Andrade, V.; Singh, Sudhanshu S.
Advanced Materials, Vol. 29, Issue 41
DOI: 10.1002/adma.201703482

Creep properties and precipitate evolution in Al–Li alloys microalloyed with Sc and Yb
journal, July 2012

Krug, Matthew E.; Seidman, David N.; Dunand, David C.
Materials Science and Engineering: A, Vol. 550
DOI: 10.1016/j.msea.2012.04.075

Dislocation dynamics in aluminum containing θ’ phase: Atomistic simulation and continuum modeling
journal, August 2019

Krasnikov, Vasiliy S.; Mayer, Alexander E.
International Journal of Plasticity, Vol. 119
DOI: 10.1016/j.ijplas.2019.02.010

Analysis of tracer and nuclear magnetic resonance measurements of self-diffusion in aluminium
journal, December 1971

Seeger, A.; Wolf, D.; Mehrer, H.
Physica Status Solidi (b), Vol. 48, Issue 2
DOI: 10.1002/pssb.2220480205

Modeling the creep threshold stress due to climb of a dislocation in the stress field of a misfitting precipitate
journal, August 2011

Krug, Matthew E.; Dunand, David C.
Acta Materialia, Vol. 59, Issue 13
DOI: 10.1016/j.actamat.2011.04.044

Phase-Field Simulation of Orowan Strengthening by Coherent Precipitate Plates in an Aluminum Alloy
journal, May 2015

Liu, Hong; Gao, Yipeng; Qi, Liang
Metallurgical and Materials Transactions A, Vol. 46, Issue 7
DOI: 10.1007/s11661-015-2895-3

Climb of Orowan loops in an overaged Al–Li alloy
journal, July 1997

Monzen, Ryoichi; Mizutani, Hidehiro
Materials Science and Engineering: A, Vol. 231, Issue 1-2
DOI: 10.1016/S0921-5093(97)00066-X

Antiphase boundary energies and the transition from shearing to looping in alloys strengthened by ordered precipitates
journal, October 1988

Ardell, A. J.; Huang, J. C.
Philosophical Magazine Letters, Vol. 58, Issue 4
DOI: 10.1080/09500838808214752

Elastic Constants of Aluminum
journal, June 1964

Vallin, J.; Mongy, M.; Salama, K.
Journal of Applied Physics, Vol. 35, Issue 6
DOI: 10.1063/1.1713749

A comparison of the creep properties of an Al-6092 composite and the unreinforced matrix alloy
journal, October 1998

Li, Yong; Langdon, Terence G.
Metallurgical and Materials Transactions A, Vol. 29, Issue 10
DOI: 10.1007/s11661-998-0224-9

The effect of shear-resistant, plate-shaped precipitates on the work hardening of Al alloys: Towards a prediction of the strength–elongation correlation
journal, December 2009

da Costa Teixeira, J.; Bourgeois, L.; Sinclair, C. W.
Acta Materialia, Vol. 57, Issue 20
DOI: 10.1016/j.actamat.2009.08.034

Crystallographic orientation-dependent strain hardening in a precipitation-strengthened Al-Cu alloy
journal, February 2021

Milligan, Brian; Ma, Dong; Allard, Lawrence
Acta Materialia, Vol. 205
DOI: 10.1016/j.actamat.2020.116577

Precipitation Hardening in the First Aerospace Aluminum Alloy: The Wright Flyer Crankcase
journal, November 1994

Gayle, F. W.; Goodway, M.
Science, Vol. 266, Issue 5187
DOI: 10.1126/science.266.5187.1015

Segregation-sandwiched stable interface suffocates nanoprecipitate coarsening to elevate creep resistance
journal, July 2020

Gao, Y. H.; Guan, P. F.; Su, R.
Materials Research Letters, Vol. 8, Issue 12
DOI: 10.1080/21663831.2020.1799447

Creep strengthening in a discontinuous SiC-Al composite
journal, December 1995

Park, Kyung-Tae; Mohamed, Farghalli A.
Metallurgical and Materials Transactions A, Vol. 26, Issue 12
DOI: 10.1007/BF02669441

Revealing the atomistic nature of dislocation-precipitate interactions in Al-Cu alloys
journal, August 2019

Adlakha, I.; Garg, P.; Solanki, K. N.
Journal of Alloys and Compounds, Vol. 797
DOI: 10.1016/j.jallcom.2019.05.110

Steady state creep behaviour of silicon carbide particulate reinforced aluminium composites
journal, August 1992

Pandey, A. B.; Mishra, R. S.; Mahajan, Y. R.
Acta Metallurgica et Materialia, Vol. 40, Issue 8
DOI: 10.1016/0956-7151(92)90190-P

Investigation of creep deformation mechanisms at intermediate temperatures in René 88 DT
journal, June 2005

Viswanathan, G. B.; Sarosi, P. M.; Henry, M. F.
Acta Materialia, Vol. 53, Issue 10
DOI: 10.1016/j.actamat.2005.03.017

Similar Records in DOE PAGES and OSTI.GOV collections:

Crystallographic orientation-dependent strain hardening in a precipitation-strengthened Al-Cu alloy

Journal Article Milligan, Brian K. ; Ma, Dong ; Allard Jr, Lawrence ; ... - Acta Materialia

While the strengthening of Al-Cu alloys due to precipitation has been extensively studied, the effect of crystallographic orientation of the matrix and precipitates, as well as precipitate morphology, on the strain hardening behavior is not well understood. In this paper, we investigate this effect with in situ neutron diffraction during deformation of an Al-Cu alloy (206) after multiple aging treatments. Precipitate-dislocation interactions were found to change from precipitate shearing for microstructures predominantly containing GPI and θ" precipitates to Orowan looping for microstructures with primarily θ' and θ precipitates. Notably, significant anisotropy in strain hardening behavior was observed when θ' precipitatesmore »« less
https://doi.org/10.1016/j.actamat.2020.116577

Full Text Available
Progression of creep deformation from grain boundaries to grain interior in Al-Cu-Mn-Zr alloys

Journal Article Rakhmonov, Jovid U. ; Milligan, Brian K. ; Bahl, Sumit ; ... - Acta Materialia

Creep mechanisms are studied in θ'-Al₂Cu-strengthened Al-Cu-Mn-Zr alloys at 300 and 350°C for (i) ACMZ, a base alloy without further alloying elements and (ii) RR350, a commercial alloy with additions of Ni and Co forming distinct grain-boundary precipitates. At high stresses, creep is dominated by dislocations bypassing θ' precipitates within grains via the Orowan mechanism, as evidenced by (i) very high stress exponent (n~20-25) and (ii) α-Al and θ' lattice strains (measured via in-situ neutron diffraction) evolving during creep in a manner consistent with load transfer from the plastically-deforming α-Al matrix to elastically-deforming θ' precipitates. At intermediate stresses, both alloysmore »« less
https://doi.org/10.1016/j.actamat.2023.118886

Full Text Available
Cavitation-resistant intergranular precipitates enhance creep performance of θ'-strengthened Al-Cu based alloys

Journal Article Rakhmonov, Jovid U. ; Bahl, Sumit ; Shyam, Amit ; ... - Acta Materialia

Tensile and compressive creep properties of a quaternary Al-Cu-Mn-Zr (ACMZ) alloy and its commercial counterpart (Al-Cu-Mn-Zr with Ni, Co and Sb additions, RR350) are investigated at 300°C. At low stresses up to 30 MPa where diffusional creep dominates, creep resistance is the same in tension and compression and RR350 deforms more slowly than ACMZ, consistent with RR350 alloy's larger linear fraction of intergranular precipitates (Al7Cu2(NiFe) and Al9FeNi for RR350 vs. θ-Al2Cu for ACMZ) and a reduced fraction of precipitate-free zones near grain boundaries. At stresses between 30 and 80 MPa, dislocation creep with a stress exponent n ~ 3 becomesmore »« less
https://doi.org/10.1016/j.actamat.2022.117788

Full Text Available
Creep deformation and cavitation in an additively manufactured Al-8.6Cu-0.4Mn-0.9Zr (wt%) alloy

Journal Article Rakhmonov, Jovid U. ; Michi, Richard ; Bahl, Sumit ; ... - Additive Manufacturing

Creep deformation and cavitation were investigated at 300 ºC in both tension and compression for an additively manufactured Al-8.6Cu-0.5Mn-0.9Zr (wt%) alloy in the as-fabricated state and after various aging treatments (aging at 300 °C/200 h or 350 °C/24 h and overaging at 400 °C/200 h). Creep mechanisms at 300 °C were determined by relating the measured creep response to corresponding microstructural and X-ray computed tomography observations. In compression, alloys in the as-fabricated and two aging conditions exhibited similarly high creep resistance. Overaging (400 °C/200 h) led to substantial coarsening of intragranular θ-Al2Cu precipitates and an expected drop in their Orowanmore »« less
https://doi.org/10.1016/j.addma.2024.104097
Load shuffling during creep deformation of an additively manufactured AlCuMnZr alloy

Journal Article Michi, Richard A. ; Bahl, Sumit ; Fancher, Christopher M. ; ... - Acta Materialia

Here, the high-temperature deformation behavior of an additively manufactured Al-Cu-Mn-Zr alloy is evaluated in the as-fabricated and heat-treated states using traditional ex-situ and in-situ neutron diffraction creep experiments performed at 300 °C. The dominant reinforcement phase in the alloy, θ-Al₂Cu, despite its high volume fraction of ~10%, does not provide load transfer strengthening during creep deformation. Instead, the lattice strain evolution suggests a new mechanism we term “load shuffling” wherein the initial load is transferred away from precipitate-free zones along the grain boundaries where most of the θ-Al₂Cu particles are located to precipitate-strengthened grain interiors. Notwithstanding the lack of load transfermore »« less
https://doi.org/10.1016/j.actamat.2022.118557

Full Text Available

Similar Records

Title: Dislocation-θ' (Al2Cu) interactions during creep deformation of an Al-Cu alloy

Abstract

Citation Formats

Elevated temperature microstructural stability in cast AlCuMnZr alloys through solute segregation journal, September 2019

Impact of microstructural stability on the creep behavior of cast Al–Cu alloys journal, January 2020

Theory of Steady‐State Creep Based on Dislocation Climb journal, October 1955

Annealing kinetics of voids and the Self-diffusion coefficient in aluminum journal, January 1968

Probing Novel Microstructural Evolution Mechanisms in Aluminum Alloys Using 4D Nanoscale Characterization journal, September 2017

Creep properties and precipitate evolution in Al–Li alloys microalloyed with Sc and Yb journal, July 2012

Dislocation dynamics in aluminum containing θ’ phase: Atomistic simulation and continuum modeling journal, August 2019

Analysis of tracer and nuclear magnetic resonance measurements of self-diffusion in aluminium journal, December 1971

Modeling the creep threshold stress due to climb of a dislocation in the stress field of a misfitting precipitate journal, August 2011

Phase-Field Simulation of Orowan Strengthening by Coherent Precipitate Plates in an Aluminum Alloy journal, May 2015

Climb of Orowan loops in an overaged Al–Li alloy journal, July 1997

Antiphase boundary energies and the transition from shearing to looping in alloys strengthened by ordered precipitates journal, October 1988

Elastic Constants of Aluminum journal, June 1964

A comparison of the creep properties of an Al-6092 composite and the unreinforced matrix alloy journal, October 1998

The effect of shear-resistant, plate-shaped precipitates on the work hardening of Al alloys: Towards a prediction of the strength–elongation correlation journal, December 2009

Crystallographic orientation-dependent strain hardening in a precipitation-strengthened Al-Cu alloy journal, February 2021

Precipitation Hardening in the First Aerospace Aluminum Alloy: The Wright Flyer Crankcase journal, November 1994

Segregation-sandwiched stable interface suffocates nanoprecipitate coarsening to elevate creep resistance journal, July 2020

Creep strengthening in a discontinuous SiC-Al composite journal, December 1995

Revealing the atomistic nature of dislocation-precipitate interactions in Al-Cu alloys journal, August 2019

Steady state creep behaviour of silicon carbide particulate reinforced aluminium composites journal, August 1992

Investigation of creep deformation mechanisms at intermediate temperatures in René 88 DT journal, June 2005

Elevated temperature microstructural stability in cast AlCuMnZr alloys through solute segregation
journal, September 2019

Impact of microstructural stability on the creep behavior of cast Al–Cu alloys
journal, January 2020

Theory of Steady‐State Creep Based on Dislocation Climb
journal, October 1955

Annealing kinetics of voids and the Self-diffusion coefficient in aluminum
journal, January 1968

Probing Novel Microstructural Evolution Mechanisms in Aluminum Alloys Using 4D Nanoscale Characterization
journal, September 2017

Creep properties and precipitate evolution in Al–Li alloys microalloyed with Sc and Yb
journal, July 2012

Dislocation dynamics in aluminum containing θ’ phase: Atomistic simulation and continuum modeling
journal, August 2019

Analysis of tracer and nuclear magnetic resonance measurements of self-diffusion in aluminium
journal, December 1971

Modeling the creep threshold stress due to climb of a dislocation in the stress field of a misfitting precipitate
journal, August 2011

Phase-Field Simulation of Orowan Strengthening by Coherent Precipitate Plates in an Aluminum Alloy
journal, May 2015

Climb of Orowan loops in an overaged Al–Li alloy
journal, July 1997

Antiphase boundary energies and the transition from shearing to looping in alloys strengthened by ordered precipitates
journal, October 1988

Elastic Constants of Aluminum
journal, June 1964

A comparison of the creep properties of an Al-6092 composite and the unreinforced matrix alloy
journal, October 1998

The effect of shear-resistant, plate-shaped precipitates on the work hardening of Al alloys: Towards a prediction of the strength–elongation correlation
journal, December 2009

Crystallographic orientation-dependent strain hardening in a precipitation-strengthened Al-Cu alloy
journal, February 2021

Precipitation Hardening in the First Aerospace Aluminum Alloy: The Wright Flyer Crankcase
journal, November 1994

Segregation-sandwiched stable interface suffocates nanoprecipitate coarsening to elevate creep resistance
journal, July 2020

Creep strengthening in a discontinuous SiC-Al composite
journal, December 1995

Revealing the atomistic nature of dislocation-precipitate interactions in Al-Cu alloys
journal, August 2019

Steady state creep behaviour of silicon carbide particulate reinforced aluminium composites
journal, August 1992

Investigation of creep deformation mechanisms at intermediate temperatures in René 88 DT
journal, June 2005