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Evolution of dislocation substructures in metals via high-strain-rate nanoindentation

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America

Deformation at high strain rates often results in high stresses on many engineering materials, potentially leading to catastrophic failure without proper design. High-strain-rate mechanical testing is thus needed to improve the design of future structural materials for a wide range of applications. Although several high-strain-rate mechanical testing techniques have been developed to provide a fundamental understanding of material responses and microstructural evolution under high-strain-rate deformation conditions, these tests are often very time consuming and costly. In this work, we utilize a high-strain-rate nanoindentation testing technique and system in combination with transmission electron microscopy to reveal the deformation mechanisms and dislocation substructures that evolve in pure metals from low (10 –2 s –1 ) to very high indentation strain rates (10 4 s –1 ), using face-centered cubic aluminum and body-centered cubic molybdenum as model materials. The results help to establish the conditions under which micro- and macro-scale tests can be compared with validity and also provide a promising pathway that could lead to accelerated high-strain-rate testing at substantially reduced costs.

Research Organization:
Texas A & M Univ., College Station, TX (United States)
Sponsoring Organization:
US Army Research Office (ARO); USDOE; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003857
OSTI ID:
2229009
Alternate ID(s):
OSTI ID: 2472107
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 50 Vol. 120; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

References (61)

FIB Lift-Out Specimen Preparation Techniques book January 2005
High Rates and Impact Experiments book January 2008
Shock Waves and High-Strain-Rate Phenomena in Metals book January 1981
Constitutive behavior of tantalum and tantalum-tungsten alloys journal October 1996
Influence of peak pressure and temperature on the structure/property response of shock- loaded Ta and Ta-10W journal October 1995
Evaluation of strain rate sensitivity by constant load nanoindentation journal June 2012
Indentation power-law creep of high-purity indium journal March 1999
Dislocation kinetics at high strain rates journal December 1987
A constitutive description of the deformation of copper based on the use of the mechanical threshold stress as an internal state variable journal January 1988
Deformation twinning in Al-4.8 wt% Mg journal July 1988
A micro-indentation study of superplasticity in Pb, Sn, and Sn-38 wt% Pb journal August 1988
Strain rate history effects for polycrystalline aluminium and theory of intersections journal August 1968
On rate sensitivity of f.c.c. metals, instantaneous rate sensitivity and rate sensitivity of strain hardening journal January 1986
Thermally activated flow and strain rate history effects for some polycrystalline f.c.c. metals journal March 1975
Strain rate history effects and observations of dislocation substructure in aluminum single crystals following dynamic deformation journal February 1983
3. The deformed state of metals (II). Structure journal January 1980
Pressure-shear impact and the dynamic viscoplastic response of metals journal December 1985
The response of single crystal and polycrystal nickel to quasistatic and shock deformation journal January 1991
Experimental and theoretical study of mechanical behavior of 1100 aluminum in the strain rate range 10−5−104s−1 journal January 1992
Effect of residual strain on the substructure development and mechanical response of shock-loaded copper journal May 1989
Influence of repeated shock loading on the substructure evolution of 99.99 wt.% aluminum journal September 1991
The effect of dislocation drag on the stress-strain behavior of F.C.C. metals journal August 1992
Work hardening and rate sensitivity material coefficients for OFHC Cu and 99.99% A1 journal October 1984
Response of materials under dynamic loading journal January 2000
Indentation size effects in crystalline materials: A law for strain gradient plasticity journal March 1998
Dislocation Core Effects on Mobility book January 2004
Microstructural length-scale effects in the nanoindentation behavior of thin gold films journal April 2006
Atomistic processes of dislocation generation and plastic deformation during nanoindentation journal February 2011
Ultralong one-dimensional plastic zone created in aluminum underneath a nanoscale indent journal June 2022
High strain rate nanoindentation testing: Recent advancements, challenges and opportunities journal February 2023
Multiscale modelling of indentation in FCC metals: From atomic to continuum journal April 2010
On the upturn phenomenon in the strength vs. strain-rate relations of metals journal November 2019
A model of size effects in nano-indentation journal August 2006
Measurement of power-law creep parameters by instrumented indentation methods journal February 2013
A simple model for indentation creep journal March 2018
Decoupling indentation size and strain rate effects during nanoindentation: A case study in tungsten journal August 2022
On the measurement of hardness at high strain rates by nanoindentation impact testing journal January 2023
Green laser powder bed fusion based fabrication and rate-dependent mechanical properties of copper lattices journal July 2023
On the shock stress, substructure evolution, and spall response of commercially pure 1100-O aluminum journal November 2014
Indentation size effect in MgO journal September 2004
Indentation size effect in metallic materials: Correcting for the size of the plastic zone journal June 2005
Artificial intelligence and machine learning in design of mechanical materials journal January 2021
High-velocity micro-projectile impact testing journal March 2021
The Texas A&M University Hypervelocity Impact Laboratory: A modern aeroballistic range facility journal August 2022
Exploring the origins of the indentation size effect at submicron scales journal July 2021
The deformation of plastically non-homogeneous materials journal February 1970
Atomistic simulations of dislocation mobility in Al, Ni and Al/Mg alloys journal March 2005
Size Effects and Stochastic Behavior of Nanoindentation Pop In journal April 2011
Dynamic Indentation Hardness and Rate Sensitivity in Metals journal July 1999
Twin boundary migration mechanisms in quasi-statically compressed and plate-impacted Mg single crystals journal October 2021
High-Strain-Rate Deformation: Mechanical Behavior and Deformation Substructures Induced journal August 2012
The Indentation Size Effect: A Critical Examination of Experimental Observations and Mechanistic Interpretations journal June 2010
The Role of Strain Rate in the Formation of Dislocation Structure and Its Influence on the Mechanical Properties of Aluminium journal January 1972
High strain rate properties of metals and alloys journal May 2008
Critical issues in conducting constant strain rate nanoindentation tests at higher strain rates journal October 2019
Extending the range of constant strain rate nanoindentation testing journal January 2020
Thermally activated dislocation mechanism in Mo studied by indentation, compression and impact testing journal February 2021
High strain rate in situ micropillar compression of a Zr-based metallic glass journal April 2021
Advances in the measurement of hardness at high strain rates by nanoindentation journal February 2023
Dynamic Indentation Testing book January 2000
Ultra High Strain Rate Nanoindentation Testing journal June 2017

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