skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Low-Temperature Plasticity in Olivine: Grain Size, Strain Hardening, and the Strength of the Lithosphere

Journal Article · · Journal of Geophysical Research. Solid Earth
DOI:https://doi.org/10.1029/2018jb016736· OSTI ID:1575005

Plastic deformation of olivine at relatively low temperatures (i.e., low-temperature plasticity) likely controls the strength of the lithospheric mantle in a variety of geodynamic contexts. Unfortunately, laboratory estimates of the strength of olivine deforming by low-temperature plasticity vary considerably from study to study, limiting confidence in extrapolation to geological conditions. Here we present the results of deformation experiments on olivine single crystals and aggregates conducted in a deformation-DIA at confining pressures of 5 to 9 GPa and temperatures of 298 to 1473 K. These results demonstrate that, under conditions in which low-temperature plasticity is the dominant deformation mechanism, fine-grained samples are stronger at yield than coarse-grained samples, and the yield stress decreases with increasing temperature. All samples exhibited significant strain hardening until an approximately constant flow stress was reached. The magnitude of the increase in stress from the yield stress to the flow stress was independent of grain size and temperature. Cyclical loading experiments revealed a Bauschinger effect, wherein the initial yield strength is higher than the yield strength during subsequent cycles. Both strain hardening and the Bauschinger effect are interpreted to result from the development of back stresses associated with long-range dislocation interactions. We calibrated a constitutive model based on these observations, and extrapolation of the model to geological conditions predicts that the strength of the lithosphere at yield is low compared to previous experimental predictions but increases significantly with increasing strain. Our results resolve apparent discrepancies in recent observational estimates of the strength of the oceanic lithosphere.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); Natural Environment Research Council (NERC); National Science Foundation (NSF)
Grant/Contract Number:
NEM0009661; 55176; 1806791; EAR1661511
OSTI ID:
1575005
Journal Information:
Journal of Geophysical Research. Solid Earth, Vol. 124, Issue 6; ISSN 2169-9313
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 38 works
Citation information provided by
Web of Science

References (74)

Modelling of work hardening and stress saturation in FCC metals journal July 1997
Micro-plasticity and recent insights from intermittent and small-scale plasticity journal January 2018
Study of the interaction between the indentation size effect and Hall–Petch effect with spherical indenters on annealed polycrystalline copper journal March 2008
Shear heating induced lithospheric-scale localization: Does it result in subduction? journal December 2012
A comparison of dislocation induced back stress formulations in strain gradient crystal plasticity journal November 2006
Six decades of the Hall–Petch effect – a survey of grain-size strengthening studies on pure metals journal June 2016
On the Yield Strength of Oceanic Lithosphere journal October 2017
Dislocation recovery in olivine under deep upper mantle conditions: Implications for creep and diffusion journal January 1993
A model for the grain size dependent work hardening of copper journal October 2006
The deformation-DIA: A new apparatus for high temperature triaxial deformation to pressures up to 15 GPa journal June 2003
Dislocation creep of fine-grained olivine journal January 2011
Low-temperature olivine rheology at high pressure journal July 2004
Gravity anomalies, flexure and mantle rheology seaward of circum-Pacific trenches journal July 2016
Low-temperature plasticity of olivine during high stress deformation of peridotite at lithospheric conditions — An experimental study journal November 2011
Lithospheric deformation induced by loading of the Hawaiian Islands and its implications for mantle rheology: CONSTRAINING LITHOSPHERE RHEOLOGY journal November 2013
The creep strength of the Earth's mantle journal January 1970
Thermal expansion of periclase and olivine, and their anharmonic properties. journal January 1975
A model for the effect of grain size on the yield stress of metals journal November 1982
The influence of grain boundaries on mechanical properties journal December 1972
Materials mechanical size effects: a review journal December 2008
Grain boundary sliding in San Carlos olivine: Flow law parameters and crystallographic-preferred orientation journal January 2011
Experimental constraints on the dynamics of the partially molten upper mantle: 2. Deformation in the dislocation creep regime journal August 1995
Stress evolution and associated microstructure during transient creep of olivine at 1000–1200 °C journal May 2018
Geometrically necessary dislocation densities in olivine obtained using high-angular resolution electron backscatter diffraction journal September 2016
Effects of grain size on the dislocation density and flow stress of niobium journal September 1967
Crystal–plastic deformation and recrystallization of peridotite controlled by the seismic cycle journal March 2012
The elastic constants of San Carlos olivine to 17 GPa journal June 1997
Fault rocks and fault mechanisms journal March 1977
Observations of flexure and the rheology of oceanic lithosphere journal September 2000
Limits on lithospheric stress imposed by laboratory experiments journal November 1980
Analysis of lattice strains measured under nonhydrostatic pressure journal June 1998
Bending stress and dissipation in subducted lithosphere: BENDING STRESSES AND DISSIPATION journal May 2012
Olivine friction at the base of oceanic seismogenic zones journal January 2007
Scale dependent crystal plasticity framework with dislocation density and grain boundary effects journal September 2004
An internal variable model of viscoplasticity journal January 1984
Plastic flow of oriented single crystals of olivine: 1. Mechanical data journal December 1977
The Indentation Size Effect: A Critical Examination of Experimental Observations and Mechanistic Interpretations journal June 2010
The plastic deformation of polycrystalline aggregates journal January 1962
Size effects resolve discrepancies in 40 years of work on low-temperature plasticity in olivine journal September 2017
Experimental deformation and recrystallization of olivine – processes and timescales of damage healing during postseismic relaxation at mantle depths journal January 2013
Non-local crystal plasticity model with intrinsic SSD and GND effects journal October 2004
Dislocation creep of calcite: DISLOCATION CREEP OF CALCITE journal December 2002
Grain size dependence of the strength of metals: The Hall–Petch effect does not scale as the inverse square root of grain size journal February 2014
Strength of the lithosphere: Constraints imposed by laboratory experiments journal September 1995
Elastic moduli, pressure derivatives, and temperature derivatives of single-crystal olivine and single-crystal forsterite journal November 1969
New measurements of activation volume in olivine under anhydrous conditions journal January 2009
The temperature variation of hardness of olivine and its implication for polycrystalline yield stress journal January 1979
Low-temperature plasticity of olivine revisited with in situ TEM nanomechanical testing journal March 2016
Rheology of the lithosphere beneath the central and western Tien Shan: RHEOLOGY Of LITHOSPHERE IN TIEN SHAN journal May 2015
Deformation of olivine at subduction zone conditions determined from in situ measurements with synchrotron radiation journal May 2011
High-temperature elasticity of iron-bearing olivines journal February 1992
Estimates of differential stress recorded in the dislocation structure of Lochseiten Limestone (Switzerland) journal June 1978
Theory of dislocations journal January 1953
Effect of pressure on the strength of olivine at room temperature journal October 2016
The effect of orientation on the grain size dependence of the yield strength of metals journal February 1964
Steady‐State Creep through Dislocation Climb journal March 1957
High-temperature creep of olivine single crystals 1. Mechanical results for buffered samples journal January 1991
Effect of grain size on the lower yield and flow stress of iron and steel journal January 1963
The deformation of plastically non-homogeneous materials journal February 1970
Precise stress measurements with white synchrotron x rays journal January 2010
Constitutive Equations, Rheological Behavior, and Viscosity of Rocks book April 2015
The Deformation and Ageing of Mild Steel: III Discussion of Results journal September 1951
Modelling the rheology of MgO under Earth’s mantle pressure, temperature and strain rates journal January 2012
A crystallographic model for the study of local deformation processes in polycrystals journal January 1999
Low‐temperature plastic rheology of olivine determined by nanoindentation journal January 2016
The Thermally Activated Deformation of Crystalline Materials journal January 1969
Kinetics of flow and strain-hardening journal November 1981
The Hall–Petch effect as a manifestation of the general size effect journal June 2016
Modelling the effect of pressure on the critical shear stress of MgO single crystals journal April 2012
An alternative physical explanation of the Hall–Petch relation journal February 2004
Experimental constraints on the strength of the lithospheric mantle journal January 2010
Low strength of Earth’s uppermost mantle inferred from tri-axial deformation experiments on dry olivine crystals journal July 2013
Theory of dislocations journal January 1949
High-temperature creep of olivine single crystals, 1, mechanical results for buffered samples journal November 1991

Cited By (2)

Vickers indentation tests on olivine: size effects journal January 2020
“Measures of Dissipation in Viscoelastic Media” Extended: Toward Continuous Characterization Across Very Broad Geophysical Time Scales journal August 2019

Similar Records

Experimental Constraints on the Strength of the Lithospheric Mantle
Journal Article · Fri Jan 01 00:00:00 EST 2010 · Journal of Geophysical Research · OSTI ID:1575005

Deformation of Olivine at Mantle Pressure using D-DIA
Journal Article · Sun Jan 01 00:00:00 EST 2006 · European Journal of Mineralogy · OSTI ID:1575005

The Effect of Intracrystalline Water on the Mechanical Properties of Olivine at Room Temperature
Journal Article · Wed Feb 21 00:00:00 EST 2024 · Geophysical Research Letters · OSTI ID:1575005

Related Subjects