Data for Grain Growth in Olivine + Ferropericlase Rocks Deformed to High Strains

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Persistent link to this item

https://doi.org/10.13020/ej3r-m032
https://hdl.handle.net/11299/257464

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Keywords

olivine

ferropericlase

grain growth

two-phase

EBSD

Collection period

2020-02-02
2020-12-01

Date completed

2020-12-01

Date updated

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Geographic coverage

Source information

Journal Title

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Volume Title

Title

Data for Grain Growth in Olivine + Ferropericlase Rocks Deformed to High Strains

Published Date

2023-10-12

Authors

Wiesman, Harison S

Zimmerman, Marrk E

Kohlstedt, David L

Group

University of Minnesota Rock and Mineral Physics Lab

Author Contact

Wiesman, Harison S
wiesm010@umn.edu

Type

Dataset
Experimental Data

Abstract

We performed grain growth experiments on four samples of olivine (Ol) + periclase (Per); three samples contained volume fractions of fPer = 0.2, 0.5, 0.8 of Per100 while the fourth contained fPer = 0.2 of Per70, a Fe-bearing periclase. Prior to the grain growth experiments, these samples were deformed to shear strains of γ = 6 – 7, which resulted in a well-mixed, random distribution of grains of both phases among each other. After deformation, samples were statically annealed for 10 h and 100 h at T = 1523 K in a one-atmosphere furnace to facilitate grain growth. Almost all grain growth occurred within the first 10 h of annealing and only the sample containing fPer = 0.8 experienced additional, albeit limited, grain growth up to 100 h. Additionally, grain growth laws determined for single-phase samples of Ol and Per predict increases in grain size by factors of 4 and 5, respectively after 100 h of annealing, larger than observed in our experiments. We attribute the initial increase in grain size during the first 10 h of annealing to stored strain energy from deformation and/or Ostwald ripening, however the kinetics of grain growth are too slow in our samples to allow for grain growth over longer periods of time. The lack of significant grain growth in our study reaffirms the importance of Zener pinning in polymineralic rocks deformed to large strains, such that, once mixing is thorough, pinning along interphase boundaries is effective at maintaining a fine grain size.

Description

This repository contains backscatter electron (BSE) images electron backscatter diffraction (EBSD) maps for grain growth experiments created at the UMN characterization facility. Each sample has its own zipped folder containing the the EBSD data for annealing experiments at 0, 10, and 100 h. AllData.zip contains all of the EBSD data and BSE images for the samples included in the associated paper.

Referenced by

Wiesman et al. (in prep)

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License

CC0 1.0 Universal
http://creativecommons.org/publicdomain/zero/1.0/

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Collections

Data Repository for U of M (DRUM)

Funding information

National Science Foundation: EAR-1755498 & EAR-1755805

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Previously Published Citation

Suggested citation

Wiesman, Harison S; Zimmerman, Marrk E; Kohlstedt, David L. (2023). Data for Grain Growth in Olivine + Ferropericlase Rocks Deformed to High Strains. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/ej3r-m032.

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