Nucleation Theory for Yielding of Nearly Defect-Free Crystals: Understanding Rate Dependent Yield Points

Vikranth Sagar Reddy; Parswa Nath; Jürgen Horbach; Peter Sollich; Surajit Sengupta

doi:10.1103/PhysRevLett.124.025503

Nucleation Theory for Yielding of Nearly Defect-Free Crystals: Understanding Rate Dependent Yield Points

Vikranth Sagar Reddy^*, Parswa Nath, Jürgen Horbach, Peter Sollich, Surajit Sengupta

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

23 Downloads (Pure)

Abstract

Experiments and simulations show that when an initially defect-free rigid crystal is subjected to deformation at a constant rate, irreversible plastic flow commences at the so-called yield point. The yield point is a weak function of the deformation rate, which is usually expressed as a power law with an extremely small nonuniversal exponent. We reanalyze a representative set of published data on nanometer sized, mostly defect-free Cu, Ni, and Au crystals in light of a recently proposed theory of yielding based on nucleation of stable stress-free regions inside the metastable rigid solid. The single relation derived here, which is not a power law, explains data covering 15 orders of magnitude in timescales.

Original language	English
Article number	025503
Journal	Physical Review Letters
Volume	124
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.124.025503
Publication status	Published - 16 Jan 2020

Keywords

nucleation
crystals
yield point
non-affinity

Access to Document

10.1103/PhysRevLett.124.025503

1908.08829Accepted author manuscript, 2.79 MB

Cite this

@article{30fd6501f2064cf9b81b90fdb8e96de1,

title = "Nucleation Theory for Yielding of Nearly Defect-Free Crystals: Understanding Rate Dependent Yield Points",

abstract = "Experiments and simulations show that when an initially defect-free rigid crystal is subjected to deformation at a constant rate, irreversible plastic flow commences at the so-called yield point. The yield point is a weak function of the deformation rate, which is usually expressed as a power law with an extremely small nonuniversal exponent. We reanalyze a representative set of published data on nanometer sized, mostly defect-free Cu, Ni, and Au crystals in light of a recently proposed theory of yielding based on nucleation of stable stress-free regions inside the metastable rigid solid. The single relation derived here, which is not a power law, explains data covering 15 orders of magnitude in timescales.",

keywords = "nucleation, crystals, yield point, non-affinity",

author = "Reddy, {Vikranth Sagar} and Parswa Nath and J{\"u}rgen Horbach and Peter Sollich and Surajit Sengupta",

year = "2020",

month = jan,

day = "16",

doi = "10.1103/PhysRevLett.124.025503",

language = "English",

volume = "124",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

number = "2",

}

TY - JOUR

T1 - Nucleation Theory for Yielding of Nearly Defect-Free Crystals

T2 - Understanding Rate Dependent Yield Points

AU - Reddy, Vikranth Sagar

AU - Nath, Parswa

AU - Horbach, Jürgen

AU - Sollich, Peter

AU - Sengupta, Surajit

PY - 2020/1/16

Y1 - 2020/1/16

N2 - Experiments and simulations show that when an initially defect-free rigid crystal is subjected to deformation at a constant rate, irreversible plastic flow commences at the so-called yield point. The yield point is a weak function of the deformation rate, which is usually expressed as a power law with an extremely small nonuniversal exponent. We reanalyze a representative set of published data on nanometer sized, mostly defect-free Cu, Ni, and Au crystals in light of a recently proposed theory of yielding based on nucleation of stable stress-free regions inside the metastable rigid solid. The single relation derived here, which is not a power law, explains data covering 15 orders of magnitude in timescales.

AB - Experiments and simulations show that when an initially defect-free rigid crystal is subjected to deformation at a constant rate, irreversible plastic flow commences at the so-called yield point. The yield point is a weak function of the deformation rate, which is usually expressed as a power law with an extremely small nonuniversal exponent. We reanalyze a representative set of published data on nanometer sized, mostly defect-free Cu, Ni, and Au crystals in light of a recently proposed theory of yielding based on nucleation of stable stress-free regions inside the metastable rigid solid. The single relation derived here, which is not a power law, explains data covering 15 orders of magnitude in timescales.

KW - nucleation

KW - crystals

KW - yield point

KW - non-affinity

UR - http://www.scopus.com/inward/record.url?scp=85078515621&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.124.025503

DO - 10.1103/PhysRevLett.124.025503

M3 - Article

C2 - 32004040

AN - SCOPUS:85078515621

SN - 0031-9007

VL - 124

JO - Physical Review Letters

JF - Physical Review Letters

IS - 2

M1 - 025503

ER -

Nucleation Theory for Yielding of Nearly Defect-Free Crystals: Understanding Rate Dependent Yield Points

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this