Hetero-deformation induced (HDI) hardening does not increase linearly with strain gradient

Y. F. Wang; C. X. Huang; X. T. Fang; H. W. Höppel; M. Göken; Y. T. Zhu

doi:10.1016/j.scriptamat.2019.08.022

Hetero-deformation induced (HDI) hardening does not increase linearly with strain gradient

Y. F. Wang
, C. X. Huang
, X. T. Fang
, H. W. Höppel
, M. Göken
, Y. T. Zhu

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

211 Scopus citations

Abstract

Hetero-deformation induced (HDI) hardening has been attributed to geometrically necessary dislocations (GNDs) that are needed to accommodate strain gradient near the interfaces of heterostructured domains. Here we report that HDI hardening does not increase linearly with increasing strain gradient in the interface-affected zone. This is because some GND pileups may be absorbed by the interface and consequently does not contribute to HDI hardening with increasing strain gradient. Higher mechanical incompatibility across interface produces higher strain gradient. The strain gradient-dependent strengthening effect of heterostructured interface mainly originates from the development of HDI stress.

Original language	English
Pages (from-to)	19-23
Number of pages	5
Journal	Scripta Materialia
Volume	174
DOIs	https://doi.org/10.1016/j.scriptamat.2019.08.022
State	Published - 1 Jan 2020
Externally published	Yes

Keywords

Geometrically necessary dislocations
Hetero-deformation induced stress
Heterostructures
Interface
Strain gradient

Access to Document

10.1016/j.scriptamat.2019.08.022

Cite this

@article{5831ed5307884f4097030ee3399623e1,

title = "Hetero-deformation induced (HDI) hardening does not increase linearly with strain gradient",

abstract = "Hetero-deformation induced (HDI) hardening has been attributed to geometrically necessary dislocations (GNDs) that are needed to accommodate strain gradient near the interfaces of heterostructured domains. Here we report that HDI hardening does not increase linearly with increasing strain gradient in the interface-affected zone. This is because some GND pileups may be absorbed by the interface and consequently does not contribute to HDI hardening with increasing strain gradient. Higher mechanical incompatibility across interface produces higher strain gradient. The strain gradient-dependent strengthening effect of heterostructured interface mainly originates from the development of HDI stress.",

keywords = "Geometrically necessary dislocations, Hetero-deformation induced stress, Heterostructures, Interface, Strain gradient",

author = "Wang, \{Y. F.\} and Huang, \{C. X.\} and Fang, \{X. T.\} and H{\"o}ppel, \{H. W.\} and M. G{\"o}ken and Zhu, \{Y. T.\}",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2020",

month = jan,

day = "1",

doi = "10.1016/j.scriptamat.2019.08.022",

language = "英语",

volume = "174",

pages = "19--23",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

}

TY - JOUR

T1 - Hetero-deformation induced (HDI) hardening does not increase linearly with strain gradient

AU - Wang, Y. F.

AU - Huang, C. X.

AU - Fang, X. T.

AU - Höppel, H. W.

AU - Göken, M.

AU - Zhu, Y. T.

PY - 2020/1/1

Y1 - 2020/1/1

N2 - Hetero-deformation induced (HDI) hardening has been attributed to geometrically necessary dislocations (GNDs) that are needed to accommodate strain gradient near the interfaces of heterostructured domains. Here we report that HDI hardening does not increase linearly with increasing strain gradient in the interface-affected zone. This is because some GND pileups may be absorbed by the interface and consequently does not contribute to HDI hardening with increasing strain gradient. Higher mechanical incompatibility across interface produces higher strain gradient. The strain gradient-dependent strengthening effect of heterostructured interface mainly originates from the development of HDI stress.

AB - Hetero-deformation induced (HDI) hardening has been attributed to geometrically necessary dislocations (GNDs) that are needed to accommodate strain gradient near the interfaces of heterostructured domains. Here we report that HDI hardening does not increase linearly with increasing strain gradient in the interface-affected zone. This is because some GND pileups may be absorbed by the interface and consequently does not contribute to HDI hardening with increasing strain gradient. Higher mechanical incompatibility across interface produces higher strain gradient. The strain gradient-dependent strengthening effect of heterostructured interface mainly originates from the development of HDI stress.

KW - Geometrically necessary dislocations

KW - Hetero-deformation induced stress

KW - Heterostructures

KW - Interface

KW - Strain gradient

UR - https://www.scopus.com/pages/publications/85071275520

U2 - 10.1016/j.scriptamat.2019.08.022

DO - 10.1016/j.scriptamat.2019.08.022

M3 - 文章

AN - SCOPUS:85071275520

SN - 1359-6462

VL - 174

SP - 19

EP - 23

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Hetero-deformation induced (HDI) hardening does not increase linearly with strain gradient

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this