Small scale testing approach to reveal specific features of slip behavior in BCC metals

Nousha Kheradmand; Bjørn Rune Rogne; Stéphane Dumoulin; Yun Deng; Roy Johnsen; Afrooz Barnoush

doi:10.1016/j.actamat.2019.05.031

Small scale testing approach to reveal specific features of slip behavior in BCC metals

Nousha Kheradmand^*, Bjørn Rune Rogne, Stéphane Dumoulin, Yun Deng, Roy Johnsen, Afrooz Barnoush

^*Corresponding author for this work

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

8 Citations (Scopus)

Abstract

Plastic behavior of Fe–3%Si was investigated with a novel methodology at microscopic scale and higher stress resolution beyond the existing macroscopic test methods. Activation of single slip system in micropillars under compression provides perfect shear and excludes the lattice rotation. Crystallographic orientation dependency of critical resolved shear stress (CRSS)was observed. Different scenarios regarding activated slip planes are discussed to explain this orientation dependency. Schmid's law approach, which only considers the stress component parallel to the Burgers vector, fails to explain this orientation dependency of CRSS. It is shown that the non-glide stress components should be taken into account in order to precisely define the plasticity in BCC metals.

Original language	English
Pages (from-to)	142-152
Number of pages	11
Journal	Acta Materialia
Volume	174
DOIs	https://doi.org/10.1016/j.actamat.2019.05.031
Publication status	Published - 1 Aug 2019
Externally published	Yes

Keywords

Compression test
Critical resolved shear stress
Fe–3wt.%Si
Non-glide stresses

Access to Document

10.1016/j.actamat.2019.05.031

Cite this

@article{f83f94edc0de4d879603d84dbda149a3,

title = "Small scale testing approach to reveal specific features of slip behavior in BCC metals",

abstract = "Plastic behavior of Fe–3%Si was investigated with a novel methodology at microscopic scale and higher stress resolution beyond the existing macroscopic test methods. Activation of single slip system in micropillars under compression provides perfect shear and excludes the lattice rotation. Crystallographic orientation dependency of critical resolved shear stress (CRSS)was observed. Different scenarios regarding activated slip planes are discussed to explain this orientation dependency. Schmid's law approach, which only considers the stress component parallel to the Burgers vector, fails to explain this orientation dependency of CRSS. It is shown that the non-glide stress components should be taken into account in order to precisely define the plasticity in BCC metals.",

keywords = "Compression test, Critical resolved shear stress, Fe–3wt.%Si, Non-glide stresses",

author = "Nousha Kheradmand and Rogne, {Bj{\o}rn Rune} and St{\'e}phane Dumoulin and Yun Deng and Roy Johnsen and Afrooz Barnoush",

note = "Publisher Copyright: {\textcopyright} 2019 Acta Materialia Inc.",

year = "2019",

month = aug,

day = "1",

doi = "10.1016/j.actamat.2019.05.031",

language = "English",

volume = "174",

pages = "142--152",

journal = "Acta Materialia",

issn = "1359-6454",

publisher = "Acta Materialia Inc",

}

TY - JOUR

T1 - Small scale testing approach to reveal specific features of slip behavior in BCC metals

AU - Kheradmand, Nousha

AU - Rogne, Bjørn Rune

AU - Dumoulin, Stéphane

AU - Deng, Yun

AU - Johnsen, Roy

AU - Barnoush, Afrooz

PY - 2019/8/1

Y1 - 2019/8/1

N2 - Plastic behavior of Fe–3%Si was investigated with a novel methodology at microscopic scale and higher stress resolution beyond the existing macroscopic test methods. Activation of single slip system in micropillars under compression provides perfect shear and excludes the lattice rotation. Crystallographic orientation dependency of critical resolved shear stress (CRSS)was observed. Different scenarios regarding activated slip planes are discussed to explain this orientation dependency. Schmid's law approach, which only considers the stress component parallel to the Burgers vector, fails to explain this orientation dependency of CRSS. It is shown that the non-glide stress components should be taken into account in order to precisely define the plasticity in BCC metals.

AB - Plastic behavior of Fe–3%Si was investigated with a novel methodology at microscopic scale and higher stress resolution beyond the existing macroscopic test methods. Activation of single slip system in micropillars under compression provides perfect shear and excludes the lattice rotation. Crystallographic orientation dependency of critical resolved shear stress (CRSS)was observed. Different scenarios regarding activated slip planes are discussed to explain this orientation dependency. Schmid's law approach, which only considers the stress component parallel to the Burgers vector, fails to explain this orientation dependency of CRSS. It is shown that the non-glide stress components should be taken into account in order to precisely define the plasticity in BCC metals.

KW - Compression test

KW - Critical resolved shear stress

KW - Fe–3wt.%Si

KW - Non-glide stresses

UR - http://www.scopus.com/inward/record.url?scp=85066272995&partnerID=8YFLogxK

U2 - 10.1016/j.actamat.2019.05.031

DO - 10.1016/j.actamat.2019.05.031

M3 - Article

AN - SCOPUS:85066272995

SN - 1359-6454

VL - 174

SP - 142

EP - 152

JO - Acta Materialia

JF - Acta Materialia

ER -

Small scale testing approach to reveal specific features of slip behavior in BCC metals

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this