Effect of grain boundary segregation of carbon on critical grain boundary strength of ferritic steel

S. Araki, K. Mashima, T. Masumura, Toshihiro Tsuchiyma, S. Takaki, T. Ohmura

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The critical shear stress for dislocation emission at grain boundary was directly measured by nanoindentation technique. The change in the grain boundary strength with low-temperature aging was then discussed. It was found that the critical grain boundary shear stress increased, and the increment was correlated to the amount of carbon segregated at the grain boundary. From the relationship between the lower yield point and the amount of segregated carbon, it was concluded that the Hall–Petch coefficient (ky) increased with grain boundary segregation. The validity of the pile-up theory explaining ky, which depends on the grain boundary strength, was demonstrated.

Original languageEnglish
Pages (from-to)38-41
Number of pages4
JournalScripta Materialia
Volume169
DOIs
Publication statusPublished - Aug 1 2019

Fingerprint

Ferritic steel
Grain boundaries
Carbon
grain boundaries
steels
carbon
shear stress
Shear stress
critical loading
Nanoindentation
yield point
piles
nanoindentation
Dislocations (crystals)
Piles
Aging of materials
coefficients

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Cite this

Effect of grain boundary segregation of carbon on critical grain boundary strength of ferritic steel. / Araki, S.; Mashima, K.; Masumura, T.; Tsuchiyma, Toshihiro; Takaki, S.; Ohmura, T.

In: Scripta Materialia, Vol. 169, 01.08.2019, p. 38-41.

Research output: Contribution to journalArticle

Araki, S. ; Mashima, K. ; Masumura, T. ; Tsuchiyma, Toshihiro ; Takaki, S. ; Ohmura, T. / Effect of grain boundary segregation of carbon on critical grain boundary strength of ferritic steel. In: Scripta Materialia. 2019 ; Vol. 169. pp. 38-41.
@article{8e218389ca3f4b89bd3771aaed751c6c,
title = "Effect of grain boundary segregation of carbon on critical grain boundary strength of ferritic steel",
abstract = "The critical shear stress for dislocation emission at grain boundary was directly measured by nanoindentation technique. The change in the grain boundary strength with low-temperature aging was then discussed. It was found that the critical grain boundary shear stress increased, and the increment was correlated to the amount of carbon segregated at the grain boundary. From the relationship between the lower yield point and the amount of segregated carbon, it was concluded that the Hall–Petch coefficient (ky) increased with grain boundary segregation. The validity of the pile-up theory explaining ky, which depends on the grain boundary strength, was demonstrated.",
author = "S. Araki and K. Mashima and T. Masumura and Toshihiro Tsuchiyma and S. Takaki and T. Ohmura",
year = "2019",
month = "8",
day = "1",
doi = "10.1016/j.scriptamat.2019.05.001",
language = "English",
volume = "169",
pages = "38--41",
journal = "Scripta Materialia",
issn = "1359-6462",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Effect of grain boundary segregation of carbon on critical grain boundary strength of ferritic steel

AU - Araki, S.

AU - Mashima, K.

AU - Masumura, T.

AU - Tsuchiyma, Toshihiro

AU - Takaki, S.

AU - Ohmura, T.

PY - 2019/8/1

Y1 - 2019/8/1

N2 - The critical shear stress for dislocation emission at grain boundary was directly measured by nanoindentation technique. The change in the grain boundary strength with low-temperature aging was then discussed. It was found that the critical grain boundary shear stress increased, and the increment was correlated to the amount of carbon segregated at the grain boundary. From the relationship between the lower yield point and the amount of segregated carbon, it was concluded that the Hall–Petch coefficient (ky) increased with grain boundary segregation. The validity of the pile-up theory explaining ky, which depends on the grain boundary strength, was demonstrated.

AB - The critical shear stress for dislocation emission at grain boundary was directly measured by nanoindentation technique. The change in the grain boundary strength with low-temperature aging was then discussed. It was found that the critical grain boundary shear stress increased, and the increment was correlated to the amount of carbon segregated at the grain boundary. From the relationship between the lower yield point and the amount of segregated carbon, it was concluded that the Hall–Petch coefficient (ky) increased with grain boundary segregation. The validity of the pile-up theory explaining ky, which depends on the grain boundary strength, was demonstrated.

UR - http://www.scopus.com/inward/record.url?scp=85065590587&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85065590587&partnerID=8YFLogxK

U2 - 10.1016/j.scriptamat.2019.05.001

DO - 10.1016/j.scriptamat.2019.05.001

M3 - Article

AN - SCOPUS:85065590587

VL - 169

SP - 38

EP - 41

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

ER -