A crystallographic examination of fracture mechanism in low cycle fatigue of pure iron at low temperature

Desheng Xia, Jun Komotori, Masao Shimizu

Research output: Contribution to journalArticle

Abstract

Low-cycle fatigue tests were performed at-140°C using commercial grade pure iron having average ferrite grain size of 400 μ. A crystallographic examination of deformation twins around the fracture origination site has been carried out based on detailed observation of fracture surface using scanning electron microscope. The following two conclusions have been obtained. (1) For all the observed internal fracture modes in which internal cracks initiate at (i) the intersection of a deformation twin and a grain boundary (T-B type), (ii) the intersection of deformation twins (T-T type) and (iii) the intersection of a deformation twin and an inclusion (T-I type), the deformation twins which result in the final fracture of specimens belong to the {112} twinning group defined in this paper. ( 2 ) In the case of T-T type, an intersection of definite kinds of deformation twins among the {112} twinning group intersecting along {021} direction causes a cleavage fracture on {001} plane.

Original languageEnglish
Pages (from-to)1211-1214
Number of pages4
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume64
Issue number621
Publication statusPublished - 1998
Externally publishedYes

Fingerprint

Iron
Fatigue of materials
Twinning
Temperature
Ferrite
Grain boundaries
Electron microscopes
Cracks
Scanning

Keywords

  • Deformation twin
  • Fatigue
  • Fracture mechanism
  • Low temperature. pure iron
  • Low-cycle fatigue

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

@article{45d90ea08a70435db3af75cd63ad9ed0,
title = "A crystallographic examination of fracture mechanism in low cycle fatigue of pure iron at low temperature",
abstract = "Low-cycle fatigue tests were performed at-140°C using commercial grade pure iron having average ferrite grain size of 400 μ. A crystallographic examination of deformation twins around the fracture origination site has been carried out based on detailed observation of fracture surface using scanning electron microscope. The following two conclusions have been obtained. (1) For all the observed internal fracture modes in which internal cracks initiate at (i) the intersection of a deformation twin and a grain boundary (T-B type), (ii) the intersection of deformation twins (T-T type) and (iii) the intersection of a deformation twin and an inclusion (T-I type), the deformation twins which result in the final fracture of specimens belong to the {112} twinning group defined in this paper. ( 2 ) In the case of T-T type, an intersection of definite kinds of deformation twins among the {112} twinning group intersecting along {021} direction causes a cleavage fracture on {001} plane.",
keywords = "Deformation twin, Fatigue, Fracture mechanism, Low temperature. pure iron, Low-cycle fatigue",
author = "Desheng Xia and Jun Komotori and Masao Shimizu",
year = "1998",
language = "English",
volume = "64",
pages = "1211--1214",
journal = "Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A",
issn = "0387-5008",
publisher = "Japan Society of Mechanical Engineers",
number = "621",

}

TY - JOUR

T1 - A crystallographic examination of fracture mechanism in low cycle fatigue of pure iron at low temperature

AU - Xia, Desheng

AU - Komotori, Jun

AU - Shimizu, Masao

PY - 1998

Y1 - 1998

N2 - Low-cycle fatigue tests were performed at-140°C using commercial grade pure iron having average ferrite grain size of 400 μ. A crystallographic examination of deformation twins around the fracture origination site has been carried out based on detailed observation of fracture surface using scanning electron microscope. The following two conclusions have been obtained. (1) For all the observed internal fracture modes in which internal cracks initiate at (i) the intersection of a deformation twin and a grain boundary (T-B type), (ii) the intersection of deformation twins (T-T type) and (iii) the intersection of a deformation twin and an inclusion (T-I type), the deformation twins which result in the final fracture of specimens belong to the {112} twinning group defined in this paper. ( 2 ) In the case of T-T type, an intersection of definite kinds of deformation twins among the {112} twinning group intersecting along {021} direction causes a cleavage fracture on {001} plane.

AB - Low-cycle fatigue tests were performed at-140°C using commercial grade pure iron having average ferrite grain size of 400 μ. A crystallographic examination of deformation twins around the fracture origination site has been carried out based on detailed observation of fracture surface using scanning electron microscope. The following two conclusions have been obtained. (1) For all the observed internal fracture modes in which internal cracks initiate at (i) the intersection of a deformation twin and a grain boundary (T-B type), (ii) the intersection of deformation twins (T-T type) and (iii) the intersection of a deformation twin and an inclusion (T-I type), the deformation twins which result in the final fracture of specimens belong to the {112} twinning group defined in this paper. ( 2 ) In the case of T-T type, an intersection of definite kinds of deformation twins among the {112} twinning group intersecting along {021} direction causes a cleavage fracture on {001} plane.

KW - Deformation twin

KW - Fatigue

KW - Fracture mechanism

KW - Low temperature. pure iron

KW - Low-cycle fatigue

UR - http://www.scopus.com/inward/record.url?scp=71249153448&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=71249153448&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:71249153448

VL - 64

SP - 1211

EP - 1214

JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A

JF - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A

SN - 0387-5008

IS - 621

ER -