Evolution of heterogeneous deformation microstructures during cold rolling of poly-crystalline ti-added ultra low carbon steel

Genki Tsukamoto, Tatsuya Morikawa, Kenji Higashida, Ken Kimura, Kohsaku Ushioda

Research output: Contribution to journalArticle

Abstract

Deformation microstructures developed by cold-rolling in Ti-added ultra low carbon steel have been investigated by the same site analyses for dislocation substructures and crystal orientation by employing the techniques of SEM-AsB and SEM-EBSD. Particular attention has been paid on the relationship between the characteristics of deformation microstructures and preferred crystallographic orientations after coldrolling. Moreover, correlation between the formation of newly observed fine grains around grain boundaries and preferred orientations was also examined, taking into consideration the grain boundary characteristics. Microstructural characteristics of each crystal orientation observed using AsB and EBSD are as follows: (1) grains with γ-fiber (ND//<111>) have relatively fine cell structures, where the micro bands or shear bands are frequently observed. (2) grains with the orientation of γ-fiber (RD//<110>) have coarse cell structures except the case that they are γ-fiber. Nanoindentation tests for those microstructures demonstrated an orientation dependence in which the hardness of γ-fiber is higher than that of the other oriented fibers. Such orientation dependences of microstructures and hardness indicate that work hardening in γ-fiber is more enhanced than that in other fibers. It is also to be noted that fine grains were observed around some grain boundaries. Many of those boundaries are adjacent to the γ-fiber, which indicates that new grains are formed in the vicinity of boundaries during cold-rolling although they are limited in well work-hardened grains.

Original languageEnglish
Pages (from-to)1476-1483
Number of pages8
Journalisij international
Volume57
Issue number8
DOIs
Publication statusPublished - Jan 1 2017

Fingerprint

Cold rolling
Low carbon steel
Crystalline materials
Microstructure
Fibers
Crystal orientation
Grain boundaries
Hardness
Scanning electron microscopy
Shear bands
Nanoindentation
Dislocations (crystals)
Strain hardening

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Evolution of heterogeneous deformation microstructures during cold rolling of poly-crystalline ti-added ultra low carbon steel. / Tsukamoto, Genki; Morikawa, Tatsuya; Higashida, Kenji; Kimura, Ken; Ushioda, Kohsaku.

In: isij international, Vol. 57, No. 8, 01.01.2017, p. 1476-1483.

Research output: Contribution to journalArticle

Tsukamoto, Genki ; Morikawa, Tatsuya ; Higashida, Kenji ; Kimura, Ken ; Ushioda, Kohsaku. / Evolution of heterogeneous deformation microstructures during cold rolling of poly-crystalline ti-added ultra low carbon steel. In: isij international. 2017 ; Vol. 57, No. 8. pp. 1476-1483.
@article{2cbe11b65f0b4cb9ad535418c3991c38,
title = "Evolution of heterogeneous deformation microstructures during cold rolling of poly-crystalline ti-added ultra low carbon steel",
abstract = "Deformation microstructures developed by cold-rolling in Ti-added ultra low carbon steel have been investigated by the same site analyses for dislocation substructures and crystal orientation by employing the techniques of SEM-AsB and SEM-EBSD. Particular attention has been paid on the relationship between the characteristics of deformation microstructures and preferred crystallographic orientations after coldrolling. Moreover, correlation between the formation of newly observed fine grains around grain boundaries and preferred orientations was also examined, taking into consideration the grain boundary characteristics. Microstructural characteristics of each crystal orientation observed using AsB and EBSD are as follows: (1) grains with γ-fiber (ND//<111>) have relatively fine cell structures, where the micro bands or shear bands are frequently observed. (2) grains with the orientation of γ-fiber (RD//<110>) have coarse cell structures except the case that they are γ-fiber. Nanoindentation tests for those microstructures demonstrated an orientation dependence in which the hardness of γ-fiber is higher than that of the other oriented fibers. Such orientation dependences of microstructures and hardness indicate that work hardening in γ-fiber is more enhanced than that in other fibers. It is also to be noted that fine grains were observed around some grain boundaries. Many of those boundaries are adjacent to the γ-fiber, which indicates that new grains are formed in the vicinity of boundaries during cold-rolling although they are limited in well work-hardened grains.",
author = "Genki Tsukamoto and Tatsuya Morikawa and Kenji Higashida and Ken Kimura and Kohsaku Ushioda",
year = "2017",
month = "1",
day = "1",
doi = "10.2355/isijinternational.ISIJINT-2017-102",
language = "English",
volume = "57",
pages = "1476--1483",
journal = "ISIJ International",
issn = "0915-1559",
publisher = "Iron and Steel Institute of Japan",
number = "8",

}

TY - JOUR

T1 - Evolution of heterogeneous deformation microstructures during cold rolling of poly-crystalline ti-added ultra low carbon steel

AU - Tsukamoto, Genki

AU - Morikawa, Tatsuya

AU - Higashida, Kenji

AU - Kimura, Ken

AU - Ushioda, Kohsaku

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Deformation microstructures developed by cold-rolling in Ti-added ultra low carbon steel have been investigated by the same site analyses for dislocation substructures and crystal orientation by employing the techniques of SEM-AsB and SEM-EBSD. Particular attention has been paid on the relationship between the characteristics of deformation microstructures and preferred crystallographic orientations after coldrolling. Moreover, correlation between the formation of newly observed fine grains around grain boundaries and preferred orientations was also examined, taking into consideration the grain boundary characteristics. Microstructural characteristics of each crystal orientation observed using AsB and EBSD are as follows: (1) grains with γ-fiber (ND//<111>) have relatively fine cell structures, where the micro bands or shear bands are frequently observed. (2) grains with the orientation of γ-fiber (RD//<110>) have coarse cell structures except the case that they are γ-fiber. Nanoindentation tests for those microstructures demonstrated an orientation dependence in which the hardness of γ-fiber is higher than that of the other oriented fibers. Such orientation dependences of microstructures and hardness indicate that work hardening in γ-fiber is more enhanced than that in other fibers. It is also to be noted that fine grains were observed around some grain boundaries. Many of those boundaries are adjacent to the γ-fiber, which indicates that new grains are formed in the vicinity of boundaries during cold-rolling although they are limited in well work-hardened grains.

AB - Deformation microstructures developed by cold-rolling in Ti-added ultra low carbon steel have been investigated by the same site analyses for dislocation substructures and crystal orientation by employing the techniques of SEM-AsB and SEM-EBSD. Particular attention has been paid on the relationship between the characteristics of deformation microstructures and preferred crystallographic orientations after coldrolling. Moreover, correlation between the formation of newly observed fine grains around grain boundaries and preferred orientations was also examined, taking into consideration the grain boundary characteristics. Microstructural characteristics of each crystal orientation observed using AsB and EBSD are as follows: (1) grains with γ-fiber (ND//<111>) have relatively fine cell structures, where the micro bands or shear bands are frequently observed. (2) grains with the orientation of γ-fiber (RD//<110>) have coarse cell structures except the case that they are γ-fiber. Nanoindentation tests for those microstructures demonstrated an orientation dependence in which the hardness of γ-fiber is higher than that of the other oriented fibers. Such orientation dependences of microstructures and hardness indicate that work hardening in γ-fiber is more enhanced than that in other fibers. It is also to be noted that fine grains were observed around some grain boundaries. Many of those boundaries are adjacent to the γ-fiber, which indicates that new grains are formed in the vicinity of boundaries during cold-rolling although they are limited in well work-hardened grains.

UR - http://www.scopus.com/inward/record.url?scp=85027895502&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85027895502&partnerID=8YFLogxK

U2 - 10.2355/isijinternational.ISIJINT-2017-102

DO - 10.2355/isijinternational.ISIJINT-2017-102

M3 - Article

VL - 57

SP - 1476

EP - 1483

JO - ISIJ International

JF - ISIJ International

SN - 0915-1559

IS - 8

ER -