Fracture toughness enhanced by severe plastic deformation in low carbon steel

Masaki Tanaka, Naoki Fujimoto, Tatsuo Yokote, Kenji Higashida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The enhancement of toughness at low temperatures in fine-grained low carbon steel was studied, basing on the theory of crack-tip shielding due to dislocations. Low carbon steel was subjected to an accumulative roll bonding (ARB) process for grain refining. The grain size perpendicular to the normal direction was decreased to approximately 200nm after the ARB process. The fracture toughness of low carbon steel with the ARB process was measured at 77K by four-point bending, comparing with the fracture toughness of those without the ARB. It was found that the value of fracture toughness at 77K was increased by grain refining due to the ARB process, indicating that the ARB process enhances toughness at low temperatures and that the brittle-to-ductile transition (BDT) temperature shifted to a lower temperature. Quasi-two-dimensional simulations of dislocation dynamics, taking into account crack tip shielding due to dislocations, were performed to investigate the effect of a dislocation source spacing along a crack front on the BDT. The simulation indicates that the BDT temperature is decreased by decreasing the dislocation source spacing.

Original languageEnglish
Title of host publicationMaterials Science Forum - Nanomaterials by Severe Plastic Deformation 4 - 4th International Conference on Nanomaterials by Severe Plastic Deformation
PublisherTrans Tech Publications Ltd
Pages637-642
Number of pages6
Volume584-586 PART 2
ISBN (Print)9770255547605
Publication statusPublished - 2008
Event4th International Conference on Nanomaterials by Severe Plastic Deformation - Goslar, Germany
Duration: Aug 18 2008Aug 22 2008

Publication series

NameMaterials Science Forum
Volume584-586 PART 2
ISSN (Print)02555476

Other

Other4th International Conference on Nanomaterials by Severe Plastic Deformation
CountryGermany
CityGoslar
Period8/18/088/22/08

Fingerprint

Roll bonding
low carbon steels
Low carbon steel
fracture strength
plastic deformation
Fracture toughness
Plastic deformation
crack tips
refining
toughness
Crack tips
Shielding
Superconducting transition temperature
Refining
Toughness
shielding
transition temperature
spacing
Temperature
cracks

All Science Journal Classification (ASJC) codes

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

Cite this

Tanaka, M., Fujimoto, N., Yokote, T., & Higashida, K. (2008). Fracture toughness enhanced by severe plastic deformation in low carbon steel. In Materials Science Forum - Nanomaterials by Severe Plastic Deformation 4 - 4th International Conference on Nanomaterials by Severe Plastic Deformation (Vol. 584-586 PART 2, pp. 637-642). (Materials Science Forum; Vol. 584-586 PART 2). Trans Tech Publications Ltd.

Fracture toughness enhanced by severe plastic deformation in low carbon steel. / Tanaka, Masaki; Fujimoto, Naoki; Yokote, Tatsuo; Higashida, Kenji.

Materials Science Forum - Nanomaterials by Severe Plastic Deformation 4 - 4th International Conference on Nanomaterials by Severe Plastic Deformation. Vol. 584-586 PART 2 Trans Tech Publications Ltd, 2008. p. 637-642 (Materials Science Forum; Vol. 584-586 PART 2).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tanaka, M, Fujimoto, N, Yokote, T & Higashida, K 2008, Fracture toughness enhanced by severe plastic deformation in low carbon steel. in Materials Science Forum - Nanomaterials by Severe Plastic Deformation 4 - 4th International Conference on Nanomaterials by Severe Plastic Deformation. vol. 584-586 PART 2, Materials Science Forum, vol. 584-586 PART 2, Trans Tech Publications Ltd, pp. 637-642, 4th International Conference on Nanomaterials by Severe Plastic Deformation, Goslar, Germany, 8/18/08.
Tanaka M, Fujimoto N, Yokote T, Higashida K. Fracture toughness enhanced by severe plastic deformation in low carbon steel. In Materials Science Forum - Nanomaterials by Severe Plastic Deformation 4 - 4th International Conference on Nanomaterials by Severe Plastic Deformation. Vol. 584-586 PART 2. Trans Tech Publications Ltd. 2008. p. 637-642. (Materials Science Forum).
Tanaka, Masaki ; Fujimoto, Naoki ; Yokote, Tatsuo ; Higashida, Kenji. / Fracture toughness enhanced by severe plastic deformation in low carbon steel. Materials Science Forum - Nanomaterials by Severe Plastic Deformation 4 - 4th International Conference on Nanomaterials by Severe Plastic Deformation. Vol. 584-586 PART 2 Trans Tech Publications Ltd, 2008. pp. 637-642 (Materials Science Forum).
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