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Assessment of effect of ductile tearing on cleavage failure probability in ductile to brittle transition region

Tiwari, Abhishek; Singh, R. N. LU and Ståhle, Per LU (2017) In International Journal of Fracture p.1-24
Abstract

The fracture behaviour of ferritic and ferritic martensitic steels in ductile to brittle transition (DBT) region has been extensively studied in recent years and a probabilistic approach of master curve method is generally used to describe the fracture toughness of BCC steels in DBT region as a function of temperature. The assessment of cleavage failure probability however is still untouched in the upper region of ductile to brittle transition, although various extensions of master curve approach and various local approaches has been explored. Additionally the geometry and loading in tension and bending also adds up to the difficulties when cleavage failure is assisted with prior ductile tearing. In this work the cleavage fracture is... (More)

The fracture behaviour of ferritic and ferritic martensitic steels in ductile to brittle transition (DBT) region has been extensively studied in recent years and a probabilistic approach of master curve method is generally used to describe the fracture toughness of BCC steels in DBT region as a function of temperature. The assessment of cleavage failure probability however is still untouched in the upper region of ductile to brittle transition, although various extensions of master curve approach and various local approaches has been explored. Additionally the geometry and loading in tension and bending also adds up to the difficulties when cleavage failure is assisted with prior ductile tearing. In this work the cleavage fracture is investigated in upper region of DBT and a modified master curve approach is presented which can satisfactorily describe the fracture toughness as a function of temperature as well as amount of ductile tearing preceded by cleavage.

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author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Ductile tearing, Master curve, Triaxiality, Upper DBT
in
International Journal of Fracture
pages
24 pages
publisher
Springer
external identifiers
  • scopus:85026909553
ISSN
0376-9429
DOI
10.1007/s10704-017-0238-7
language
English
LU publication?
yes
id
b53226b2-ee71-488a-8ac9-3f114547366a
date added to LUP
2017-08-31 12:35:49
date last changed
2017-08-31 12:35:49
@article{b53226b2-ee71-488a-8ac9-3f114547366a,
  abstract     = {<p>The fracture behaviour of ferritic and ferritic martensitic steels in ductile to brittle transition (DBT) region has been extensively studied in recent years and a probabilistic approach of master curve method is generally used to describe the fracture toughness of BCC steels in DBT region as a function of temperature. The assessment of cleavage failure probability however is still untouched in the upper region of ductile to brittle transition, although various extensions of master curve approach and various local approaches has been explored. Additionally the geometry and loading in tension and bending also adds up to the difficulties when cleavage failure is assisted with prior ductile tearing. In this work the cleavage fracture is investigated in upper region of DBT and a modified master curve approach is presented which can satisfactorily describe the fracture toughness as a function of temperature as well as amount of ductile tearing preceded by cleavage.</p>},
  author       = {Tiwari, Abhishek and Singh, R. N. and Ståhle, Per},
  issn         = {0376-9429},
  keyword      = {Ductile tearing,Master curve,Triaxiality,Upper DBT},
  language     = {eng},
  month        = {07},
  pages        = {1--24},
  publisher    = {Springer},
  series       = {International Journal of Fracture},
  title        = {Assessment of effect of ductile tearing on cleavage failure probability in ductile to brittle transition region},
  url          = {http://dx.doi.org/10.1007/s10704-017-0238-7},
  year         = {2017},
}