Local Approach to Fracture of an Aged Duplex Stainless Steel

The local approach to fracture (LAF) is a methodology aimed to calculate macroscopic fracture properties of a body, from the knowledge of the local stress - strain field at the fracture site, and the modeling of the acting fracture mechanisms. In the present work, this method was applied to a CF8M s...

Full description

Bibliographic Details
Main Authors: Alfredo Hazarabedian, Pierre Forget, Bernard Marini
Format: Article
Language:English
Published: Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) 2002-06-01
Series:Materials Research
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392002000200008
id doaj-1cd53195a81c4e0da5f1ad8df415fc27
record_format Article
spelling doaj-1cd53195a81c4e0da5f1ad8df415fc272020-11-24T22:30:05ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392002-06-015213113510.1590/S1516-14392002000200008Local Approach to Fracture of an Aged Duplex Stainless SteelAlfredo HazarabedianPierre ForgetBernard MariniThe local approach to fracture (LAF) is a methodology aimed to calculate macroscopic fracture properties of a body, from the knowledge of the local stress - strain field at the fracture site, and the modeling of the acting fracture mechanisms. In the present work, this method was applied to a CF8M steel, aged 30000h at 325 °C, in order to elucidate if LAF could be able to describe the measured fracture toughness data. We have simulated the elastoplastic behavior using the Gurson model and the general methodology of Joly. The required parameters were obtained from the stress strain curve and from the damage progression study by quantitative metallography. We extended the validity of that methodology for a material aged in a more realistic condition, i.e. at a relatively lower temperature and for a longer time. The model was found satisfactory because it was able to describe the experimental distribution of the fracture probability vs. fracture strain of notched axisymmetric specimens, without any parameter fitting. The model also predicted the lower bound of the experimental distribution of the crack resistance at 0.2 mm of crack extension (J02).http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392002000200008local approach to fracturetoughnessduplex stainless steelsaging
collection DOAJ
language English
format Article
sources DOAJ
author Alfredo Hazarabedian
Pierre Forget
Bernard Marini
spellingShingle Alfredo Hazarabedian
Pierre Forget
Bernard Marini
Local Approach to Fracture of an Aged Duplex Stainless Steel
Materials Research
local approach to fracture
toughness
duplex stainless steels
aging
author_facet Alfredo Hazarabedian
Pierre Forget
Bernard Marini
author_sort Alfredo Hazarabedian
title Local Approach to Fracture of an Aged Duplex Stainless Steel
title_short Local Approach to Fracture of an Aged Duplex Stainless Steel
title_full Local Approach to Fracture of an Aged Duplex Stainless Steel
title_fullStr Local Approach to Fracture of an Aged Duplex Stainless Steel
title_full_unstemmed Local Approach to Fracture of an Aged Duplex Stainless Steel
title_sort local approach to fracture of an aged duplex stainless steel
publisher Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
series Materials Research
issn 1516-1439
publishDate 2002-06-01
description The local approach to fracture (LAF) is a methodology aimed to calculate macroscopic fracture properties of a body, from the knowledge of the local stress - strain field at the fracture site, and the modeling of the acting fracture mechanisms. In the present work, this method was applied to a CF8M steel, aged 30000h at 325 °C, in order to elucidate if LAF could be able to describe the measured fracture toughness data. We have simulated the elastoplastic behavior using the Gurson model and the general methodology of Joly. The required parameters were obtained from the stress strain curve and from the damage progression study by quantitative metallography. We extended the validity of that methodology for a material aged in a more realistic condition, i.e. at a relatively lower temperature and for a longer time. The model was found satisfactory because it was able to describe the experimental distribution of the fracture probability vs. fracture strain of notched axisymmetric specimens, without any parameter fitting. The model also predicted the lower bound of the experimental distribution of the crack resistance at 0.2 mm of crack extension (J02).
topic local approach to fracture
toughness
duplex stainless steels
aging
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392002000200008
work_keys_str_mv AT alfredohazarabedian localapproachtofractureofanagedduplexstainlesssteel
AT pierreforget localapproachtofractureofanagedduplexstainlesssteel
AT bernardmarini localapproachtofractureofanagedduplexstainlesssteel
_version_ 1725742107637841920