Assessing the Loading Rate for a Fracture Toughness Test in the Ductile-to-Brittle Transition Region

Research output: Contribution to report/book/conference proceedingsChapter

Standard

Assessing the Loading Rate for a Fracture Toughness Test in the Ductile-to-Brittle Transition Region. / Lucon, Enrico; Scibetta, Marc.

Fatigue and Fracture Mechanics - 36th Volume. Vol. 1 1. ed. West Conshohocken, PA, United States : ASTM International, 2009. p. 54-65.

Research output: Contribution to report/book/conference proceedingsChapter

Harvard

Lucon, E & Scibetta, M 2009, Assessing the Loading Rate for a Fracture Toughness Test in the Ductile-to-Brittle Transition Region. in Fatigue and Fracture Mechanics - 36th Volume. 1 edn, vol. 1, ASTM International, West Conshohocken, PA, United States, pp. 54-65.

APA

Lucon, E., & Scibetta, M. (2009). Assessing the Loading Rate for a Fracture Toughness Test in the Ductile-to-Brittle Transition Region. In Fatigue and Fracture Mechanics - 36th Volume (1 ed., Vol. 1, pp. 54-65). West Conshohocken, PA, United States: ASTM International.

Vancouver

Lucon E, Scibetta M. Assessing the Loading Rate for a Fracture Toughness Test in the Ductile-to-Brittle Transition Region. In Fatigue and Fracture Mechanics - 36th Volume. 1 ed. Vol. 1. West Conshohocken, PA, United States: ASTM International. 2009. p. 54-65

Author

Lucon, Enrico ; Scibetta, Marc. / Assessing the Loading Rate for a Fracture Toughness Test in the Ductile-to-Brittle Transition Region. Fatigue and Fracture Mechanics - 36th Volume. Vol. 1 1. ed. West Conshohocken, PA, United States : ASTM International, 2009. pp. 54-65

Bibtex - Download

@inbook{27ac27b5f2624a0b882b11b3e8e12308,
title = "Assessing the Loading Rate for a Fracture Toughness Test in the Ductile-to-Brittle Transition Region",
abstract = "For fracture toughness tests in the ductile-to-brittle transition region, ASTM E1921-05 requires specimens to be loaded using a loading rate dK/dt between 0.1 and 2 MPaVm/s during the initial elastic portion. It has been proposed that the standard allow testing at higher loading rates, including precracked Charpy specimens tested on an instrumented pendulum machine (impact toughness tests). The revised standard would require test results (KJc or To) to be reported along with the relevant loading rate, and should therefore provide guidance on how to assess the value of dK/dt in a relatively simple but reliable manner. Various options for measuring the loading rate have been investigated in this paper for several fracture toughness tests performed at different loading rates (quasi-static, dynamic, and impact). For each loading rate, three different toughness levels have been considered: low, medium, and high. Three considerably different materials have been selected: two RPV steels (JRQ, JSPS) and a ferritic/martensitic 9 {\%} chromium steel (EUROFER97). It is found that the preferable option is given by the ratio between KJc and time at the onset of cleavage, whereas the elastic value Kel/tel or the average dK/dt can be used whenpartial unloadings are performed.",
keywords = "ductile-to-brittle transition region, loading rate, impact toughness tests",
author = "Enrico Lucon and Marc Scibetta",
note = "Score = 3",
year = "2009",
month = "12",
language = "English",
isbn = "978-0-8031-3416-4",
volume = "1",
pages = "54--65",
booktitle = "Fatigue and Fracture Mechanics - 36th Volume",
publisher = "ASTM International",
edition = "1",

}

RIS - Download

TY - CHAP

T1 - Assessing the Loading Rate for a Fracture Toughness Test in the Ductile-to-Brittle Transition Region

AU - Lucon, Enrico

AU - Scibetta, Marc

N1 - Score = 3

PY - 2009/12

Y1 - 2009/12

N2 - For fracture toughness tests in the ductile-to-brittle transition region, ASTM E1921-05 requires specimens to be loaded using a loading rate dK/dt between 0.1 and 2 MPaVm/s during the initial elastic portion. It has been proposed that the standard allow testing at higher loading rates, including precracked Charpy specimens tested on an instrumented pendulum machine (impact toughness tests). The revised standard would require test results (KJc or To) to be reported along with the relevant loading rate, and should therefore provide guidance on how to assess the value of dK/dt in a relatively simple but reliable manner. Various options for measuring the loading rate have been investigated in this paper for several fracture toughness tests performed at different loading rates (quasi-static, dynamic, and impact). For each loading rate, three different toughness levels have been considered: low, medium, and high. Three considerably different materials have been selected: two RPV steels (JRQ, JSPS) and a ferritic/martensitic 9 % chromium steel (EUROFER97). It is found that the preferable option is given by the ratio between KJc and time at the onset of cleavage, whereas the elastic value Kel/tel or the average dK/dt can be used whenpartial unloadings are performed.

AB - For fracture toughness tests in the ductile-to-brittle transition region, ASTM E1921-05 requires specimens to be loaded using a loading rate dK/dt between 0.1 and 2 MPaVm/s during the initial elastic portion. It has been proposed that the standard allow testing at higher loading rates, including precracked Charpy specimens tested on an instrumented pendulum machine (impact toughness tests). The revised standard would require test results (KJc or To) to be reported along with the relevant loading rate, and should therefore provide guidance on how to assess the value of dK/dt in a relatively simple but reliable manner. Various options for measuring the loading rate have been investigated in this paper for several fracture toughness tests performed at different loading rates (quasi-static, dynamic, and impact). For each loading rate, three different toughness levels have been considered: low, medium, and high. Three considerably different materials have been selected: two RPV steels (JRQ, JSPS) and a ferritic/martensitic 9 % chromium steel (EUROFER97). It is found that the preferable option is given by the ratio between KJc and time at the onset of cleavage, whereas the elastic value Kel/tel or the average dK/dt can be used whenpartial unloadings are performed.

KW - ductile-to-brittle transition region

KW - loading rate

KW - impact toughness tests

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_101920

UR - http://knowledgecentre.sckcen.be/so2/bibref/6411

M3 - Chapter

SN - 978-0-8031-3416-4

VL - 1

SP - 54

EP - 65

BT - Fatigue and Fracture Mechanics - 36th Volume

PB - ASTM International

CY - West Conshohocken, PA, United States

ER -

ID: 117262