Evaluation of stress corrosion cracking susceptibility of austenitic stainless steels in CaCl2 solution by the constant load method

Heikki Leinonen

Research output: Book/ReportReport

Abstract

Stress corrosion cracking susceptibility of austenitic stainless steels in CaCl2 solutions was studied using a constant load method. Initiation and propagation of stress corrosion cracks were examined with fractography. The number and distribution of cracks were classified. A model for mechanical response of the specimen under constant load testing and a physical model for cracking was introduced, and some creep deformation measurements were performed and analysed. The steady state strain rate obtained from the corrosion elongation curve (elongation vs. time curve) showed a linear function of time to failure. This implies that the steady state strain rate can be applied as a parameter for prediction of time to failure. The steady state strain rate below which no failure occurs within a laboratory time scale was estimated. On the basis of the results obtained, the critical values of stress below which no SCC occurs are evaluated. Based on creep measurements in a non-corrosive environment the influence of the environment on the steady state strain rate is more than five-fold. Cracking characteristics were divided into three categories according to the crack initiation distribution. Fractography showed that the cracking mode changed from transgranular to intergranular cracks and then to ductile dimpled fracture. Transgranular cracking predominates at relatively low stresses and steady state strain rates.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages58
ISBN (Print)951-38-4762-4
Publication statusPublished - 1995
MoE publication typeNot Eligible

Publication series

SeriesVTT Publications
Number224
ISSN1235-0621

Fingerprint

Stress corrosion cracking
Austenitic stainless steel
Strain rate
Fractography
Cracks
Elongation
Creep
Corrosion
Load testing
Ductile fracture
Crack initiation
Loads (forces)

Keywords

  • stress corrosion cracking
  • austenite
  • stainless steels
  • corrosion
  • calcium chlorides
  • solutions

Cite this

Leinonen, H. (1995). Evaluation of stress corrosion cracking susceptibility of austenitic stainless steels in CaCl2 solution by the constant load method. Espoo: VTT Technical Research Centre of Finland. VTT Publications, No. 224
Leinonen, Heikki. / Evaluation of stress corrosion cracking susceptibility of austenitic stainless steels in CaCl2 solution by the constant load method. Espoo : VTT Technical Research Centre of Finland, 1995. 58 p. (VTT Publications; No. 224).
@book{1b620fb0e0c04304bf1b9f137327f227,
title = "Evaluation of stress corrosion cracking susceptibility of austenitic stainless steels in CaCl2 solution by the constant load method",
abstract = "Stress corrosion cracking susceptibility of austenitic stainless steels in CaCl2 solutions was studied using a constant load method. Initiation and propagation of stress corrosion cracks were examined with fractography. The number and distribution of cracks were classified. A model for mechanical response of the specimen under constant load testing and a physical model for cracking was introduced, and some creep deformation measurements were performed and analysed. The steady state strain rate obtained from the corrosion elongation curve (elongation vs. time curve) showed a linear function of time to failure. This implies that the steady state strain rate can be applied as a parameter for prediction of time to failure. The steady state strain rate below which no failure occurs within a laboratory time scale was estimated. On the basis of the results obtained, the critical values of stress below which no SCC occurs are evaluated. Based on creep measurements in a non-corrosive environment the influence of the environment on the steady state strain rate is more than five-fold. Cracking characteristics were divided into three categories according to the crack initiation distribution. Fractography showed that the cracking mode changed from transgranular to intergranular cracks and then to ductile dimpled fracture. Transgranular cracking predominates at relatively low stresses and steady state strain rates.",
keywords = "stress corrosion cracking, austenite, stainless steels, corrosion, calcium chlorides, solutions",
author = "Heikki Leinonen",
note = "Project code: VAL1701",
year = "1995",
language = "English",
isbn = "951-38-4762-4",
series = "VTT Publications",
publisher = "VTT Technical Research Centre of Finland",
number = "224",
address = "Finland",

}

Leinonen, H 1995, Evaluation of stress corrosion cracking susceptibility of austenitic stainless steels in CaCl2 solution by the constant load method. VTT Publications, no. 224, VTT Technical Research Centre of Finland, Espoo.

Evaluation of stress corrosion cracking susceptibility of austenitic stainless steels in CaCl2 solution by the constant load method. / Leinonen, Heikki.

Espoo : VTT Technical Research Centre of Finland, 1995. 58 p. (VTT Publications; No. 224).

Research output: Book/ReportReport

TY - BOOK

T1 - Evaluation of stress corrosion cracking susceptibility of austenitic stainless steels in CaCl2 solution by the constant load method

AU - Leinonen, Heikki

N1 - Project code: VAL1701

PY - 1995

Y1 - 1995

N2 - Stress corrosion cracking susceptibility of austenitic stainless steels in CaCl2 solutions was studied using a constant load method. Initiation and propagation of stress corrosion cracks were examined with fractography. The number and distribution of cracks were classified. A model for mechanical response of the specimen under constant load testing and a physical model for cracking was introduced, and some creep deformation measurements were performed and analysed. The steady state strain rate obtained from the corrosion elongation curve (elongation vs. time curve) showed a linear function of time to failure. This implies that the steady state strain rate can be applied as a parameter for prediction of time to failure. The steady state strain rate below which no failure occurs within a laboratory time scale was estimated. On the basis of the results obtained, the critical values of stress below which no SCC occurs are evaluated. Based on creep measurements in a non-corrosive environment the influence of the environment on the steady state strain rate is more than five-fold. Cracking characteristics were divided into three categories according to the crack initiation distribution. Fractography showed that the cracking mode changed from transgranular to intergranular cracks and then to ductile dimpled fracture. Transgranular cracking predominates at relatively low stresses and steady state strain rates.

AB - Stress corrosion cracking susceptibility of austenitic stainless steels in CaCl2 solutions was studied using a constant load method. Initiation and propagation of stress corrosion cracks were examined with fractography. The number and distribution of cracks were classified. A model for mechanical response of the specimen under constant load testing and a physical model for cracking was introduced, and some creep deformation measurements were performed and analysed. The steady state strain rate obtained from the corrosion elongation curve (elongation vs. time curve) showed a linear function of time to failure. This implies that the steady state strain rate can be applied as a parameter for prediction of time to failure. The steady state strain rate below which no failure occurs within a laboratory time scale was estimated. On the basis of the results obtained, the critical values of stress below which no SCC occurs are evaluated. Based on creep measurements in a non-corrosive environment the influence of the environment on the steady state strain rate is more than five-fold. Cracking characteristics were divided into three categories according to the crack initiation distribution. Fractography showed that the cracking mode changed from transgranular to intergranular cracks and then to ductile dimpled fracture. Transgranular cracking predominates at relatively low stresses and steady state strain rates.

KW - stress corrosion cracking

KW - austenite

KW - stainless steels

KW - corrosion

KW - calcium chlorides

KW - solutions

M3 - Report

SN - 951-38-4762-4

T3 - VTT Publications

BT - Evaluation of stress corrosion cracking susceptibility of austenitic stainless steels in CaCl2 solution by the constant load method

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Leinonen H. Evaluation of stress corrosion cracking susceptibility of austenitic stainless steels in CaCl2 solution by the constant load method. Espoo: VTT Technical Research Centre of Finland, 1995. 58 p. (VTT Publications; No. 224).