TY - JOUR
T1 - A multiscale constitutive model for intergranular stress corrosion cracking in type 304 austenitic stainless steel
AU - Siddiq, A
AU - Rahimi, S
PY - 2013/7/17
Y1 - 2013/7/17
N2 - Intergranular stress corrosion cracking (IGSCC) is a fracture mechanism in sensitised austenitic stainless steels exposed to critical environments where the intergranular cracks extends along the network of connected susceptible grain boundaries. A constitutive model is presented to estimate the maximum intergranular crack growth by taking into consideration the materials mechanical properties and microstructure characters distribution. This constitutive model is constructed based on the assumption that each grain is a two phase material comprising of grain interior and grain boundary zone. The inherent micro-mechanisms active in the grain interior during IGSCC is based on crystal plasticity theory, while the grain boundary zone has been modelled by proposing a phenomenological constitutive model motivated from cohesive zone modelling approach. Overall, response of the representative volume is calculated by volume averaging of individual grain behaviour. Model is assessed by performing rigorous parametric studies, followed by validation and verification of the proposed constitutive model using representative volume element based FE simulations reported in the literature. In the last section, model application is demonstrated using intergranular stress corrosion cracking experiments which shows a good agreement.
AB - Intergranular stress corrosion cracking (IGSCC) is a fracture mechanism in sensitised austenitic stainless steels exposed to critical environments where the intergranular cracks extends along the network of connected susceptible grain boundaries. A constitutive model is presented to estimate the maximum intergranular crack growth by taking into consideration the materials mechanical properties and microstructure characters distribution. This constitutive model is constructed based on the assumption that each grain is a two phase material comprising of grain interior and grain boundary zone. The inherent micro-mechanisms active in the grain interior during IGSCC is based on crystal plasticity theory, while the grain boundary zone has been modelled by proposing a phenomenological constitutive model motivated from cohesive zone modelling approach. Overall, response of the representative volume is calculated by volume averaging of individual grain behaviour. Model is assessed by performing rigorous parametric studies, followed by validation and verification of the proposed constitutive model using representative volume element based FE simulations reported in the literature. In the last section, model application is demonstrated using intergranular stress corrosion cracking experiments which shows a good agreement.
KW - multiscale modelling
KW - stress corrosion
KW - fracture analysis
KW - crystal plasticity theory
KW - cohesive model
UR - http://www.scopus.com/inward/record.url?scp=84883069619&partnerID=8YFLogxK
UR - https://iopscience.iop.org/journal/1742-6596
U2 - 10.1088/1742-6596/451/1/012022
DO - 10.1088/1742-6596/451/1/012022
M3 - Article
SN - 1742-6596
VL - 451
JO - Journal of Physics Conference Series
JF - Journal of Physics Conference Series
IS - conference 1
M1 - 012022
ER -