TY - JOUR
T1 - Modelling the formation and self-healing of creep damage in iron-based alloys
AU - Versteylen, C. D.
AU - Sluiter, M. H.F.
AU - van Dijk, N. H.
PY - 2018
Y1 - 2018
N2 - A self-consistent model is applied to predict the creep cavity growth and strain rates in metals from the perspective of self-healing. In this model, the creep cavity growth rate is intricately linked to the strain rate. The self-healing process causes precipitates to grow inside creep cavities. Due to the Kirkendall effect, a diffusional flux of vacancies is induced in the direction away from the creep cavity during this selective self-healing precipitation. This process impedes the creep cavity growth. The critical stress for self-healing can be derived, and an analysis is made of the efficiency of self-healing elements in binary Fe–Cu, Fe–Au, Fe–Mo, and Fe–W alloys. Fe–Au is found to be the most efficient self-healing alloy. Fe–Mo and Fe–W alloys provide good alternatives that have the potential to be employed at high temperatures.
AB - A self-consistent model is applied to predict the creep cavity growth and strain rates in metals from the perspective of self-healing. In this model, the creep cavity growth rate is intricately linked to the strain rate. The self-healing process causes precipitates to grow inside creep cavities. Due to the Kirkendall effect, a diffusional flux of vacancies is induced in the direction away from the creep cavity during this selective self-healing precipitation. This process impedes the creep cavity growth. The critical stress for self-healing can be derived, and an analysis is made of the efficiency of self-healing elements in binary Fe–Cu, Fe–Au, Fe–Mo, and Fe–W alloys. Fe–Au is found to be the most efficient self-healing alloy. Fe–Mo and Fe–W alloys provide good alternatives that have the potential to be employed at high temperatures.
UR - http://resolver.tudelft.nl/uuid:37c49b20-a1f7-4b7b-ba6a-b8f109f0496b
UR - http://www.scopus.com/inward/record.url?scp=85049934089&partnerID=8YFLogxK
U2 - 10.1007/s10853-018-2666-9
DO - 10.1007/s10853-018-2666-9
M3 - Article
AN - SCOPUS:85049934089
SN - 0022-2461
VL - 53
SP - 14758
EP - 14773
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 20
ER -