TY  - JOUR
AU  - Wang, Kai
AU  - Weikamp, Marc
AU  - Lin, Mingxuan
AU  - Zimmermann, Carina
AU  - Schwaiger, Ruth
AU  - Prahl, Ulrich
AU  - Hunkel, Martin
AU  - Spatschek, Robert
TI  - Influence of interface proximity on precipitation thermodynamics
JO  - Metals
VL  - 10
IS  - 10
SN  - 2075-4701
CY  - Basel
PB  - MDPI
M1  - FZJ-2020-03228
SP  - 1292 -
PY  - 2020
AB  - The formation of coherent precipitates is often accompanied by large elastic mismatch stresses, which suppress phase separation. We discuss the presence of interfaces as a mechanism for stress relaxation, which can lead to preferred zones of precipitation. In particular, we discuss the proximity of free surfaces and shear-coupled grain boundaries, for which we can obtain a substantial local energy reduction and predict the influence on the local precipitation thermodynamics. The latter case is accompanied by morphological changes of the grain boundary, which are less suitable for large-scale descriptions. For that purpose, we develop an effective description through an elastic softening inside the grain boundary and map the microscopic grain boundary relaxation to a mesoscopic elastic and phase field model, which also allows generalizing the description to multi-phase situations.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000586909000001
DO  - DOI:10.3390/met10101292
UR  - https://juser.fz-juelich.de/record/884734
ER  -