TY - JOUR
T1 - Investigating gas-phase defect formation in late-stage solidification using a novel phase-field crystal alloy model
AU - Wang, Nan
AU - Smith, Nathan
AU - Provatas, Nikolas
N1 - Publisher Copyright:
© 2017 American Physical Society.
PY - 2017/9/28
Y1 - 2017/9/28
N2 - We study late-stage solidification and the associated formation of defects in alloy materials using a novel model based on the phase-field-crystal technique. It is shown that our model successfully captures several important physical phenomena that occur in the late stages of solidification, including solidification shrinkage, liquid cavitation and microsegregation, all in a single framework. By examining the interplay of solidification shrinkage and solute segregation, this model reveals that the formation of gas pore defects at the late stage of solidification can lead to nucleation of second phase solid particles due to solute enrichment in the eutectic liquid driven by gas-phase nucleation and growth. We also predict a modification of the Gulliver-Scheil equation in the presence of gas pockets in confined liquid pools.
AB - We study late-stage solidification and the associated formation of defects in alloy materials using a novel model based on the phase-field-crystal technique. It is shown that our model successfully captures several important physical phenomena that occur in the late stages of solidification, including solidification shrinkage, liquid cavitation and microsegregation, all in a single framework. By examining the interplay of solidification shrinkage and solute segregation, this model reveals that the formation of gas pore defects at the late stage of solidification can lead to nucleation of second phase solid particles due to solute enrichment in the eutectic liquid driven by gas-phase nucleation and growth. We also predict a modification of the Gulliver-Scheil equation in the presence of gas pockets in confined liquid pools.
UR - http://www.scopus.com/inward/record.url?scp=85039460672&partnerID=8YFLogxK
U2 - 10.1103/PhysRevMaterials.1.043405
DO - 10.1103/PhysRevMaterials.1.043405
M3 - 文章
AN - SCOPUS:85039460672
SN - 2475-9953
VL - 1
JO - Physical Review Materials
JF - Physical Review Materials
IS - 4
M1 - 043405
ER -