TY - JOUR
T1 - Grain Selection in Spiral Selectors During Investment Casting of Single-Crystal Components: Part II. Numerical Modeling
AU - Dai, HJ
AU - Dong, HB
AU - D'Souza, N
AU - Gebelin, Jean-Christophe
AU - Reed, Roger
PY - 2011/11/1
Y1 - 2011/11/1
N2 - In this article, grain selection in spiral selectors during investment casting of single-crystal (SX) components is simulated using a cellular automaton grain structure model (CAFE) within a finite element thermal model (PROCAST). The models were validated against experimental observations and then were applied to model the effect of geometry of the spiral selectors on grain selection through a systematic approach. It was found that the efficiency of the spiral selector is significantly dependent on its geometry; the spiral becomes more efficient in selecting single grain with a smaller wax wire diameter; larger spiral rotation diameter, and smaller take-off angle. Recommendations for optimizing the spiral geometry are provided.
AB - In this article, grain selection in spiral selectors during investment casting of single-crystal (SX) components is simulated using a cellular automaton grain structure model (CAFE) within a finite element thermal model (PROCAST). The models were validated against experimental observations and then were applied to model the effect of geometry of the spiral selectors on grain selection through a systematic approach. It was found that the efficiency of the spiral selector is significantly dependent on its geometry; the spiral becomes more efficient in selecting single grain with a smaller wax wire diameter; larger spiral rotation diameter, and smaller take-off angle. Recommendations for optimizing the spiral geometry are provided.
U2 - 10.1007/s11661-011-0757-1
DO - 10.1007/s11661-011-0757-1
M3 - Article
SN - 1543-1940
VL - 42A
SP - 3439
EP - 3446
JO - Metallurgical and Materials Transactions A
JF - Metallurgical and Materials Transactions A
IS - 11
ER -