TY - GEN
T1 - Process simulation of cold pressing and sintering of armstrong CP-Ti powders
AU - Gorti, Sarma B.
AU - Sabau, Adrian S.
AU - Peter, William H.
AU - Nunn, Stephen D.
AU - Yamamoto, Yukinori
AU - Chen, Wei
PY - 2011
Y1 - 2011
N2 - A computational methodology is presented for the process simulation of cold pressing and sintering of Armstrong CP-Ti powders. Since the powder consolidation is governed by specific pressure-dependent constitutive equations, solution algorithms were developed for the ABAQUS user material subroutine, UMAT, for computing the plastic strain increments based on an implicit integration of the nonlinear yield function, flow rule, and hardening equations. Sintering was simulated using a model based on diffusional creep using the user subroutine CREEP. The initial mesh, stress, and density for the simulation of sintering were obtained from the results of the cold pressing simulation, minimizing the errors from decoupling the cold pressing and sintering simulations. Numerical simulation results are presented for the cold compaction followed by a sintering step of the Ti powders. The numerical simulation results for the relative density were compared to those measured from experiments before and after sintering, showing that the relative density can be accurately predicted.
AB - A computational methodology is presented for the process simulation of cold pressing and sintering of Armstrong CP-Ti powders. Since the powder consolidation is governed by specific pressure-dependent constitutive equations, solution algorithms were developed for the ABAQUS user material subroutine, UMAT, for computing the plastic strain increments based on an implicit integration of the nonlinear yield function, flow rule, and hardening equations. Sintering was simulated using a model based on diffusional creep using the user subroutine CREEP. The initial mesh, stress, and density for the simulation of sintering were obtained from the results of the cold pressing simulation, minimizing the errors from decoupling the cold pressing and sintering simulations. Numerical simulation results are presented for the cold compaction followed by a sintering step of the Ti powders. The numerical simulation results for the relative density were compared to those measured from experiments before and after sintering, showing that the relative density can be accurately predicted.
UR - http://www.scopus.com/inward/record.url?scp=79960591051&partnerID=8YFLogxK
U2 - 10.1002/9781118062111.ch54
DO - 10.1002/9781118062111.ch54
M3 - Conference contribution
AN - SCOPUS:79960591051
SN - 9781118029459
T3 - TMS Annual Meeting
SP - 483
EP - 490
BT - Materials Processing and Energy Materials
PB - Minerals, Metals and Materials Society
ER -