FE2 Scheme for Simulation of Thermo-Mechanically Induced Phase Transformations and Residual Stresses in Ti6A14V Components
To gain a physical based understanding of the evolution of micro-scale heterogeneities and residual stresses in Ti6A14V components,a fully coupled threedimensional multi-length scale and multi-physics finite element based model is introduced. Each integration point of the macro-scale model is coupled with a periodic micro-field model providing temperature and displacement degrees of freedom on both length scales utilising a nested corotational updated Lagrangian solution scheme suitable for small-and large-strain problems. Processing conditions as they appear during forging or heat treatment for instance are applied to the macro-scale model representing the investigated component, whereas the attached micro-scale models provide the constitutive behaviour and display the microstructure evolution. The deformation gradient and temperature gradient at each macro-scale integration point are applied as boundary conditions to the spatially periodic micro-scale models in a sophisticated way to obtain the consistent stress and heat flux update via volumetric homogenisation techniques. The required macroscopic material properties are derived via a sophisticated micro-scale testing procedure.
Multi-field FE2 Ti6Al4V diffusional phase trans formation poisson point process differential johnson-mehl tessellation
B. Regener C. Krempaszky E. Werner M. Stockinger
Christian-Doppler-Laboratory of Material Mechanics of High Performance Alloys,Institute for Material Institute for Materials Science and Mechanics of Materials,Technische Universitdt Miinchen,Boltzmann BOHLER Forging GmbH & Co KG Mariazellerstraβe25,8605 Kapfenberg,Austria
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
632-636
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）