Double-action Die Compaction of Fe-Al Composite Powder- A Study by MPFEM Simulation
Jun-Wei Li, Xi-Zhong An
Available Online April 2017.
- https://doi.org/10.2991/ame-17.2017.21How to use a DOI?
- MPFEM modeling, particulate scale simulation, Fe and Al composite powders, double-action die compaction, densification mechanism
- To identify the densification process and corresponding mechanism, double-action die compaction of Fe-Al composite powder (with 20 wt.% Al) was modeled by multi-particle finite element method (MPFEM) from particulate scale in 2D. The initial packing structure generated by discrete element method (DEM) was input into FEM model where the mesh division of each particle was discretized. During compaction, macro and micro properties of the compacts were characterized and compared with those from single-action die compaction. The results show that with the same initial packing structure, double-action compaction can create dense compact with more uniform stress and relative density distributions at relatively low pressure. Densification mechanism analyses indicate that double-action compaction can more effectively improve the particle rearrangement to realize the dense packing structure compared with single action compaction when the pressure is low, in the former case large voids or pores have almost been eliminated, which is the precondition for the formation of high quality compact. With the increase of the pressure, further rearrangement and elastic and plastic deformation of Fe and Al particles can be observed; in this stage, the densification is mainly due to the plastic deformation of Al particles to fill their adjacent interstices. At high pressure, the compact shows bulk behavior, and some isolated enclosed pores are remained in the final compact. MPFEM simulation demonstrates that the final compact obtained in double-action compaction shows lower stresses/contact forces, and the stress distribution and particle deformation are more uniform.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Jun-Wei Li AU - Xi-Zhong An PY - 2017/04 DA - 2017/04 TI - Double-action Die Compaction of Fe-Al Composite Powder- A Study by MPFEM Simulation BT - 3rd Annual International Conference on Advanced Material Engineering (AME 2017) PB - Atlantis Press SN - 2352-5401 UR - https://doi.org/10.2991/ame-17.2017.21 DO - https://doi.org/10.2991/ame-17.2017.21 ID - Li2017/04 ER -