Damage healing in steel parts enables them to be reused again without going through the conventional metal recycling/remelting process, thus damage healing is a process with potential for reclaiming products while causing less environmental damage, that is, improving resource efficiency. In this paper, damage healing of a porous free cutting steel during a hot flat rolling process has been investigated. A UMAT subroutine incorporating damage healing models has been utilised which includes two stages: void closure and diffusion bonding. The developed UMAT subroutine captures evolution of void volume fraction (vvf) as a result of plastic compression, to model the void closure process and predict the subsequent healing time. Effects of roll gap geometry factor (RGF), initial porosity size (void volume fraction) on porosity elimination during rolling have been investigated.
|Number of pages||7|
|Publication status||Published - 4 Sept 2020|
|Event||18th International Conference Metal Forming 2020|
- Krakow, Poland
Duration: 13 Sept 2020 → 16 Sept 2020