|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Ultrafine Grained Materials IX
||X-9: Mechanical and Microstructural Properties of Commercial Twinning-induced Plasticity (TWIP) Steel Processed by High-pressure Torsion (HPT)
||Jung Gi Kim, Byoung Ho Park, Ho Yong Um, Dong Jun Lee, Sunghak Lee, Hyoung Seop Kim
|On-Site Speaker (Planned)
||Jung Gi Kim
Commercial twinning-induced plasticity (TWIP) steels show excellent tensile strength and elongation due to the formation of deformation twinning during plastic deformation. TWIP steels become one of the candidates for a nano-twinned metallic material using severe plastic deformation. High-pressure torsion (HPT) can induce extremely large amount of shear strain, hence, the strength of TWIP steels is expected to be dramatically enhanced with the number of HPT rotations. It is found that the deformation twinning is developed well in the early stage of the shear deformation, but saturated and annihilated after 1/2 turn. The microstructural results also represent the deformation twinning in the early stage of deformation, and the transform to the nanostructured grain to accommodate the intense plastic strain. However, the elongation of the HPT processed TWIP steel significantly decreased due to the accumulated dislocations as the shear deformation increases.
This presentation is applied for Young Scientist Best Oral Presentation.