Para acceder a los documentos con el texto completo, por favor, siga el siguiente enlace: http://hdl.handle.net/2117/104360

Título:	Twin-induced plasticity of an ECAP-processed TWIP steel
Autor/a:	Wang, Liang; Benito Páramo, José Antonio; Calvo Muñoz, Jessica; Cabrera Marrero, José M.
Otros autores:	Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics
Abstract:	The TWIP steels show high strain hardening rates with high ductility which results in high ultimate tensile strength. This makes their processing by equal channel angular pressing very difficult. Up to now, this has only been achieved at warm temperatures (above 200 °C). In this paper, a FeMnCAl TWIP steel has been processed at room temperature and the resulted microstructure and mechanical properties were investigated. For comparison, the material has also been processed at 300 °C. The TWIP steel processed at room temperature shows a large increase in yield strength (from 590 in the annealed condition to 1295 MPa) and the ultimate tensile strength (1440 MPa) as a consequence of a sharp decrease in grain size and the presence within the grains of a high density of mechanical twins and subgrains. This dense microstructure results also in a loss of strain hardening and a reduction in ductility. The material processed at 300 °C is more able to accommodate deformation and has lower reduction in grain size although there is a significant presence of mechanical twins and subgrains produced by dislocation activity. This material reaches an ultimate tensile strength of 1400 MPa with better ductility than the room temperature material.
Materia(s):	-Àrees temàtiques de la UPC::Enginyeria dels materials -Steel -Materials--Mechanical properties -ECAP -EBSD -mechanical properties -twins -TWIP steels -Acer -Materials
Derechos:	Attribution 3.0 Spain http://creativecommons.org/licenses/by/3.0/es/
Tipo de documento:	Artículo - Versión publicada Artículo
Compartir:

Mostrar el registro completo del ítem