(Institución)

Digital.CSIC > Ciencia y Tecnología de Materiales > Centro Nacional de Investigaciones Metalúrgicas (CENIM) > (CENIM) Artículos >

Compartir

EndNote

Impacto

Enlaces

Registro de acceso cerrado Nanoscale austenite reversion through partitioning, segregation and kinetic freezing: Example of a ductile 2 GPa Fe–Cr–C steel

Autor :Yuan, L.
Ponge, D.
Wittig, J.
Choi, P.
Jiménez, José Antonio
Raabe, D.
Palabras clave :Austenite reversion, Partitioning, Diffusion, Strength, Ductility
Fecha de publicación :2012
Editor:Elsevier
Citación :Acta Materialia 60(6-7) : 2790-2804 (2012)
Resumen:Austenite reversion during tempering of a Fe–13.6 Cr–0.44 C (wt.%) martensite results in an ultra-high-strength ferritic stainless steel with excellent ductility. The austenite reversion mechanism is coupled to the kinetic freezing of carbon during low-temperature partitioning at the interfaces between martensite and retained austenite and to carbon segregation at martensite–martensite grain boundaries. An advantage of austenite reversion is its scalability, i.e. changing tempering time and temperature tailors the desired strength–ductility profiles (e.g. tempering at 400 °C for 1 min produces a 2 GPa ultimate tensile strength (UTS) and 14% elongation while 30 min at 400 °C results in a UTS of ∼1.75 GPa with an elongation of 23%). The austenite reversion process, carbide precipitation and carbon segregation have been characterized by X-ray diffraction, electron back-scatter diffraction, transmission electron microscopy and atom probe tomography in order to develop the structure–property relationships that control the material’s strength and ductility.
Versión del editor:http://dx.doi.org/10.1016/j.actamat.2012.01.045
URI :http://hdl.handle.net/10261/57295
ISSN:1359-6454
DOI:10.1016/j.actamat.2012.01.045
Aparece en las colecciones: (CENIM) Artículos

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.