Understanding dual precipitation strengthening in ultra-high strength low carbon steel containing nano-sized copper precipitates and carbides

Low carbon ferritic steel alloyed with Ti, Mo and Cu was hot rolled and interrupt cooled to produce nano-sized precipitates of copper and (Ti,Mo)C carbides. The steel had a tensile strength of 840 MPa, an increase in yield strength of 380 MPa over that of the plain carbon steel and reasonable ductil...

Descripción completa

Detalles Bibliográficos
Autores principales: Phaniraj, M. P., Shin, Young-Min, Jung, Woo-Sang, Kim, Man-Ho, Choi, In-Suk
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Singapore 2017
Materias:
Research
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5494287/
https://www.ncbi.nlm.nih.gov/pubmed/28729961
http://dx.doi.org/10.1186/s40580-017-0110-5
Descripción
Sumario:Low carbon ferritic steel alloyed with Ti, Mo and Cu was hot rolled and interrupt cooled to produce nano-sized precipitates of copper and (Ti,Mo)C carbides. The steel had a tensile strength of 840 MPa, an increase in yield strength of 380 MPa over that of the plain carbon steel and reasonable ductility. Transmission electron microscopy and small angle neutron scattering were used to characterize size and volume fraction of the precipitates in the steels designed to form only copper precipitates and only (Ti,Mo)C carbides. The individual and combined precipitation strengthening contributions was calculated using the size and volume fraction of precipitates and compared with the measured values. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s40580-017-0110-5) contains supplementary material, which is available to authorized users.

Ejemplares similares