Microstructure and mechanical properties of solid state recycled 4Cr5MoSiV (H11) steel prepared by powder metallurgy

Gyanendra Bhatta, Luis De Los Santos Valladares, Xinggang Liu, Zhaojun Ma, A. G. Bustamante Domínguez, N. O. Moreno, S. M. Espinoza Suarez, C. H.W. Barnes, Deliang Zhang

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

3 Citas (Scopus)

Resumen

4Cr5MoSiV (H11) steel machining chips were crushed to a powder and then consolidated into discs by hot pressing under various consolidation parameters. The discs were subjected to modified spheroidizing annealing treatment, and their evolved microstructure, tensile mechanical properties and fracture behavior were studied. The microstructure consisted of α−Fe as a matrix, together with heterogeneously distributed non metallic inclusions from the chip-crushing step and precipitated secondary phases. The yield strength, fracture strength and elongation to fracture of the consolidated discs were determined to be in the range of 215∼264 ​MPa, 344∼415 ​MPa and 1.2∼2.6%, respectively. The strength of the recycled H11 steel was comparable with that of the ingot metallurgy (IM) H11 steel, but the tensile ductility of the former was significantly lower than that of the latter, being mainly caused by the fracture of the non-metallic inclusions along with the hard secondary phase particles in the IM H11 steel which leads to premature fracture of the samples. The Vickers hardness of the samples were in the range of 144∼194 HV being comparable to that of the IM counterpart. Factographs of the fracture surface demonstrated that the tensile test specimens fractured in a brittle fracture mode.

Idioma originalInglés
Número de artículo100184
PublicaciónResults in Materials
Volumen10
DOI
EstadoPublicada - jun. 2021
Publicado de forma externa

Nota bibliográfica

Publisher Copyright:
© 2021 The Author(s)

Huella

Profundice en los temas de investigación de 'Microstructure and mechanical properties of solid state recycled 4Cr5MoSiV (H11) steel prepared by powder metallurgy'. En conjunto forman una huella única.

Citar esto