TY - JOUR
T1 - Microstructure and mechanical properties of solid state recycled 4Cr5MoSiV (H11) steel prepared by powder metallurgy
AU - Bhatta, Gyanendra
AU - De Los Santos Valladares, Luis
AU - Liu, Xinggang
AU - Ma, Zhaojun
AU - Bustamante Domínguez, A. G.
AU - Moreno, N. O.
AU - Espinoza Suarez, S. M.
AU - Barnes, C. H.W.
AU - Zhang, Deliang
N1 - Publisher Copyright:
© 2021 The Author(s)
PY - 2021/6
Y1 - 2021/6
N2 - 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.
AB - 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.
KW - Brittle fracture
KW - H11 Steel
KW - Microstructure
KW - Modified spheroidizing
KW - Solid state recycling
KW - Tensile properties
UR - http://www.scopus.com/inward/record.url?scp=85119081461&partnerID=8YFLogxK
U2 - 10.1016/j.rinma.2021.100184
DO - 10.1016/j.rinma.2021.100184
M3 - Artículo
AN - SCOPUS:85119081461
SN - 2590-048X
VL - 10
JO - Results in Materials
JF - Results in Materials
M1 - 100184
ER -