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

Results in Materials (Jun 2021)

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

Affiliations

Gyanendra Bhatta: School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning, 110819, China; Key Laboratory of Data Analytics and Optimization for Smart Industry (Ministry of Education), Northeastern University, Shenyang, 110819, China
Luis De Los Santos Valladares: School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning, 110819, China; Key Laboratory of Data Analytics and Optimization for Smart Industry (Ministry of Education), Northeastern University, Shenyang, 110819, China; Laboratorio de Ceramicos y Nanomaterailes, Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Ap. Postal 14-0149, Lima, Peru; Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0HE, UK; Corresponding author. School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning, 110819, China.
Xinggang Liu: School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning, 110819, China
Zhaojun Ma: School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning, 110819, China
A.G. Bustamante Domínguez: Laboratorio de Ceramicos y Nanomaterailes, Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Ap. Postal 14-0149, Lima, Peru
N.O. Moreno: Departamento de Física, Universidade Federal de Sergipe, São Cristóvão, SE, 49100- 000, Brazil
S.M. Espinoza Suarez: Laboratorio de Ceramicos y Nanomaterailes, Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Ap. Postal 14-0149, Lima, Peru
C.H.W. Barnes: Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0HE, UK
Deliang Zhang: School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning, 110819, China; Key Laboratory of Data Analytics and Optimization for Smart Industry (Ministry of Education), Northeastern University, Shenyang, 110819, China; Corresponding author. School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning, 110819, China.

Journal volume & issue: Vol. 10
p. 100184

Abstract

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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.

Published in Results in Materials

ISSN: 2590-048X (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/results-in-materials

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