Nanoengineered Hypereutectoid Steel with Superior Hardness and Wear Resistance

Journal Article · Mon Apr 01 04:00:00 EDT 2019 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-019-03995-3· OSTI ID:22970841

Salloom, Riyadh ^[1]; Ayyagari, Aditya V. ^[2]; Mukherjee, Sundeep ^[1]

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1. University of North Texas, Department of Materials Science and Engineering (United States)
2. Argonne National Laboratory, Center for Nanoscale Materials (United States)

Hypereutectoid SAE 52100 steel is extensively used in bearing applications. Microstructure modification in terms of dislocation martensite and carbide refinement was achieved for SAE 52100 steel through a simple duplex heat treatment. Refinement of prior austenite grains to less than 5 μm resulted in the conversion of conventional high-carbon twinned martensite to dislocation martensite. The concurrent refinement of austenite grains and carbide precipitates was accomplished by high-temperature austenitization followed by low-temperature tempering. This resulted in nanoscale nonstoichiometric ε-carbides within a heavily twinned martensitic structure. These nanoscale carbides acted as grain boundary pinning agents after their transformation to θ-carbides during the final austenitization process. The resulting microstructure was characterized by a fine dispersion of θ-carbides within dislocation martensite and showed roughly 24% increase in tensile strength and 30% better wear resistance compared to conventional structure.

• OSTI ID: 22970841
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 4 Vol. 28; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
CARBIDES
CRYSTAL LATTICES
DISLOCATIONS
GRAIN BOUNDARIES
GRAIN REFINEMENT
M CONVERSION
MARTENSITE
MARTENSITIC STEELS
TENSILE PROPERTIES
WEAR RESISTANCE