Microstructure Features and Tensile Properties of a Recent Ultra-High-Strength Steel via Two-Step Quenching and Partitioning Process

The two-step quenching and partitioning process is an excellent heat treatment regime that improves the strength and toughness of various steel alloys. This study explores the potential of developing ultra-high-strength steel with good ductility from a novel 0.37C-3.65Mn-0.65Si-0.87Al-1.5Ni-0.05P, w...

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Veröffentlicht in:Metallography, microstructure, and analysis microstructure, and analysis, 2023-08, Vol.12 (4), p.651-661
Hauptverfasser: El-Shenawy, Eman, El-Din, Hoda Nasr, Fouad, M. M. K., Refaiy, Hoda
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container_issue 4
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container_title Metallography, microstructure, and analysis
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creator El-Shenawy, Eman
El-Din, Hoda Nasr
Fouad, M. M. K.
Refaiy, Hoda
description The two-step quenching and partitioning process is an excellent heat treatment regime that improves the strength and toughness of various steel alloys. This study explores the potential of developing ultra-high-strength steel with good ductility from a novel 0.37C-3.65Mn-0.65Si-0.87Al-1.5Ni-0.05P, wt.% steel alloy through a two-step quenching and partitioning regime. The steel was produced by full austenitization followed by quenching to a temperature below the martensite start temperature (80 and 120 °C) and then partitioning at 450 °C for different durations (20 s to 180 s). The microstructure of all heat-treated specimens consisted of tempered primary martensite, bainite, retained austenite, and secondary martensite. Quenching at 80 °C for 140 s showed the highest elongation and strength elongation balance of 15% and 18.86 GPa.%, respectively, with a high ultimate tensile strength of 1245.3 MPa. The tensile properties of specimens quenched at 120 °C were lower than those quenched at 80 °C.
doi_str_mv 10.1007/s13632-023-00977-9
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subjects Alloy steels
Bainite
Characterization and Evaluation of Materials
Chemistry and Materials Science
Elongation
Heat treatment
High strength steels
Interrupted quenching
Martensite
Materials Science
Metallic Materials
Microstructure
Nanotechnology
Partitioning
Peer-Reviewed Paper
Retained austenite
Structural Materials
Surfaces and Interfaces
Tensile properties
Thin Films
Ultimate tensile strength
title Microstructure Features and Tensile Properties of a Recent Ultra-High-Strength Steel via Two-Step Quenching and Partitioning Process
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