Influence of Cooling Process Routes after Intercritical Annealing on Impact Toughness of Duplex Type Medium Mn Steel
| Autor: | Hikaru Tanino, Koh-ichi Sugimoto |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
microstructure 0211 other engineering and technologies Charpy impact test tensile property heat treatment reverted austenite impact toughness duplex type medium Mn steel 02 engineering and technology Ultimate tensile strength General Materials Science Composite material 021102 mining & metallurgy Austenite Mining engineering. Metallurgy Metals and Alloys TN1-997 Stamping 021001 nanoscience & nanotechnology Microstructure Isothermal transformation diagram Volume fraction Elongation 0210 nano-technology |
| Zdroj: | Metals, Vol 11, Iss 1143, p 1143 (2021) Metals; Volume 11; Issue 7; Pages: 1143 |
| ISSN: | 2075-4701 |
| Popis: | To apply the duplex type low-carbon medium-manganese steel to the hot/warm-forging and -stamping products, the influence of cooling process routes immediately after intercritical annealing such as air-cooling (AC) and isothermal transformation (IT) processes on the impact toughness of 0.2%C-1.5%Si-5%Mn (in mass %) duplex type medium-Mn (D-MMn) steel was investigated. Moreover the microstructural and tensile properties were also investigated. The AC process increased the volume fraction of reverted austenite but decreased the thermal and mechanical stability in the D-MMn steel, compared to the IT process. The AC process increased the tensile strength but decreased the total elongation. The Charpy V-notch impact value and ductile-brittle transition temperature were deteriorated by the AC process, compared to the IT process. This deterioration of the impact toughness was mainly related to the reverted austenite characteristics and fracture mode. |
| Databáze: | OpenAIRE |
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