The Effect of a Two-Stage Heat-Treatment on the Microstructural and Mechanical Properties of a Maraging Steel
| Autor: | Simm, Thomas Hadfield, Sun, Lin, Galvin, Deri Rhys, Hill, Paul, Rawson, Martin, Birosca, Soran, Gilbert, Elliot Paul, Bhadeshia, Harshad, Perkins, Karen |
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| Přispěvatelé: | Bhadeshia, Harshad [0000-0002-2818-5743], Apollo - University of Cambridge Repository |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
maraging steel
Small angle neutron scattering small angle neutron scattering lcsh:Technology Article creep Laves phase Materials Science(all) EP/H022309/1 Ductile to brittle transition temperature NiAl lcsh:Microscopy lcsh:QC120-168.85 ductile to brittle transition temperature lcsh:QH201-278.5 lcsh:T Maraging steel RCUK EP/H500383/1 Creep EPSRC precipitation strengthening Atom probe tomography Precipitation strengthening atom probe tomography lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics Strength lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) strength lcsh:TK1-9971 |
| Zdroj: | Materials Materials, Vol 10, Iss 12, p 1346 (2017) Simm, T H, Sun, L, Galvin, D R, Hill, P, Rawson, M, Birosca, S, Gilbert, E P, Bhadeshia, H & Perkins, K 2017, ' The effect of a two-stage heat-treatment on the microstructural and mechanical properties of a maraging steel ', Materials, vol. 10, no. 12, 1346 . https://doi.org/10.3390/ma10121346 |
| ISSN: | 1996-1944 |
| Popis: | Maraging steels gain many of their beneficial properties from heat treatments which induce the precipitation of intermetallic compounds. We consider here a two-stage heat-treatment, first involving austenitisation, followed by quenching to produce martensite and then an ageing treatment at a lower temperature to precipitation harden the martensite of a maraging steel. It is shown that with a suitable choice of the initial austenitisation temperature, the steel can be heat treated to produce enhanced toughness, strength and creep resistance. A combination of small angle neutron scattering, scanning electron microscopy, electron back-scattered diffraction, and atom probe tomography were used to relate the microstructural changes to mechanical properties. It is shown that such a combination of characterisation methods is necessary to quantify this complex alloy, and relate these microstructural changes to mechanical properties. It is concluded that a higher austenitisation temperature leads to a greater volume fraction of smaller Laves phase precipitates formed during ageing, which increase the strength and creep resistance but reduces toughness. The current research was funded by the EPSRC Rolls-Royce Strategic Partnership in Structural Metallic Systems for Gas Turbines (grants EP/H500383/1 and EP/H022309/1). The provision of materials and technical support from Rolls-Royce plc is gratefully acknowledged. |
| Databáze: | OpenAIRE |
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