Microstructure and mechanical properties of low nickel maraging steel
Data(s) |
28/02/2012
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Resumo |
Austenitization with lower temperature and intercritical annealing were introduced in the treatment of a maraging steel with a composition of Fe–12.94Ni–1.61Al–1.01Mo–0.23Nb (wt.%). Scanning electron microscopy was employed to study the microstructure after austenitization at 950 °C and intercritical annealing, followed by aging at 485 and 600 °C. X-ray diffraction (XRD) analysis was applied to evaluate the formation of retained or reverted austenite. Thermodynamic calculation was employed to calculate equilibrium phase mole fractions. Hardness and Charpy impact toughness of the steel were measured. Intercritical annealing treatments did not result in significant increase of hardness either before or after aging. The Charpy impact toughness of the alloy in aged condition was enhanced after austenitization at 950 °C. No austenite was observed in XRD. However, suspected reverted austenite was found after austenitization at 950 °C followed by aging at 600 °C for 4 h. Relationships among heat treatment, microstructure and mechanical properties are discussed. |
Identificador | |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/restrictedAccess |
Fonte |
Sha , W , Ye , A , Malinov , S & Wilson , E 2012 , ' Microstructure and mechanical properties of low nickel maraging steel ' Materials Science and Engineering: A , vol 536 , pp. 129-135 . DOI: 10.1016/j.msea.2011.12.086 |
Palavras-Chave | #Mechanical properties #Steel #Aging #Fracture #Heat treatment #Phase transformations #/dk/atira/pure/subjectarea/asjc/2500 #Materials Science(all) #/dk/atira/pure/subjectarea/asjc/3100/3104 #Condensed Matter Physics #/dk/atira/pure/subjectarea/asjc/2200/2210 #Mechanical Engineering #/dk/atira/pure/subjectarea/asjc/2200/2211 #Mechanics of Materials |
Tipo |
article |