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Corrosion Inhibition in Maraging Steel: A Review
Published in P. C. Thomas, Vishal John Mathai, Geevarghese Titus, Emerging Technologies for Sustainability, 2020
Betsy Devasia, Rose J. Mattathil, K. Sreekumar
Maraging steel is widely used in the aircraft landing gear, helicopter undercarriages, rocket motor cases, etc due to its unique high strength-to-weight ratio. Maraging steel offers an unusual combination of high tensile strength and high fracture toughness unlike most of the high-strength steel which exhibits low toughness. This rare combination of high strength and toughness in maraging steel makes it a suitable candidate for safetycritical aircraft structures that require high strength and damage tolerance. Another unique feature of this material is its thermal stability. During heat treatment, such that finished components in standard condition can be aged to final properties and no further surface machining needed. However, maraging steel has Poor corrosion resistance. They are prone to the attack in the corrosive medium.
Special Steels
Published in Bankim Chandra Ray, Rajesh Kumar Prusty, Deepak Nayak, Phase Transformations and Heat Treatments of Steels, 2020
Bankim Chandra Ray, Rajesh Kumar Prusty, Deepak Nayak
Maraging steels are highly alloyed and low-carbon iron–nickel martensites that offer an excellent combination of strength, ductility, and toughness. These are mostly used for aerospace applications. Because of low carbon content, the martensite formed is soft with about 30 HRc. Hence, age hardening is done to strengthen the steel further. The composition of maraging steels is so chosen that lath martensite forms upon cooling the steel down to the room temperature. It is because lath martensite has several dislocations that are uniformly distributed and hence support age hardening by providing several preferred nucleation sites for the intermetallic compounds to precipitate. Besides, lath martensites provide favorite diffusion paths for substitutional solute atoms during aging. The Ms temperature of such types of steels is kept high around 200°C–300°C to avoid the formation of retained austenite. In some cases, nitriding of maraging steels is done to induce hardness of about 60–70 HRc up to a depth of 0.15 mm.
High Alloy Steels
Published in P. C. Angelo, B. Ravisankar, Introduction to Steels, 2019
Maraging steels have ultra-high strength combined with high ductility and high fracture toughness. Further, the strength of the maraging steels can be increased by cold working and subsequent aging. This type of process is called marforming. The maraging steels have good impact, fatigue, and fracture toughness. The impact fatigue limit of maraging steels ranges from 400 to 500 MPa.
Influence of different build orientation and laser scan strategies on surface quality, Mechanical and Material Characteristics of 18 Ni-300 maraging steel processed through DMLS
Published in Australian Journal of Mechanical Engineering, 2023
Satish Prakash Karlapudy, T. Nancharaiah, V. V. Subba Rao
18Ni-300 maraging steel belongs to a unique class of ultra-high resistance, low carbon steels which, other than the shape of intermetallic alloys that can avoid the motion of interruption in the component, can improve their high strength (Becker and Dimitrov 2016; Demir and Previtali 2017). Maraging steels are used for large heavy-duty applications in aerospace, automotive aircraft, tool and die industries such as landing gears, shafts, conformal cooling channels, and fasteners (Casalino et al. 2015; Kempen et al. 2011). In their as-built state, the mechanical properties of the maraging steels are comparatively lower. Furthermore, precipitation hardening of intermetallic compounds can achieve better mechanical characteristics by ageing heat treatment (Tan et al. 2017b).
Acoustic emission data classification of 18 percent Ni maraging steel 250 specimens during tensile deformation
Published in Nondestructive Testing and Evaluation, 2023
Gowrishankar Wuriti, Somnath Chattopadhyaya, Tessy Thomas, Sridhar Wuriti
AE signal data generation, classification and prediction of a Maraging steel failure using AE data is are not yet reported. Maraging steel has a potential use in aerospace industry due to its high specific strength with realisable manufacturability unlike other steels. AE parameter generation on Maraging steels is of an industrial significance and has potential applicability in Rockets and Launch vehicle applications.