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Meeting Materials Science & Technology 2020
Symposium Metallurgy and Magnetism
Presentation Title Magnetic Performance of Gas-atomized Maraging Steel Powders
Author(s) Ganesh Varma Thotakura, Ramasis Goswami, Tanjore V. Jayaraman
On-Site Speaker (Planned) Tanjore V. Jayaraman
Abstract Scope Maraging steels are traditional ultra-high-strength structural alloys prominent in hydrospace and aerospace applications. We evaluated the magnetic performance and properties of gas-atomized maraging steel powder, over a range of temperatures, and compared with commercial semi-hard magnetic alloys. The magnetic properties of the powders were characterized by vibrating sample magnetometry, while the structure by x-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The powders predominantly comprised martensite along with traces of retained-austenite and intermetallic compounds. The powders exhibited the following magnetic behavior at ambient temperature: magnetic saturation (Ms) ~176 Am2/kg, magnetic remanence (Mr) ~1 Am2/kg, coercivity (Hc) ~3 kA/m, and magnetic anisotropy (K1) ~1.8 x 106 J/m3. The Ms, K1, Hc, and Mr increased at sub-ambient temperatures. The magnetic moment per atom (h) of the powder was estimated to be ~1.93 B. With the increase in thermal-treatment temperature, the MS and Hc increased and decreased, respectively, marginally.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Comparative Studies on the Structure and Magnetic Properties of Mechanically Alloyed Fe40Co30Ni30 Medium-entropy Alloy in Argon and Ambient Atmospheres
Development of FeCo/MnZn Ferrite Composite by Field Assisted Sintering Technique
Effects of Steel Sensitization on Magnetic Properties Measured through MOKE Magnetometry
Exchange Coupled Ferromagnetism in Nanochessboards Obtained By Eutectoid Decomposition in the Co-Pt and Fe-Pt Systems
Improvement of the Magnetic Characteristics of Materials Due to the Formation of Unidirectional Boundaries of Ferrite during Processing in SHS Conditions
Introductory Comments: Metallurgy and Magnetism
Magnetic Performance of Gas-atomized Maraging Steel Powders
Microstructural Development and Mechanical Property Changes Due to Temper Embrittlement in HY-80 Submarine Steel
Modeling the Magnetostructural Interactions in Austenitic Steels at the Quantum Mechanical Level
Processing of Fe-Co Alloys: Past and Present
Processing of Vitreous Fe-based Wires into Nanostructured Soft Magnetic Material
Rapid Thermal Processing of Amorphous and Nanocrystalline Soft Magnetic Alloys
The Effect of Deformation of Low Alloy Steels Used in Metallurgy on Their Magnetic Characteristics
The Influence of the Microstructure Obtained After Processing in SHS Conditions on the Magnetic Characteristics of Steels

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