| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials
|
| Presentation Title |
Influence on the Structural and Magnetic Properties of the Pre-alloyed Gas-atomized Maraging Steel Powder During Mechanical Milling |
| Author(s) |
Ganesh Varma Thotakura, Ramasis Goswami, Tanjore V. Jayaraman |
| On-Site Speaker (Planned) |
Tanjore V. Jayaraman |
| Abstract Scope |
We investigated the influence on the structural and magnetic properties of gas-atomized maraging steel powder during mechanical milling. The as-received powder comprised, primarily, martensite phase (α) and traces of retained austenite (γ); the saturation magnetization (MS) and intrinsic coercivity (HCI), at 300 K, was ~176 Am2/kg and ~3 kA/m, respectively. Powders milled from 3 h to 8 h comprised nanocrystalline α; the MS and HCI ranged from ~164 - 169 Am2/kg and ~4.9 - 6.7 kA/m, respectively. Milling above 8 h formed austenite and extraneous intermetallic phases, reduced MS and increased HCI. The MS increased with the decrease in the temperature from 300 - 60 K, for both the as-received and milled powders. The thermomagnetic behavior of the as-received and the milled powders from 300-900 K was fairly reversible. The magnetic properties of as-received and powder milled for 5 h were better than the powder milled for 56 h. |
| Proceedings Inclusion? |
Planned: |