| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
|
| Presentation Title |
E-5: Investigating the Relationship between Magnetic Barkhausen Noise, Microhardness, and Microstructural Development during Aging in HY-80 Steel |
| Author(s) |
Michael Roberts, Jason Schibler, Charles D'Ambra, Michele V. Manuel, Thomas W. Krause, Aroba Saleem |
| On-Site Speaker (Planned) |
Michael Roberts |
| Abstract Scope |
HY-80 Steel is a low carbon, high strength steel often used in submarines. High impact toughness ensures that hull breaches do not occur after mild collisions at deep depths; however, a phenomenon temper embrittlement can cause premature intergranular fracture leading to decreased impact toughness. Hence, developing a reliable technique to detect temper embrittlement is important. Magnetic Barkhausen Noise (MBN) has potential to be used for non-destructive analysis of HY-80. The current study investigated the relation between MBN, microstructure, and hardness of HY-80. MBN measurements were performed after heat treating samples at 525°C for varying holding times (0-336 hrs). Scanning electron microscopy and Vickers microhardness testing was also performed after each heat treatment. Microstructures were analyzed using image processing techniques and Computer Vision for quantitative analysis. MBN energy initially increased with holding time followed by a decrease, which was attributed to the change in the pinning density due to temper embrittlement. |