About this Abstract |
Meeting |
MS&T23: Materials Science & Technology
|
Symposium
|
Advances in Ferrous Metallurgy
|
Presentation Title |
High-Resolution, High-Speed Digital Holographic Microscopy of Ferrous Metals |
Author(s) |
Jose Albert Guevara, Junya Inoue |
On-Site Speaker (Planned) |
Jose Albert Guevara |
Abstract Scope |
Digital Holographic Microscopes (DHM) have been around for many years, but its main application has been in imaging of transparent biological samples. Recently, a DHM was developed around a conventional optical microscope for the observation of metal samples, specifically the surface relief in low-carbon steel and in Widmanstätten and bainitic ferrites. A standalone DHM was designed and built using off-the-shelf components to accommodate larger setups (such as tensile testing), and also in the prospect of improved lateral and height resolutions. Preliminary data from tensile testing of Fe-1%Si has shown high image quality and defined fringe lines. After unwrapping and assigning of height calibration to gray values, not only are the fine slip bands clearly resolved, but also the bulk deformation of the grains can be visualized. This technique will also be demonstrated for fatigue in iron and other steels. |