| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Advancements in Steel Structural Refinement
|
| Presentation Title |
In-situ Measurement of Surface Relief Effect during Displacive Transformation of Low-carbon Steel |
| Author(s) |
Ruogu Hou, Junya Inoue |
| On-Site Speaker (Planned) |
Ruogu Hou |
| Abstract Scope |
In-situ observation of surface relief development during displacive transformation was conducted by a digital holographic microscope (DHM) to probe into the process of martensite and bainite transformation. Based on high-resolution signal processing, quantitative measurement of surface relief is achieved. Surface relief of typical variant pair(VP) such as V1/V8 for upper bainite is clarified as well as correlated with prior austenite deformation and inclination of variants. The sequence of variant growth over cooling time is observed as well, indicating that change of variant growth pattern changes with driving force such as transformation temperature. Combining phenomenological theory of martensite crystallography (PTMC) calculation, measured value by DHM are verified, and the reason for the deviation between theoretical value and measured value will be discussed. |