| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Austenite Formation and Decomposition V: A Symposium in Memory of Prof. Mats Hillert
|
| Presentation Title |
Novel Hierarchical γ90-εtwin-α’ Triple Phase Structure at ε-ε Martensite Intersection |
| Author(s) |
Digvijay Singh, Fumiyoshi Yoshinaka, Susumu Takamori, Satoshi Emura, Takahiro Sawaguchi |
| On-Site Speaker (Planned) |
Digvijay Singh |
| Abstract Scope |
The interaction between deformation-induced ε-martensite phases in austenitic steels has garnered significant interest due to its profound impact on material performance. Recently γ/ε/α’ phase microstructure was found at ε-ε intersection in a single crystal of AISI316 steel compressed along the [0 0 1]γ axis at 173 K. Using electron backscattered diffraction analysis, a hierarchical triple phase structure was discovered at ε–ε intersection, where the γ rotated 90º from the matrix (γ90), {101 ̅2} ε-twin, and α’ phases coexist. Depending on the operative shear angle with a common intersection axis, either 90º (Type I) or 30º (Type II), three distinct atomic rearrangements were observed: γ90 was present at Type I intersection, and α’-phase was developed at Type II intersection, respectively. {101 ̅2} ε-twin also occurred at Type I intersection, serving as an accommodation mechanism alongside the intersection γ90. In this study, the deformation pathway for the intersection products is discussed. |