About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
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Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
High-pressure Induced Phase Transitions of a Metastable Complex Concentrated Alloy System with Varying Stacking Fault Energies |
Author(s) |
Christopher R. Reynolds, Alden Watts, Marcus Young, Rajiv Mishra, Dean Smith, Dmitry Popov, Jeffrey T. Lloyd |
On-Site Speaker (Planned) |
Christopher R. Reynolds |
Abstract Scope |
The ability to decrease the stacking fault energy (SFE) in metastable complex concentrated alloys (CCAs) has led to the development of twinning induced plasticity (TWIP) and/or transformation induced plasticity (TRIP) CCAs. One such TRIP-CCA system of interest is the Fe(40-x)Mn20Cr15Co20Si5Cux, where x varies from 0.0 to 3.0 at. %. The purpose of our study is to investigate of the high-pressure phase transformation of the γ-f.c.c. to the ε-h.c.p. as function of the SFE and to explore the phase compatibility at the interfaces. In this study, the high-pressure mechanical response of the base alloy, Fe40Mn20Cr15Co20Si5, is compared to the response of alloys with a Cu content of 1.5 and 3.0 at.% using a diamond anvil cell experiment coupled with synchrotron radiation X-ray diffraction. In addition to identifying the critical pressure for phase transformation, the stability of the ε-h.c.p. phase upon decompression is investigated. Results are compared with microstructural observations. |
Proceedings Inclusion? |
Undecided |