| Author(s) |
Rayen Lin, Anirudh Hari, Kento Katagiri, Sophie Parsons, Sara J. Irvine, Laura Madril, Jie Ren, Wuxian Yang, Norimasa Ozaki, Alexis Amouretti, Ryosuke Kodama, Hirotaka Nakamura, Yusuke Nakanishi, Masato Ota, Tharun Reddy, Yusuke Seto, Sota Takagi, Takuo Okuchi, Yuhei Umeda, Kohei Miyanishi, Keiichi Sueda, Tadashi Togashi, Makina Yabashi, Toshinori Yabuuchi, Wen Chen, Yogesh K. Vohra, Leora E. Dresselhaus-Marais |
| Abstract Scope |
Eutectic high entropy alloys (EHEAs) are compositionally complex materials that exhibit dual-phase nanolamellar structures. Due to their combination of high strength and ductility, they are prime candidates for the study of microstructural evolution under extreme conditions. Ni40Co20Fe10Cr10Al18W2, additively manufactured using laser powder bed fusion (LPBF), is among the toughest EHEAs created to date. It has a far from equilibrium, dual-phase FCC + BCC microstructure in the as-built condition. In this study, we studied shock-induced phase transformations at ultra-high pressures using in-situ X-ray diffraction under laser-driven shock compression at the SACLA XFEL facility. These experiments reveal the effects of various alloying elements on phase stability and are relevant for understanding the high-pressure behaviors of EHEAs for aerospace, defense, and nuclear applications. |