DOAJ Open Access 2022

Phase formations and microstructures of Ti20Zr15Hf15Ni35Cu15 high-entropy shape memory alloy under different aging conditions

Yen-Ting Chang Ming-Hao Lee Ming-Wen Chu Chih-Hsuan Chen

Abstrak

The microstructures and phase formations of Ti20Zr15Hf15Ni35Cu15 high entropy shape memory alloy (HESMA) under different aging conditions were investigated in this study. At aging temperatures below 500 °C, a large amount of the H-phase formed, and the martensitic transformation temperatures were suppressed due to the strain field around the H-phase. Aging treatment at 600 °C caused a eutectoid reaction, which yielded a lamellar structure composed of (Zr,Hf)7Cu10 and Ti2Cu phases. When the aging treatment was increased to 700 °C, the lamellar structure was no longer observed, but (Zr,Hf)7Cu10 and newly-formed Ti2Ni phases formed around the original Ti2Ni phase. Experimental results demonstrated that the H-phase precipitation, eutectoid decomposition, and (Zr,Hf)7Cu10 formation occurred at different aging temperatures. These results could be utilized to adjust the martensitic transformation temperatures and design microstructures, providing a new strategy for developing TiZrHfNiCu HESMAs.

Topik & Kata Kunci

Materials of engineering and construction. Mechanics of materials

Penulis (4)

Yen-Ting Chang

Ming-Hao Lee

Ming-Wen Chu

Chih-Hsuan Chen

Format Sitasi

APA MLA BibTeX

Chang, Y., Lee, M., Chu, M., Chen, C. (2022). Phase formations and microstructures of Ti20Zr15Hf15Ni35Cu15 high-entropy shape memory alloy under different aging conditions. https://doi.org/10.1016/j.mtadv.2022.100223

Akses Cepat

PDF tidak tersedia langsung

Cek di sumber asli →

Lihat di Sumber doi.org/10.1016/j.mtadv.2022.100223

Informasi Jurnal

Tahun Terbit: 2022
Sumber Database: DOAJ
DOI: 10.1016/j.mtadv.2022.100223
Akses: Open Access ✓