Semantic Scholar Open Access 2019 15 sitasi

Mechanical behaviour of Ti-Nb-Hf alloys

R. Yang K. Rahman A. N. Rakhymberdiyev D. Dye V. Vorontsov

Lihat Sumber DOI

Abstrak

Abstract Ti-(24-26)Nb-(2-4)Hf at.% alloys were designed by assuming that hafnium has a similar effect to zirconium in the Ti-Nb-Zr system. Alloy specimens were produced using vacuum arc melting and subsequently hot-rolled. Uniaxial tensile testing was then performed both at ambient temperature and in liquid nitrogen at −196°C. While the alloys showed no obvious superelastic behaviour, they exhibited pronounced strain hardening and could achieve high elongations before failure (>30% engineering strain). Post-mortem examination revealed that the mechanism of strain hardening was extensive {332} and/or {211} deformation twinning. Twinning was found to be more prevalent in alloys with 2 at.% Hf compared to those with 4 at.%. The cryogenic temperature deformation also promoted deformation twinning when compared to ambient temperature results. As is the case with other metastable β -Ti alloys, maintaining control over the precipitation of ω phases was found to be crucial for attaining desirable mechanical behaviour. Further, microstructural engineering and alloying may be used to develop strong, lightweight alloys based on the Ti-Nb-Hf system with beneficial strain hardening characteristics for energy absorption, cryogenic and biomedical applications.

Topik & Kata Kunci

Materials Science

Penulis (5)

R. Yang

K. Rahman

A. N. Rakhymberdiyev

D. Dye

V. Vorontsov

Format Sitasi

APA MLA BibTeX

Yang, R., Rahman, K., Rakhymberdiyev, A.N., Dye, D., Vorontsov, V. (2019). Mechanical behaviour of Ti-Nb-Hf alloys. https://doi.org/10.1016/J.MSEA.2018.10.019

Akses Cepat

Lihat di Sumber doi.org/10.1016/J.MSEA.2018.10.019

Informasi Jurnal

Tahun Terbit: 2019
Bahasa: en
Total Sitasi: 15×
Sumber Database: Semantic Scholar
DOI: 10.1016/J.MSEA.2018.10.019
Akses: Open Access ✓