Recoverable strain in a new biomedical Ti-24Nb-4Zr-8Sn alloy with cellular structure fabricated by electron beam melting

ABSTRACT

The study describes the recoverable strain in Ti-24Nb-4Zr-8Sn (wt.%) alloy with cellular structure having rhombic dodecahedron and topology-optimised unit cell fabricated by electron beam melting. At a certain cyclic strain, the recoverable strain in rhombic dodecahedron structure was greater in comparison to topology-optimised structure because of different stress distribution on struts. The cellular structure of Ti-24Nb-4Zr-8Sn alloy with rhombic dodecahedron unit cell had larger recoverable strain in comparison to Ti-6Al-4V cellular structure. This behaviour is attributed to higher strength to modulus ratio (σ/E) and superelasticity of Ti-24Nb-4Zr-8Sn alloy.

KEYWORDS:

• Ti-24Nb-4Zr-8Sn
• electron beam melting
• recoverable strain
• cellular structure

Acknowledgments

This work was supported partially by Chinese MoST (2017YFC1104903), Key Research Program of Frontier Sciences, CAS (QYZDJ-SSW-JSC031) and National Natural Science Foundation of China (51571190, 51771209, 51871220, 51631007). The authors from Institute for Metal Research gratefully acknowledge continued collaboration with Professor R.D.K. Misra.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [51571190, 51771209, 51871220];Chinese MoST [2017YFC1104903];Key Research Program of Frontier Sciences, CAS [QYZDJ-SSW-JSC031].