3D printed Mg-NiTi interpenetrating-phase composites with high strength, damping capacity, and energy absorption efficiency

Mingyang Zhang; Qin Yu; Zengqian Liu; Jian Zhang; Guoqi Tan; Da Jiao; Wenjun Zhu; Shujun Li; Zhefeng Zhang; Rui Yang; Robert O Ritchie

doi:10.1126/sciadv.aba5581

3D printed Mg-NiTi interpenetrating-phase composites with high strength, damping capacity, and energy absorption efficiency

Sci Adv. 2020 May 8;6(19):eaba5581. doi: 10.1126/sciadv.aba5581. eCollection 2020 May.

Authors

Mingyang Zhang^{1

2}, Qin Yu³, Zengqian Liu^{1

2}, Jian Zhang¹, Guoqi Tan^{1

2}, Da Jiao¹, Wenjun Zhu⁴, Shujun Li¹, Zhefeng Zhang^{1

2}, Rui Yang^{1

2}, Robert O Ritchie^{3

5}

Affiliations

¹ Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
² School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
³ Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
⁴ National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, Mianyang 621900, China.
⁵ Department of Materials Science and Engineering, University of California Berkeley, Berkeley, CA 94720, USA.

Abstract

It is of significance, but still remains a key challenge, to simultaneously enhance the strength and damping capacities in metals, as these two properties are often mutually exclusive. Here, we provide a multidesign strategy for defeating such a conflict by developing a Mg-NiTi composite with a bicontinuous interpenetrating-phase architecture through infiltration of magnesium melt into three-dimensionally printed Nitinol scaffold. The composite exhibits a unique combination of mechanical properties with improved strengths at ambient to elevated temperatures, remarkable damage tolerance, good damping capacities at differing amplitudes, and exceptional energy absorption efficiency, which is unprecedented for magnesium materials. The shape and strength after deformation can even be largely recovered by heat treatment. This study offers a new perspective for the structural and biomedical applications of magnesium.

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