Healing cracks in additively manufactured NiTi shape memory alloys

Zhu，Jia Ning1; Ding，Zhaoying1; Borisov，Evgenii2; Yao，Xiyu3; Brouwer，Johannes C.1; Popovich，Anatoly2; Hermans，Marcel1; Popovich，Vera1

2023

10.1080/17452759.2023.2246437

Virtual and Physical Prototyping   Impact Factor & Quartile

1745-2759

1745-2767

The pursuit of enhancing NiTi superelasticity through laser powder bed fusion (L-PBF) and [001] texture creation poses a challenge due to increased susceptibility to hot cracking in the resulting microstructure with columnar grains. This limitation restricts NiTi's application and contributes to material waste. To overcome this, we introduce a pioneering approach: utilising spark plasma sintering (SPS) to heal directional cracks in [001] textured L-PBF NiTi shape memory alloy. Diffusion bonding and oxygen utilisation for TiNiO formation was found to successfully heal the cracks. SPS enhances mechanical properties, superelasticity at higher temperatures, and two-way shape memory strain during thermomechanical cycling. This work provides an alternative solution for healing cracks in L-PBF parts, enabling the sustainable reuse of cracked materials. By implementing SPS, this approach effectively addresses hot cracking limitations, expanding the application potential of L-PBF NiTi parts while improving their functional and mechanical properties.

healing crack Laser powder bed fusion NiTi alloys spark plasma sintering superelasticity

SCI

English

Others

Russian Science Foundation[19-79-30002]

Engineering ; Materials Science

Engineering, Manufacturing ; Materials Science, Multidisciplinary

WOS:001050268500001

TAYLOR & FRANCIS LTD

2-s2.0-85168248430

Scopus

1.Department of Materials Science and Engineering,Delft University of Technology,Delft,Netherlands
2.Institute of Mechanical Engineering,Materials,and Transport,Peter the Great Saint-Petersburg Polytechnic University,Saint Petersburg,Russian Federation
3.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,China

Zhu，Jia Ning,Ding，Zhaoying,Borisov，Evgenii,et al. Healing cracks in additively manufactured NiTi shape memory alloys[J]. Virtual and Physical Prototyping,2023,18(1).

Zhu，Jia Ning.,Ding，Zhaoying.,Borisov，Evgenii.,Yao，Xiyu.,Brouwer，Johannes C..,...&Popovich，Vera.(2023).Healing cracks in additively manufactured NiTi shape memory alloys.Virtual and Physical Prototyping,18(1).

Zhu，Jia Ning,et al."Healing cracks in additively manufactured NiTi shape memory alloys".Virtual and Physical Prototyping 18.1(2023).