Abstract
Nickel-titanium alloys have been widely used in biomedical, aerospace and other fields due to their shape memory effect, superelastic effect, as well as biocompatible and elasto-thermal properties. Additive manufacturing (AM) technology can form complex and fine structures, which greatly expands the application range of Ni-Ti alloy. In this study, the development trend of additive manufactured Ni-Ti alloy was analyzed. Subsequently, the most widely used selective laser melting (SLM) process for forming Ni-Ti alloy was summarized. Especially, the relationship between Ni-Ti alloy materials, SLM processing parameters, microstructure and properties of Ni-Ti alloy formed by SLM was revealed. The research status of Ni-Ti alloy formed by wire arc additive manufacturing (WAAM), electron beam melting (EBM), directional energy dedication (DED), selective laser sintering (SLS) and other AM processes was briefly described, and its mechanical properties were emphatically expounded. Finally, several suggestions concerning Ni-Ti alloy material preparation, structure design, forming technology and forming equipment in the future were put forward in order to accelerate the engineering application process of additive manufactured Ni-Ti alloy. This study provides a useful reference for scientific research and engineering application of additive manufactured Ni-Ti alloys.
Highlights
Wang et al [15] studied the influence of selective laser melting (SLM) parameters on the phase transition temperature of Ni-Ti alloy, and the results showed that the peak martensitic transition temperature (MP) decreased with the increase in laser power
The results showed that the phase transition temperature decreased with the increase in scanning spacing
Wang et al [17] systematically studied the influence of various SLM processing parameters on the independence of phase transition curves of Ni-Ti alloy, as shown in Figure 7, and the results showed that the phase transition temperature of Ni-Ti alloy decreased with the increase in laser scanning speed and scanning spacing, and increased with the increase in laser power and energy density
Summary
It shows that the United States started early in the resea2rocfh on additive manufactured Ni-Ti alloys and is the main research front in this field, followed by China. The internal relationship between material, process and performance of additive manufactured Ni-Ti alloys is summarized, the possible reasons for the gap in engineering application of additive manufactured Ni-Ti alloys are analyzed, and the possible solutions different years; (b) number of papers published by different countries/regions
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