Additive manufacturing of NiTi shape memory alloy and its industrial applications

Dzogbewu, Thywill Cephas; de Beer, Deon Johan

doi:10.1016/j.heliyon.2023.e23369

Cited by 11 publications

(2 citation statements)

References 103 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Over the last 20 years, this technology has advanced quickly, and it was first used in restorative dentistry [14,15]. Compared to conventional manufacturing, additive manufacturing (AM) offers several advantages, including the ability to easily produce complicated geometries, design freedom, shorter manufacturing lead times, and raw material savings [16].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of 3D Printing Orientation on Volume Parameters and Mechanical Properties of As-Build TI64ELI

Lebea,

Desai,

Ngwangwa

et al. 2024

Metals

View full text Add to dashboard Cite

The discovery of the utility of various titanium alloys as implant biomaterials has resulted in these materials becoming far more popular than other metals in the medical world. However, the production of these materials using additive manufacturing has its own challenges some of those being the surface finish that can be used as an implantology material. As such, the purpose of this study is to evaluate the influence of 3D-printed Ti64ELI on the as-built samples printed at 60°, 90°, and 180° orientations. Such studies are very limited, specifically in the development of the laser shock peening surface modification of dental implants. The study showed that each mechanical test that was performed contributes differently to the printing orientation, e.g., some tests yielded better properties when 180° printing orientation was used, and others had poorer properties when a 180° printing orientation was used. It was observed that 60° testing yielded a micro-hardness value of 349.6, and this value was increased by 0.37% when 90° orientation was measured. The lowest HV value was observed under a 180° orientation with 342.2 HV. The core material volume (Vmc) was 0.05266 mm3/mm2 at a 60° orientation, which increased by 11.48% for the 90° orientation. Furthermore, it was observed that the surface roughness (Sa) at 60° orientation was 43.68 μm. This was further increased by 6% when using the 90° orientation.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluation of 3D Printing Orientation on Volume Parameters and Mechanical Properties of As-Build TI64ELI

Lebea,

Desai,

Ngwangwa

et al. 2024

Metals

View full text Add to dashboard Cite

show abstract

“…Alumina (Al 2 O 3 ), as a typical ceramic material, not only possesses high hardness, strength, and stability [1][2][3] but also exhibits excellent thermal, optical, and electromagnetic properties [4][5][6]. It is now widely used in industrial, medical, chemical, and aerospace fields [7][8][9]. Traditional Al 2 O 3 ceramic preparation technologies primarily include molding, tape casting, injection molding [10], and gel casting [11].…”

Section: Introductionmentioning

confidence: 99%

Vat Photopolymerization of Ceramic Parts: Effects of Carbon Fiber Additives on Microstructure and Mechanical Performance

Wang,

Wu,

Guo

et al. 2024

Materials

View full text Add to dashboard Cite

Vat photopolymerization (VPP), as an additive manufacturing (AM) technology, can conveniently produce ceramic parts with high resolution and excellent surface quality. However, due to the inherent brittleness and low toughness of ceramic materials, manufacturing defect-free ceramic parts remains a challenge. Many researchers have attempted to use carbon fibers as additives to enhance the performance of ceramic parts, but these methods are mostly applied in processes like fused deposition modeling and hot pressing. To date, no one has applied them to VPP-based AM technology. This is mainly because the black carbon fibers reduce laser penetration, making it difficult to cure the ceramic slurry and thus challenging to produce qualified ceramic parts. To address this issue, our study has strictly controlled the amount of carbon fibers by incorporating trace amounts of carbon fiber powder into the original ceramic slurry with the aim to investigate the impact of these additions on the performance of ceramic parts. In this study, ceramic slurries with three different carbon fiber contents (0 wt.%, 0.1 wt.%, 0.2 wt.%, and 0.3 wt.%) were used for additive manufacturing. A detailed comparative analysis of the microstructure, physical properties, and mechanical performance of the parts was conducted. The experimental results indicate that the 3D-printed alumina parts with added carbon fibers show varying degrees of improvement in multiple performance parameters. Notably, the samples prepared with 0.2 wt.% carbon fiber content exhibited the most significant performance enhancements.

show abstract

Homogenization Heat Treatment and Tribological Properties of In Situ Alloyed NiTiCu by Laser Powder‐Bed Fusion

Marrani,

Gao,

Tan

et al. 2024

Adv Eng Mater

View full text Add to dashboard Cite

In situ alloying by additive manufacturing (AM) of premixed powders has been recognized as a promising low‐cost method for creating complex parts for biomedical implants, in which homogenization heat treatment is a critical concern in this technology. Also, as promising implant materials, their tribological properties under dry and lubrication conditions are significantly concerned with evaluating the functionalities of 3D printing. This work preliminarily addresses these two concerns with the laser powder‐bed fusion (LPBF) 3D‐printed nickel titanium copper (NiTiCu) alloy using three homogenization heat treatments and ball‐on‐disc wear tests under dry and NaCl‐lubricated conditions. It is found that to achieve sufficiently good microstructural homogeneity with low porosity, a temperature of 800 °C and a duration of 5 h is needed. Despite the promising outcome, analysis of the results revealed that all heat treatments led to the formation of a secondary phase identified as Ti2(Ni,Cu), which induced two‐step phase transformations. Thus, further studies on the optimization of the postprocessing techniques are required. The heat‐treated alloy resulting in the most favorable properties is selected for tribological testing. AM and the addition of Cu are observed to enhance the wear resistance of the alloy under lubrication conditions.

show abstract

Additive manufacturing of NiTi shape memory alloy and its industrial applications

Cited by 11 publications

References 103 publications

Evaluation of 3D Printing Orientation on Volume Parameters and Mechanical Properties of As-Build TI64ELI

Evaluation of 3D Printing Orientation on Volume Parameters and Mechanical Properties of As-Build TI64ELI

Vat Photopolymerization of Ceramic Parts: Effects of Carbon Fiber Additives on Microstructure and Mechanical Performance

Homogenization Heat Treatment and Tribological Properties of In Situ Alloyed NiTiCu by Laser Powder‐Bed Fusion

Contact Info

Product

Resources

About