In-situ synthesis of high strength and toughness TiN/Ti6Al4V sandwich composites by laser powder bed fusion under a nitrogen-containing atmosphere

In-situ additive manufacturing of high strength yet ductility titanium composites with gradient layered structure using N2

“…Additionally, to confirm that the actual N 2 concentration in the forming chamber was the same as the preset, a time-offlight mass spectrometer was also used to quantify the real N 2 -Ar ratios at the building position in the forming chamber. The test equipment and results were detailed in our previous research [30,35]. This experiment's airflow, fan frequency, and other related parameters are consistent with the previous study [30].…”

“…The design and preparation of the in-situ self-generated layered structure of the Ti composites are shown in figure 2. Firstly, based on our previous research [30], 10 mm × 10 mm × 5 mm samples were LPBF formed under 0%-20%N 2 (the rest was Ar) to construct the correspondence between N 2 concentration and in-situ synthesized TiN content. The laser parameters used were laser power of 160 W, scanning speed of 1 000 mm s −1 , and hatch space of 0.07 mm.…”

“…Moreover, this way of printing multi-materials would induce additional problems, such as mixed contamination of the printed powder and the high cost or difficulty of separating the as-mixed powder, which contradicts the original intention of multi-material green and sustainable printing for additive manufacturing. Therefore, investigations were performed to introduce a low-concentration active atmosphere to manufacture titanium or TMCs in the LPBF process [28][29][30]. Due to the relatively high solubility of O and N in Ti matrix, N and O usually form interstitial solid solutions [31].…”

Role of scanning speed on the microstructure and mechanical properties of additively manufactured Al2O3‒ZrO2

“…It boasts the advantages of reduced fabrication cost, high design freedom, and less leading time. [18][19][20][21][22][23] AM could potentially disrupt the manufacturing industry and has been successfully demonstrated for fabricating polymers and metals. 24,25 Among various AM technologies, laser powder bed fusion (LPBF) stands out for its ability to fabricate ceramics in a single step without debinding and sintering, making it an attractive option for producing Al 2 O 3 -based eutectic ceramics.…”

“…Additive manufacturing (AM) is a layer‐wised material deposition technology based on a 3D computer‐aided design model. It boasts the advantages of reduced fabrication cost, high design freedom, and less leading time 18–23 . AM could potentially disrupt the manufacturing industry and has been successfully demonstrated for fabricating polymers and metals 24,25 .…”