Microstructure characteristics of wire arc additive manufactured Ni Al intermetallic compounds

Investigating the Influence of Al Contents on Microstructure and Mechanical Properties of Ni3Al Superalloy Fabricated by Twin Wire‐Based Direct Arc Energy Deposition

“…Ref. [17] indicated that when the Al content exceeded the stoichiometric ratio of 25 at.%, a reticular interdendritic γ 0 phase would form. Even needle-like brittle NiAl phase appeared when the Al content was above 30 at.%.…”

“…After that, the authors used a twin Ni and Al wire‐based direct plasma arc energy deposition and studied the effect of Al content at the range of 25–33 at.% on the microstructure of the deposited NiAl/Ni 3 Al intermetallic alloy, but lacked the characterization of mechanical properties. [ 17 ] Our previous research [ 18 ] prepared 78Ni22Al (at.%) based on twin wire‐based DED and obtained higher mechanical performance with a tensile strength of 817 MPa and an elongation of 21%. The microstructure and properties of the deposited Ni 3 Al superalloy are a function of Al content.…”

“…When the content of Al and Ti met the stoichiometric ratio (Ni: AlþTi=3:1), the massive interdendritic γ 0 phase and coarser γ 0 precipitations with an average diameter of 0.62 μm were observed in the solidification microstructure of the deposited 75Ni22Al3Ti superalloy. Ref [17]. indicated that when the Al content exceeded the stoichiometric ratio of 25 at.%, a reticular interdendritic γ 0 phase would form.…”

Integrated Laser Additive Manufacturing of α-Al2O3 Nanoparticle-Seeded β/γ’ Ni-Al Intermetallic Alloy with Enhanced High-Temperature Oxidation Performance

“…Laser additive manufacturing (LAM) is a promising near-net-shape-forming technology that can accurately produce complex components via a stacking method of point-bypoint, line-by-line and layer-by-layer under the control of a computer-aided design (CAD) system [15][16][17][18]. The laser 3D printing of Ni-Al intermetallic alloys has been reported, with the focus mostly on their mechanical properties [19][20][21][22][23][24]. In this contribution, LAM was applied to manufacture a β/γ' two-phase Ni-Al intermetallic alloy with better resistance to high-temperature oxidation.…”

Heat‐Resistant Intermetallic Compounds and Ceramic Dispersion Alloys for Additive Manufacturing: A Review

“…Although ICs and CDAs can be fabricated using other methods, LPBF, EPBF, and LDED have demonstrated the ability to fabricate high‐strength near‐net‐shape structural components with reasonable dimensional accuracy and surface roughness. [ 15–19 ] Thus, the need for additional drilling and cutting operations is reduced or eliminated, and an opportunity to expand the use of ICs and CDAs is presented, accelerating innovation in structural design and increasing mechanical systems performance. However, the solidification process of these additive fabrication methods is different compared to traditional fabrication.…”