2017
DOI: 10.1002/adem.201600690
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Additive Manufacturing of Nickel‐Base Superalloy René N5 through Scanning Laser Epitaxy (SLE) − Material Processing, Microstructures, and Microhardness Properties

Abstract: Nickel-base superalloy Ren e N5 is deposited on cast Ren e N5 substrates with [100] and [001] crystallographic orientations through scanning laser epitaxy (SLE) applied to gas-atomized prealloyed Ren e N5 powder. Single-pass fabrication of crack-free deposits exceeding 1000 micron is achieved. High-resolution optical microscopy reveals that the deposits have 10 times finer primary dendritic arm spacing compared to the substrate. SEM reveals the presence of finer microstructure in the deposit region compared to… Show more

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Cited by 38 publications
(19 citation statements)
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“…), which was then used to control the grain growth in order to obtain oriented epitaxial columnar grains in the laser deposition of a SX Ni 3 Al-based alloy IC221W. Basak et al [ 9 , 10 ] studied the qualities of single-pass deposits of SX CMSX-4 and Rene N5 fabricated by scanning laser epitaxy (SLE). Crack-free deposits with columnar heights larger than 500μm were obtained through computational modeling, experimental process development, and process parameter optimization.…”
Section: Introductionmentioning
confidence: 99%
“…), which was then used to control the grain growth in order to obtain oriented epitaxial columnar grains in the laser deposition of a SX Ni 3 Al-based alloy IC221W. Basak et al [ 9 , 10 ] studied the qualities of single-pass deposits of SX CMSX-4 and Rene N5 fabricated by scanning laser epitaxy (SLE). Crack-free deposits with columnar heights larger than 500μm were obtained through computational modeling, experimental process development, and process parameter optimization.…”
Section: Introductionmentioning
confidence: 99%
“…However, the higher content of Al and Ti reduces the weldability of an alloy and it will be prone to form defects by various mechanisms, such as solidification cracking, liquation cracking and strain-age cracking [17], therefore, the content of Al and Ti is an indication of the printability. As a result, it is difficult to print alloys with high volume of γ , for instance, Inconel 738 [19,20], CM247LC [21], CMSX-4 [22,23] and René N5 [24]. On the other hand, the solid solution strengthened alloys such as Inconel 625 and Hastelloy X, and the γ strengthened alloy like Inconel 718, exhibit better printability.…”
Section: Methodsmentioning
confidence: 99%
“…The microstructure of CMSX-4 ® grew epitaxially from the substrate [104]. While the E-PBF processes used a multi-layer deposition strategy, laser PBF (L-PBF) processes were successful in producing repairs with a deposit thickness greater than 1500 m, with no cracks, using only a single-pass, and for several SX alloys, such as CMSX-4 ® [100,105,106] (Figure 11a), René 142 [11,107], and René N5 [108,109]. L-PBF processes also showed success in repairing heterogeneous material systems e.g., deposition of SX René 142 on René N5 [11].…”
Section: Turbine Blade Repair Via Additive Manufacturing (Am)mentioning
confidence: 99%