Microstructure and mechanical properties of rene 41 alloy manufactured by laser powder bed fusion

Atabay, Sıla Ece; Sánchez-Mata, Oscar; Gauvin, Raynald; Brochu, Mathieu

doi:10.1016/j.msea.2019.138849

Cited by 40 publications

(14 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1b) presents elongated, columnar grains with dimensions about 100 to 250 µm along the building direction (Z). Such columnar morphology likely results from the vertical thermal gradient during the layer-bylayer AM process, as commonly reported in the literature for superalloys made by LPBF [27][28][29] . In agreement with classical AM microstructures as well, this is accompanied by a preferential [001] orientation along the build direction, like for all other face-centered-cubic materials.…”

Section: Methodssupporting

confidence: 66%

Dynamic response of wrought and additively manufactured nickel-based alloys to high velocity impacts of laser-launched flyers

Barraud

Rességuier

Baillargeat

et al. 2022

Journal of Applied Physics

View full text Add to dashboard Cite

Although nickel-based superalloys are widely used in the industry, their response to shock loading is still rarely investigated. Here, the impacts of laser-launched flyers were used to study the dynamic behavior of a Rene 65 superalloy under shock pressures of about 10 GPa at very high strain rates of about 106 s−1. Three types of samples, wrought or additively manufactured (laser powder bed fusion) and subjected to different heat treatment conditions, were investigated. These experiments allowed the measurement of the Hugoniot elastic limit (compressive yield strength) and the spall (tensile) strength, both in upper ranges compared with the most common metals. Post-recovery analyses involving various techniques provided insight into dynamic failure with a combination of transgranular ductile fracture and intergranular cracks with preferential nucleation sites, strongly dependent on the different microstructures related to fabrication routes and thermal treatments.

show abstract

Section: Methodssupporting

confidence: 66%

Dynamic response of wrought and additively manufactured nickel-based alloys to high velocity impacts of laser-launched flyers

Barraud

Rességuier

Baillargeat

et al. 2022

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…This has been attributed to two factors; the exceptionally high cooling rate associated with L-PBF and the sluggish c 0 formation kinetics in this alloy. Rene 41 processed by L-PBF also showed no signs of c 0 formation during the printing process [42]. In a similar fashion, no c 0 was detected in the microstructure of IN738 alloy processed by L-PBF [43].…”

Section: Matrix Phasementioning

confidence: 68%

“…c 0 alloys are more challenging to print in AM as high c 0 content is known to contribute to cracking. Most c 0 alloys are processed by E-PBF where the use of high preheat temperatures can minimize cracking, however, some researchers have successfully processed alloys such as Haynes 282, Rene 41, and IN738 using L-PBF [41][42][43][44]. Overall, CMSX-4 has seen the greatest amount of research for c 0 forming alloys and has even been used to successfully print single crystal microstructures using E-PBF [45,46].…”

Section: Overview Of Main Microstructure Constituents In Common Ni-ba...mentioning

confidence: 99%

Powder bed fusion additive manufacturing of Ni-based superalloys: a review of the main microstructural constituents and characterization techniques

et al. 2022

View full text Add to dashboard Cite

Metal additive manufacturing (AM) has unlocked unique opportunities for making complex Ni-based superalloy parts with reduced material waste, development costs, and production lead times. Considering the available AM methods, powder bed fusion (PBF) processes, using either laser or electron beams as high energy sources, have the potential to print complex geometries with a high level of microstructural control. PBF is highly suited for the development of next generation components for the defense, aerospace, and automotive industries. A better understanding of the as-built microstructure evolution during PBF of Ni-based superalloys is important to both industry and academia because of its impacts on mechanical, corrosion, and other technological properties, and, because it determines post-processing heat treatment requirements. The primary focus of this review is to outline the individual phase formations and morphologies in Ni-based superalloys, and their correlation to PBF printing parameters. Given the hierarchal nature of the microstructures formed during PBF, detailed descriptions of the evolution of each microstructural constituent are required to enable microstructure control. Ni-based superalloys microstructures commonly include γ, γ′, γ′′, $$\delta$$ δ , TCP, carbides, nitrides, oxides, and borides, dependent on their composition. A thorough characterization of these phases remains challenging due to the multi-scale microstructural hierarchy alongside with experimental challenges related to imaging secondary phases that are often nanoscale and (semi)-coherent. Hence, a detailed discussion of advanced characterization techniques is the second focus of this review, to enable a more complete understanding of the microstructural evolution in Ni-based superalloys printed using PBF. This is with an expressed goal of directing the research community toward the tools necessary for a thorough investigation of the processing-microstructure-property relationships in PBF Ni-based superalloy parts to enable microstructural engineering.

show abstract

“…In the more recent study using LPBF, Atabay et al found that of the formable carbides observed, MC was rich in Mo and Ti, M 6 C was rich in Mo and Co, and M 23 C 6 was found to be rich in Cr [9].…”

Section: Strengthening Mechanisms Of This Alloymentioning

confidence: 96%

High Temperature Failure and Microstructural Investigation of Additive Manufactured Rene 41

James

Ganguly²,

Pardal³

2022

Preprint

View full text Add to dashboard Cite

In developing a wire-arc direct energy deposition process for creep resistant alloys used in high-speed flight applications, structures were built from nickel-based superalloy Rene 41. Samples of AM material were analysed for their microstructural and mechanical properties, in both as deposited (AD) and heat-treated (HT) conditions. Tensile specimens were tested at room-temperature, 538, 760, and 1000 °C. Macroscopically, large columnar grains made up of a typical dendritic structure were observed. Microscopically, significant segregation of heavier elements, grain boundary precipitates, and secondary phases were observed, with key differences observed in HT material. There was a clear distinction between failure modes at different testing temperatures and between AD and HT variants. A fractographic investigation found a progressive move from brittle to ductile fracture with increasing testing temperature in both AD and HT conditions, as well as microstructural features which support this observation.

show abstract

Microstructure and mechanical properties of rene 41 alloy manufactured by laser powder bed fusion

Cited by 40 publications

References 40 publications

Dynamic response of wrought and additively manufactured nickel-based alloys to high velocity impacts of laser-launched flyers

Dynamic response of wrought and additively manufactured nickel-based alloys to high velocity impacts of laser-launched flyers

Powder bed fusion additive manufacturing of Ni-based superalloys: a review of the main microstructural constituents and characterization techniques

High Temperature Failure and Microstructural Investigation of Additive Manufactured Rene 41

Contact Info

Product

Resources

About