Thermal Stability of Nanocrystalline Gradient Inconel 718 Alloy

Ding, Jie; Zhang, Yifan; Niu, Tongjun; Shang, Zhongxia; Xue, Sichuang; Yang, Bo; Li, Jin; Wang, Haiyan; Zhang, Xinghang

doi:10.3390/cryst11010053

Cited by 6 publications

(2 citation statements)

References 63 publications

(83 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The distinct microstructural features observed at various depths of the SMRT sample indicate a formation of GNS in the depth span of 0–300 μm. The present observations are consistent with previous results obtained in other materials, such as Ni [ 6 , 36 , 37 ], Cu [ 2 , 38 ], Al alloy [ 21 , 39 ], and Ni alloy [ 12 , 40 , 41 ], subjected to surface mechanical processing.…”

Section: Resultssupporting

confidence: 93%

Gradient Enhanced Strain Hardening and Tensile Deformability in a Gradient-Nanostructured Ni Alloy

Bao

Zhang

et al. 2021

Nanomaterials

View full text Add to dashboard Cite

Gradient-nanostructured material is an emerging category of material with spatial gradients in microstructural features. The incompatibility between gradient nanostructures (GNS) in the surface layer and coarse-grained (CG) core and their roles in extra strengthening and strain hardening have been well elucidated. Nevertheless, whether similar mechanisms exist within the GNS is not clear yet. Here, interactions between nanostructured layers constituting the GNS in a Ni alloy processed by surface mechanical rolling treatment were investigated by performing unique microtension tests on the whole GNS and three subdivided nanostructured layers at specific depths, respectively. The isolated nanograined layer at the topmost surface shows the highest strength but a brittle nature. With increasing depths, isolated layers exhibit lower strength but enhanced tensile plasticity. The GNS sample’s behavior complied more with the soft isolated layer at the inner side of GNS. Furthermore, an extra strain hardening was found in the GNS sample, leading to a greater uniform elongation (>3%) as compared to all of three constituent nanostructured layers. This extra strain hardening could be ascribed to the effects of the strain gradients arising from the incompatibility associated with the depth-dependent mechanical performance of various nanostructured layers.

show abstract

Section: Resultssupporting

confidence: 93%

Gradient Enhanced Strain Hardening and Tensile Deformability in a Gradient-Nanostructured Ni Alloy

Bao

Zhang

et al. 2021

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…Alloy 718 was chosen for the focus of this study as it is one of the most widely used age-hardened Ni-based superalloys in cast and wrought form [22,23]. Its popularity started in the 1960s in the aerospace and nuclear fields given its outstanding mechanical strength and ductility and its low cost with ~19 wt% Fe and, thus, 718 Ni alloy is chosen as a suitable candidate for this study given the community interest [24,25].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Powder Particle Size Distributions on Mechanical Properties of Alloy 718 by Laser Powder Bed Fusion

Stegman,

Lopez,

Jarosinski

et al. 2023

Metals

Self Cite

View full text Add to dashboard Cite

Currently, metallic powders for laser powder bed fusion (LPBF) primarily come in two commercially available powder size distributions (PSDs): 15+/45− for non-reactive powders and 15+/63− for reactive powders. These powders are generally produced via gas atomization processes that create highly spherical particles with a Gaussian PSD. Because of the standard deviation within a Gaussian distribution, only small portions of the total product are used for LPBF applications. This screening process makes the other particle sizes a waste product and, thus, increases processing costs. The non-reactive 718 powder was printed with both the typical PSD of 15+/45− and a wider bimodal experimental PSD. Compared to conventional 718, the 718 alloys with bimodal PSD shows less than a 0.2% difference in density, and insignificant change in mechanical behavior. Electron backscattered diffraction studies revealed that grain sizes and morphology were similar between the two sample sets, but bimodal 718 alloy has a slightly greater degree of large grains. The study suggests that particles with wide or bimodal size distributions show promise in producing equivalent high-quality products without sacrificing mechanical properties.

show abstract

A thermochemical database from high-throughput first-principles calculations and its application to analyzing phase evolution in AM-fabricated IN718

Wang

Lia²,

Wang³

et al. 2022

Acta Materialia

View full text Add to dashboard Cite

Thermal Stability of Nanocrystalline Gradient Inconel 718 Alloy

Cited by 6 publications

References 63 publications

Gradient Enhanced Strain Hardening and Tensile Deformability in a Gradient-Nanostructured Ni Alloy

Gradient Enhanced Strain Hardening and Tensile Deformability in a Gradient-Nanostructured Ni Alloy

The Influence of Powder Particle Size Distributions on Mechanical Properties of Alloy 718 by Laser Powder Bed Fusion

A thermochemical database from high-throughput first-principles calculations and its application to analyzing phase evolution in AM-fabricated IN718

Contact Info

Product

Resources

About