2021
DOI: 10.1016/j.msea.2021.141713
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The superplasticity improvement of Inconel 718 through grain refinement by large reduction cold rolling and two-stage annealing

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Cited by 30 publications
(7 citation statements)
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“…However, the δ phase nuclei are extremely dense inside deformed grains for the sample deformed at the true strain of 1.20. The reason for this is that the large plastic deformation introduces a considerable quantity of crystal defects and energy storage, contributing to the dense nucleation of intragranular δ phases [ 45 , 46 ].…”
Section: Resultsmentioning
confidence: 99%
“…However, the δ phase nuclei are extremely dense inside deformed grains for the sample deformed at the true strain of 1.20. The reason for this is that the large plastic deformation introduces a considerable quantity of crystal defects and energy storage, contributing to the dense nucleation of intragranular δ phases [ 45 , 46 ].…”
Section: Resultsmentioning
confidence: 99%
“…However, a few studies concluded that the δ-phase precipitates along the grain boundaries as well as at shear bands following the nucleation of new grains. 3,15,24,25 Interestingly, some investigations that are focused on the fatigue, fracture, and creep behaviour of IN718, reported that the unique morphology of the δ-precipitates causes cracks to propagate in zigzag pattern both within the grains and along the grain boundaries, and thus help in improving the creep-fatigue life of the alloy. [26][27][28] From the above discussion, it is clear that the formation and the control of δ-phase play a crucial role in the processing and performance of IN718.…”
Section: Introductionmentioning
confidence: 99%
“…The implementation of an efficient technology for manufacturing parts of complex geometry is possible by forming an initial ultrafine-grained structure in workpiece that provides high plasticity and low flow stresses during deformation processing [6, 7,10 -20]. This is important especially in relation to hard-to-deform superalloys [8,16,21,22]. Deformation of materials with nano-and ultrafine-grained structures creates an opportunity for shaping at the temperatures of manifestation of both traditional and low-temperature superplasticity superalloys based on titanium [12,14, 20, 23 -27] and nickel [16,21,22].…”
Section: Introductionmentioning
confidence: 99%