Micro-scratching behavior of heat-treated cutting chips of Inconel 718
Micro-scratching behavior of heat-treated cutting chips of Inconel 718
The present work investigates the micro-scratching behavior of Inconel 718 alloy processed by machining and subsequent heat-treatment. As-machined chips were heat-treated at 700 °C, 800 °C, and 900 °C, all for a short duration of 15 min, followed by water quenching to allow the precipitation of γ
I and γ
II phases. Microstructural analysis of the processed Inconel 718 chips revealed the formation of nano-size precipitates either along the grain boundaries or at the triple junctions, which contributed to the improved mechanical property compared to the solution annealed sample. It was found that the chips heat-treated at 700 °C possessed the highest average hardness (548 Kgf/mm
2) among all the sample conditions. High hardness of as-machined chips and short heat-treatment at 700 °C led bimodal microstructure and precipitation pining resulting in maximum wear resistance compared to other heat-treatment conditions. Subsequently, to verify the outcome, worn surface analysis of as-machined and subsequently heat-treated chips was performed. Comparatively, larger size cracks in sample heat-treated at 900 °C attributed to a high cracking scratch zone in the processed material, i.e., less wear resistance, whereas no/nominal crack in as-machined chips and chips heat-treated at 700 °C attributed to no cracking scratch zone.
Heat-treatment, Inconel 718, Mechanical property, Scratch test, Severe plastic deformation, Wear behavior
Chand Yadav, Prabhat
d7447f15-912a-4db1-8a99-9f38b2d423e0
Setia, Prince
47f3c1c8-666b-458e-93ab-89f1143552ac
Sahu, Sandeep
ec8fe3c7-0daa-48a6-96bd-a7d55397f94a
August 2022
Chand Yadav, Prabhat
d7447f15-912a-4db1-8a99-9f38b2d423e0
Setia, Prince
47f3c1c8-666b-458e-93ab-89f1143552ac
Sahu, Sandeep
ec8fe3c7-0daa-48a6-96bd-a7d55397f94a
Chand Yadav, Prabhat, Setia, Prince and Sahu, Sandeep
(2022)
Micro-scratching behavior of heat-treated cutting chips of Inconel 718.
Materials Today Communications, 32, [104007].
(doi:10.1016/j.mtcomm.2022.104007).
Abstract
The present work investigates the micro-scratching behavior of Inconel 718 alloy processed by machining and subsequent heat-treatment. As-machined chips were heat-treated at 700 °C, 800 °C, and 900 °C, all for a short duration of 15 min, followed by water quenching to allow the precipitation of γ
I and γ
II phases. Microstructural analysis of the processed Inconel 718 chips revealed the formation of nano-size precipitates either along the grain boundaries or at the triple junctions, which contributed to the improved mechanical property compared to the solution annealed sample. It was found that the chips heat-treated at 700 °C possessed the highest average hardness (548 Kgf/mm
2) among all the sample conditions. High hardness of as-machined chips and short heat-treatment at 700 °C led bimodal microstructure and precipitation pining resulting in maximum wear resistance compared to other heat-treatment conditions. Subsequently, to verify the outcome, worn surface analysis of as-machined and subsequently heat-treated chips was performed. Comparatively, larger size cracks in sample heat-treated at 900 °C attributed to a high cracking scratch zone in the processed material, i.e., less wear resistance, whereas no/nominal crack in as-machined chips and chips heat-treated at 700 °C attributed to no cracking scratch zone.
Text
Micro-scratching behavior of heat-treated cutting chips of Inconel 718
- Accepted Manuscript
More information
Accepted/In Press date: 11 July 2022
e-pub ahead of print date: 14 July 2022
Published date: August 2022
Additional Information:
Funding Information:
PCY acknowledges the support from Advanced Center for Materials Science (ACMS), IIT Kanpur, for conducting EBSD and scratch tests. SS is thankful to the Royal Society for providing Newton International Fellowship NIF\R1\201789 . The authors also acknowledge Dr. Bhagyaraj Jayabalan at IIT Kanpur for providing a TEM sample preparation facility and fruitful discussion on TEM results.
Publisher Copyright:
© 2022
Keywords:
Heat-treatment, Inconel 718, Mechanical property, Scratch test, Severe plastic deformation, Wear behavior
Identifiers
Local EPrints ID: 472846
URI: http://eprints.soton.ac.uk/id/eprint/472846
ISSN: 2352-4928
PURE UUID: 6001f6b9-9f59-4f14-b7e1-3cdd711b0add
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Date deposited: 20 Dec 2022 17:34
Last modified: 17 Mar 2024 07:35
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Contributors
Author:
Prabhat Chand Yadav
Author:
Prince Setia
Author:
Sandeep Sahu
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