Effects of Tool Wear on Subsurface Deformation of Nickel-based Superalloy

Zhou, Jinming; Bushlya, Volodymyr; Peng, Ru Lin; Johansson, Sten; Avdovic, Pajazit; Ståhl, Jan-Eric

doi:10.1016/j.proeng.2011.11.133

Cited by 66 publications

(27 citation statements)

References 8 publications

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“…3 (c). Published reports in the literature indicate that the structural alteration beneath the surface increased when cutting speed, depth of cut and tool wear are increased [8,9]. In addition, Fig.…”

Section: Plastic Deformationmentioning

confidence: 85%

“…Surface integrity of subsurface and surface layers resulting from machining is crucial for fatigue life improvement [3]. Yet, machining processes including hard turning affects surface integrity and induces microstructural alterations such as surface hardness enhancement resulting from work hardening, plastic deformation, microcracks, white layer formation, recrystallization and tensile thermal residual stresses [1,[4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Hard Turning on Microstructure Evolution in the Subsurface Layers of Inconel 718

Touazine

Jahazi

Bocher

2014

Volume 2A: Advanced Manufacturing

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This study investigated the effects of semi finish, finish and critical finish machining parameters on the microstructural evolution of subsurface layers in Inconel 718. In order to assess the microstructural evolution in the subsurface layer following machining, advanced characterization methods including optodigital microscopy, X-ray diffraction and nanoindentation were used. Results showed that friction between the tool and the workpiece during machining lead to microstructural changes such as hardness enhancement on the surface, and softening on the subsurface. It was also observed that damage in the machined surface is related to the presence of defects such as cracks, cavities and carbide detachment from the surface. Finally, residual stress measurements revealed that, within the investigated parameters, the cutting speed has the most significant effect on surface integrity.

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Section: Plastic Deformationmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Influence of Hard Turning on Microstructure Evolution in the Subsurface Layers of Inconel 718

Touazine

Jahazi

Bocher

2014

Volume 2A: Advanced Manufacturing

View full text Add to dashboard Cite

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“…Zone 1 is highly deformed region due to reason of high mechanical and thermal loading. Zone 2 creates partially deformed and elongated grains while zone 3 is unreformed layer [22]. Proper machining conditions can eliminate such sub-surface deformation in the microstructure.…”

Section: Surface Metallurgymentioning

confidence: 99%

“…Proper machining conditions can eliminate such sub-surface deformation in the microstructure. EBSD is an advance characterization technique to study machined induced deformation providing quantitative information about grain size, orientation as shown in figure 5 [22]. In zone 1, the mis-orientation angles evenly distributed over the grains, whereas the grains are elongated and bent in the cutting direction in zone 2.…”

Section: Surface Metallurgymentioning

confidence: 99%

Machining of Difficult-to-Cut Super Alloys: A Review

2017

IJAERD

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“…In addition, Zhou et al reported that the machining condition specially, tool wear increasing during machining can induce a sever plastic deformation and recrystallization in the subsurface and a degradation of the machined part quality [7].…”

Section: Introductionmentioning

confidence: 99%

Accurate determination of damaged subsurface layers in machined Inconel 718

Touazine

Jahazi

Bocher

2016

Int J Adv Manuf Technol

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The machining of high strength materials used in aeronautical applications generates damage on the subsurface layer which can significantly affect the fatigue life of the machined components. It is then important to distinguish between the damages due to machining from those caused by mechanical polishing operations used for sample observation. In this study, a new method is proposed to characterize and quantify properly the affected layer by machining and eliminate the impact from the defects originated during mechanical polishing. A protective layer of nickel coating was deposited on the machined surface. An optimum thickness of 100 µm was determined for the nickel layer to avoid any damage to the subsurface layer during sample preparation. The subsurface layer was analyzed using an automatic Knoop microhardness machine, laser-digital microscope and Electron BackScatter Diffraction (EBSD) microscopy.

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Effects of Tool Wear on Subsurface Deformation of Nickel-based Superalloy

Cited by 66 publications

References 8 publications

Influence of Hard Turning on Microstructure Evolution in the Subsurface Layers of Inconel 718

Influence of Hard Turning on Microstructure Evolution in the Subsurface Layers of Inconel 718

Machining of Difficult-to-Cut Super Alloys: A Review

Accurate determination of damaged subsurface layers in machined Inconel 718

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