Surface integrity after post processing of EDM processed Inconel 718 shaft

Holmberg, Jonas; Wretland, Anders; Berglund, Johan; Beňo, Tomáš

doi:10.1007/s00170-017-1342-6

Cited by 16 publications

(9 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For PBF-LB parts, both grit blasting and SP can effectively improve the surface smoothness. After SP, the surface roughness is below 2 m m, which is in good agreement with previously reported values (Holmberg et al, 2018). Different from PBF-EB case, HIPing hardly affects the surface roughness of PBF-LB parts, whereas HT results in more than 30% increase in surface roughness.…”

Section: Topographysupporting

confidence: 92%

Effect of post-processing on microstructure and mechanical properties of Alloy 718 fabricated using powder bed fusion additive manufacturing processes

Götelid

Ma²,

Lyphout³

et al. 2021

RPJ

Self Cite

View full text Add to dashboard Cite

Purpose This study aims to investigate additive manufacturing of nickel-based superalloy IN718 made by powder bed fusion processes: powder bed fusion laser beam (PBF-LB) and powder bed fusion electron beam (PBF-EB). Design/methodology/approach This work has focused on the influence of building methods and post-fabrication processes on the final part properties, including microstructure, surface quality, residual stresses and mechanical properties. Findings PBF-LB produced a much smoother surface. Blasting and shot peening (SP) reduced the roughness even more but did not affect the PBF-EB surface finish as much. As-printed PBF-EB parts have low residual stresses in all directions, whereas it was much higher for PBF-LB. However, heat treatment removed the stresses and SP created compressive stresses for samples from both PBF processes. The standard Arcam process parameter for PBF-EB for IN718 is not fully optimized, which leads to porosity and inferior mechanical properties. However, impact toughness after hot isostatic pressing was surprisingly high. Originality/value The two processes gave different results and also responses to post-treatments, which could be of advantage or disadvantage for different applications. Suggestions for improving the properties of parts produced by each method are presented.

show abstract

Section: Topographysupporting

confidence: 92%

Effect of post-processing on microstructure and mechanical properties of Alloy 718 fabricated using powder bed fusion additive manufacturing processes

Götelid

Ma²,

Lyphout³

et al. 2021

RPJ

Self Cite

View full text Add to dashboard Cite

show abstract

“…Before bead-blasting, all but the EDMed surface exhibited compressive residual stresses. Tensile residual stress are often seen in as-built conditions after EDM, which might explain the behavior seen here [49,50]. Further, residual stress in as-received conditions were more compressive in the 0 • asreceived surface (∼−345.07 MPa) compared to the 30 • as-received surface (∼−121.41 MPa).…”

Section: Evolution Of Surface Residual Stresses During Bead-blastingmentioning

confidence: 67%

Effect of Prior Surface Textures on the Resulting Roughness and Residual Stress during Bead-Blasting of Electron Beam Melted Ti-6Al-4V

et al. 2022

View full text Add to dashboard Cite

The finishing of additive manufactured (AM) components is crucial for endowing them with fatigue resistance. Unfortunately, current AM processes naturally promote anisotropic surface characteristics that make it challenging to optimize finishing processes. In this study, bead-blasting is explored as a process for finishing Electron Beam Melted (EBM) Ti-6Al-4V. The effects of anisotropic roughness characteristics on the mechanics of bead-blasting are delineated using surface texture measurements via optical profilometry and residual stress measurements via X-ray diffraction. As-received surfaces resulting from AM, as well as those that have been Electrical Discharge Machined (EDM), are studied. It is seen that pre-processed roughness textures heavily influence the final textures and residual stresses. These linkages are quantified using a plasticity index as the governing metric—a rougher surface features a larger plastic index, which results in comparatively greater evolution of its texture characteristics than a smoother surface after equivalent bead-blasting treatments. The mechanics of this evolution are delineated using energy-controlled indentation as a model representing a single impact in bead-blasting. It is seen that rougher surfaces featuring complex textures in as-received states also produce complex stress states featuring a greater level of locally tensile stresses during indentation compared with smoother surfaces. Approaches to address these complications are proposed that can potentially transform a printed, non-functional surface into one that is optimized for fatigue resistance.

show abstract

“…Metal matrix composite 53) As per Holmberg et al (2018) 53) , the machining of the process enhances the strength of the system based on the contribution of different ranges. Electric discharge machining consists of some matrix composite on the different perspectives of the elements.…”

Section: Fig 4: Electric Discharge Machining Surface Integrity Onmentioning

confidence: 95%

Fabrication and Machining of Metal Matrix Composite Using Electric Discharge Machining: A Short Review

Jain¹,

Kumar²,

Shrivastava³

2021

Evergreen

View full text Add to dashboard Cite

Metal Matrix composite is a metal reinforced with two or more constituents which can be any other materials either metal or non-metal. Metal matrix composites (MMCs), which are inherently intelligent, are lightweight and high-performance, ever-expanding materials. The structural and functional properties of these materials may be modified by industrial requirements. Researchers and the industry are attracted by the process technology used in the production and processing of these products. The hybrid-electric discharge process for MMCs is a promising and the most effective nonconventional process. It has greater expertise in manufacturing complex shapes with greater precision. This paper gives an updated analysis of the development and advantages of various routes for composite manufacturing and machining. It reports on several realistic analyzes and study results, including various manufacturing and processing problems for MMC Since the last few years, hybrid electrical discharge machining has been an active field of research in critical and nonconventional machining. This paper includes annual research in production, traditional machining, unconventional machining, and hybrid MMC machining. The final part of the paper addresses conclusions and future scope.

show abstract

Surface integrity after post processing of EDM processed Inconel 718 shaft

Cited by 16 publications

References 30 publications

Effect of post-processing on microstructure and mechanical properties of Alloy 718 fabricated using powder bed fusion additive manufacturing processes

Effect of post-processing on microstructure and mechanical properties of Alloy 718 fabricated using powder bed fusion additive manufacturing processes

Effect of Prior Surface Textures on the Resulting Roughness and Residual Stress during Bead-Blasting of Electron Beam Melted Ti-6Al-4V

Fabrication and Machining of Metal Matrix Composite Using Electric Discharge Machining: A Short Review

Contact Info

Product

Resources

About