Experimental and Numerical Analysis of the Surface Integrity resulting from Outer-Diameter Grind-Hardening

Kolkwitz, B.; Foeckerer, Tobias; Heinzel, Carsten; Zaeh, Michael F.; Brinksmeier, E.

doi:10.1016/j.proeng.2011.11.104

Cited by 27 publications

(6 citation statements)

References 4 publications

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“…19 Thus, grinding can induce noticeable surface hardening. 20 Matsumoto et al 21 reported that appropriate hardening is beneficial to restrain the initiation and propagation of fatigue crack. Thus, ground samples have advantages over milled samples in the surface hardening.…”

Section: Surface and Subsurface Microhardnessmentioning

confidence: 99%

Effects of process combinations of milling, grinding, and polishing on the surface integrity and fatigue life of GH4169 components

Quan

Chen

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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The nickel-based superalloy GH4169 is widely applied in the aviation industry due to its outstanding mechanical properties. However, many blades of GH4169 are still produced by milling and manual polishing, which is costly and unreliable. In this article, GH4169 superalloy components manufactured with combination processes of milling, grinding, and polishing were comparatively studied involving surface integrity and fatigue performance. Test results indicate that the final polishing is the most dominant process that influences the high-cycle fatigue life of GH4169 components. Samples produced via cubic boron nitride grinding and numerical control polishing with a diamond-rubber wheel exhibit fatigue limits of 150 MPa higher than the milled and manually polished samples. Cubic boron nitride grinding induces a considerable compressive residual stress profile with a magnitude of -930 MPa and a depth of 200 μm. Milling induces a typical “hook” residual stress profile with 318 MPa at the surface. Polishing affects the machined surface by two ways, the removal effect and the squeezing effect. The squeezing effect induces a shallow compressive residual stress with approximately −1000 MPa, therefore improves the surface condition. However, inevitable omissions, scratches, texture disorders, and knock marks in hand-polishing are the main causes of the unstable high-cycle fatigue life of hand-polished components.

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Section: Surface and Subsurface Microhardnessmentioning

confidence: 99%

Effects of process combinations of milling, grinding, and polishing on the surface integrity and fatigue life of GH4169 components

Quan

Chen

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…For the process combination the additional hardening process and the logistics are completely eliminated saving time, energy and production costs (Zäh et al 2009). Figure 8.13 (right) shows the results of hardness measurements as reported in Kolkwitza et al (2011).…”

Section: Combinations With Grindingmentioning

confidence: 99%

Productivity Improvement Through the Application of Hybrid Processes

Lauwers

Klocke

Klink

et al. 2014

Lecture Notes in Production Engineering

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Many parts require high strength materials, exhibiting high temperatures or where formability should be reduced, requiring new processing technologies. The application of hybrid manufacturing processes can answer the needs. This paper gives first a classification of hybrid manufacturing processes, followed by a description of various productivity improvements. The latter is also demonstrated by various examples in cutting, grinding, forming and chemical & physical processes like EDM, ECM and laser.

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“…As a result, the interaction between abrasive grits and different phases will generate different mechanical properties (Nguyena et al, 2014). Some numerical methods have been developed to analyze the thermo-metallurgical or thermo-mechanical effects during grind-hardening, such as transient temperature distribution, micro-structural transformation, part distortions and surface integrity (Brinksmeier et al, 2003;Foeckerer et al, 2012Foeckerer et al, , 2013Kolkwitz et al, 2011aKolkwitz et al, , 2011bMahdi and Zhang, 2000;Nguyen and Zhang, 2011;Zaeh et al, 2009). Duscha et al (2011) modeled and simulated the change of material properties as a function of temperature and phase history during grinding.…”

Section: Introductionmentioning

confidence: 99%

Material phase transformation at high heating rate during grinding

Zhou

Steven

2016

Machining Science and Technology

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The modeling of maraging steel phase transformation in grinding process is presented in this article. Specifically, heating rate and contact zone temperature are examined to quantitatively link material properties, wheel topography characteristics and process parameters to the kinetics of diffusion-controlled transformation and diffusionless transformation. Physics-based modeling and prediction for the volume fractions of phase transformation in continuous heating under anisothermal conditions are developed based upon the addition of volume fractions in sequential segmented isothermal processes of grinding. The predictive model is validated by 18Ni (250) maraging steel grinding experiments, X-ray diffraction measurements and regression analyses.Results are compared to the model predicted of martensite and ferrite phase volume fractions after grinding. The physics-based model is experimentally validated as viable to predict the occurrence and extent of phase transformation related to material properties, wheel topography and grinding thermal-mechanical loading. Finally, correlation analysis is used to quantify the importance of the input variables to both model-predicted and X-ray diffraction measured phase transformation results.

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Experimental and Numerical Analysis of the Surface Integrity resulting from Outer-Diameter Grind-Hardening

Cited by 27 publications

References 4 publications

Effects of process combinations of milling, grinding, and polishing on the surface integrity and fatigue life of GH4169 components

Effects of process combinations of milling, grinding, and polishing on the surface integrity and fatigue life of GH4169 components

Productivity Improvement Through the Application of Hybrid Processes

Material phase transformation at high heating rate during grinding

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