Surface modification by machine hammer peening and burnishing

Schulze, Volker; Bleicher, Friedrich; Groche, Peter; Guo, Y. B.; Pyun, Young Sik

doi:10.1016/j.cirp.2016.05.005

Cited by 138 publications

(62 citation statements)

References 160 publications

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“…Especially, a mechanical surface modification exhibits a very high potential for a customised improvement of the performance, resulting from changes in the surface structure and the surface layer. There are three basic effects that are involved in mechanical surface modification processes [5]:…”

mentioning

confidence: 99%

Roller Burnishing of Particle Reinforced Aluminium Matrix Composites

Nestler

Schubert

2018

Metals

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Energy and resource efficient systems often demand the use of light-weight materials with a specific combination of properties. However, these requirements usually cannot be achieved with homogeneous materials. Consequently, composites enabling tailored properties gain more and more importance. A special kind of these materials is aluminium matrix composites (AMCs), which offer elevated strength and wear resistance in comparison to the matrix alloy. However, machining of these materials involves high tool wear and surface imperfections. An approach to producing high-quality surfaces consists in roller burnishing of AMCs. Furthermore, such forming technologies allow for the generation of strong compressive residual stresses. The investigations address the surface properties in the roller burnishing of AMCs by applying different contact forces and feeds. For the experiments, specimens of the alloy AA2124 reinforced with 25% volume proportion of SiC particles are used. Because of the high hardness of the ceramic particles, roller bodies were manufactured from cemented carbide. The results show that roller burnishing enables the generation of smooth surfaces with strong compressive residual stresses in the matrix alloy. The lowest surface roughness values are achieved with the smallest feed (0.05 mm) and the highest contact force (750 N) tested. Such surfaces are supposed to be beneficial for components exposed to dynamic loads.

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mentioning

confidence: 99%

Roller Burnishing of Particle Reinforced Aluminium Matrix Composites

Nestler

Schubert

2018

Metals

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“…These are higher in orthogonal direction to the tool path than parallel to it [5]. Moreover, it is obvious that the smaller the distance of indentation and stepover distance as well as the lower the feed rate are chosen, the more overlap and therefore higher energy is induced [6]. The distance of indentation is influenced by the choice of feed rate and the applied frequency of the actuator's oscillation.…”

Section: Machine Hammer Peeningmentioning

confidence: 99%

Mechanical Functionalisation of Cutting Inserts by Machine Hammer Peening

Reiter¹,

Krall²,

Bleicher³

2017

DAAAM Proceedings

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Modern developments of functional components result in increasing demands on new materials and their characteristics. Therefore, the complexity of machining applications is also rising, and the challenges concerning wear resistance and longer lifetime of cutting tools continue to grow. The focus of this work is on the mechanical functionalisation of cutting inserts made of cemented tungsten carbide with a Ti-Al-N coating. The functionalisation of the cutting tools is caused by machine hammer peening of the cutting insert's rake face in order to influence surface-near layers, which results in material compaction of the treated areas and an inducement of residual compressive stresses.

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“…Alternatively, controlling the surface integrity (e.g., hardness, residual stress) by mechanical treatment is found to be a viable means to adjust the degradation kinetics. As a novel technique alternative to its counterparts, e.g., machining [4], shot peening [5], and laser peening [6], ball-burnishing becomes an attractive process to enhance surface integrity [7]. In this process, a ball compresses and rolls over the rough surface, plastically deforming the near-surface zone, hence resulting in smoother surface, increased hardness, and compressive residual stress.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Surface Integrity in Deep Ball-Burnishing of a Biodegradable AZ31B Mg Alloy

Uddin

Hall

Hooper

et al. 2018

Metals

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Abstract:As an effective and affordable technique, deep ball-burnishing has been applied to induce the plastic deformation of material, thus resulting in an increased surface hardness, compressive residual stress, and finish quality. Recent research shows that the fast degradation of an Mg alloy implant is a prime limiting factor for its success in in vivo human trials. This paper presents a comprehensive investigation into deep ball-burnishing of a biodegradable AZ31B Mg alloy, in order to improve the alloy's surface integrity. A series of experiments using an in-house built burnishing tool with a 10-mm steel ball have been conducted, with a key focus of exploring the influence of the major process parameters-e.g., burnishing force (750-2650 N), feed rate (150-500 mm/min), and step-over (0.05-0.15 mm)-on hardness and finish quality. With the aim of performing a parametric sensitivity study, a three-dimensional (3D) finite element (FE) model is developed to predict the deformation mechanics, plastic flow, hardness, and residual stress. The FE model agrees with the experiment, hence validating the reliability of the model. Results show that while burnishing significantly improves surface integrity compared to the untreated surface, burnishing force and step-over are shown to be dominant. The net material movement dictates generated residual stress (tensile or compressive), often negatively affecting the surface integrity (e.g., surface cracks), which may be responsible for the onset of corrosion. An appropriate burnishing strategy must therefore be planned, in order to achieve the intended process outcome. The resulting surface properties, enhanced by the deep ball-burnishing, are expected to potentially increase the corrosion resistance of AZ31B Mg alloy implants.

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Surface modification by machine hammer peening and burnishing

Cited by 138 publications

References 160 publications

Roller Burnishing of Particle Reinforced Aluminium Matrix Composites

Roller Burnishing of Particle Reinforced Aluminium Matrix Composites

Mechanical Functionalisation of Cutting Inserts by Machine Hammer Peening

Finite Element Analysis of Surface Integrity in Deep Ball-Burnishing of a Biodegradable AZ31B Mg Alloy

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