Mechanism of Creation of Compressive Residual Stress by Shot Peening.

Kobayashi, M; Matsui, Toshiharu; Murakami, Yukitaka

doi:10.1299/kikaia.63.1226

Cited by 39 publications

(46 citation statements)

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“…28 As a result of the near-surface deformation in AWJ peening, the jet is expected to introduce a residual stress within the substrate similar to that resulting from shot peening. 25 Therefore, AWJ peening may be capable of providing a surface that supports mechanical interlock of the implant (via cement interdigitation or bone ingrowth) while also extending the component's fatigue strength through development of a near-surface compressive residual stress.…”

Section: Abrasive Waterjet Peeningmentioning

confidence: 99%

Abrasive waterjet peening: A new method of surface preparation for metal orthopedic implants

Arola

McCain

2000

J. Biomed. Mater. Res.

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Abrasive waterjet (AWJ) peening is a new mechanical surface treatment process envisioned for use on metal orthopedic implants. The process utilizes an abrasive waterjet to simultaneously texture and work harden the surface of a metal substrate through controlled hydrodynamic erosion. In this study, a titanium alloy (Ti6Al4V) was subjected to AWJ peening over a range of parametric conditions. The textured surfaces were quantified in terms of the apparent interdigitation volume (V(i)), the effective stress concentration factor (K(t)) posed by the surface topography, and the magnitude of residual stress (sigma(r) ). Topographical features of the prepared surfaces were determined using contact profilometry, and X-ray diffraction was used in evaluating the in-plane residual stress. It was found that a large range in V(i) (9.4-43.8 microm(3)/microm(2)) and K(t) (1.3-2.7) are available through selection of the AWJ peening process parameters. Furthermore, a compressive residual stress (-409 +/- sigma(r) +/- -33) was found to result within the surface of the Ti6Al4V substrates regardless of treatment conditions. When compared to a titanium plasma spray coating used for cementless fixation, the AWJ peened Ti6Al4V exhibited a surface topography with significantly lower effective stress concentration and higher compressive residual stress. Based on results from this study, AWJ peening may serve as a new method of surface treatment for metal orthopedic implants, which supports the development of stable primary fixation and simultaneously enhances the component fatigue strength.

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Section: Abrasive Waterjet Peeningmentioning

confidence: 99%

Abrasive waterjet peening: A new method of surface preparation for metal orthopedic implants

Arola

McCain

2000

J. Biomed. Mater. Res.

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“…The diagrams illustrate how localized dimension changes require the surrounding material to deform elastically to preserve dimensional continuity, thereby creating residual stresses. For example, the upper left panel illustrates shot peening, where the surface layer of a material is compressed vertically by impacting it with small hard balls [8]. In response, the plastically deformed layer seeks to expand horizontally, but is constrained by the material layers below.…”

mentioning

confidence: 99%

Overview of Residual Stresses and Their Measurement

Schajer

Ruud

2013

Practical Residual Stress Measurement Methods

100

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“…For example a compressive residual stress may bring about higher fatigue limit [27]. Therefore we investigated the machining process' influence on the distribution of stress in the workpiece.…”

Section: Residue Stressmentioning

confidence: 99%

Research on the influence of machining introduced sub-surface defects and residue stress upon the mechanical properties of single crystal copper

Chen

Xiao

Jiaxuan

et al. 2010

Sci. China Technol. Sci.

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Large scale molecular dynamics simulations of nanomachining and stretching of single crystal copper are performed to analyze the machining process' influence on the material's mechanical properties. The simulation results show that the machining process will introduce interfacial defects inside the specimen and enhance the compressive stress beneath the surface. Generally speaking, interfacial defects lead to the decrease of the strength limit, while residue compressive stress can enhance the elastic limit and even the strength limit. Various machining parameters are adopted to investigate their influence on the mechanical behavior of machined specimen. Lower cutting speed and smaller cutting depth lead to less defects and greater residue compressive stress, which brings about better mechanical properties. The elastic limit increases by 36.8% under the cutting depth of 0.73 nm and decreases by 21.1% under the cutting depth of 1.46 nm. The strength limit increases by 7.7% under the cutting speed of 100 m/s and decreases by 28.2% under the cutting speed of 300 m/s. nanomachining, deformation, residue stress, molecular dynamics, dislocations Citation:Chen M J, Xiao G B, Chen J X, et al. Research on the influence of machining introduced sub-surface defects and residue stress upon the mechanical properties of single crystal copper.

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Mechanism of Creation of Compressive Residual Stress by Shot Peening.

Cited by 39 publications

References 0 publications

Abrasive waterjet peening: A new method of surface preparation for metal orthopedic implants

Abrasive waterjet peening: A new method of surface preparation for metal orthopedic implants

Overview of Residual Stresses and Their Measurement

Research on the influence of machining introduced sub-surface defects and residue stress upon the mechanical properties of single crystal copper

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