grinding induced depth

PDF Prediction technique of grinding induced subsurface

To rapidly, nondestructively, and accurately predict the grinding induced subsurface damage depth SSD of brittle optical materials, a theoretical model found on indentation fracture mechanics of

Grinding induced damage in ceramics - ScienceDirect

Although grinding is widely used as a productive technique for finishing ceramic components in the manufacturing industry, it often causes damage to the machined components. The exact nature, the manner and the penetration depth of grinding-induced damage are, however, still not clear, leaving many uncertainties and sometimes danger in using ceramics for structural appli ions.Cited by: 170

Cup wheel grinding-induced subsurface damage in optical

May 01, 2019& 0183;& 32;Cup wheel grinding-induced surface and subsurface damage in optical glass BK7 was investigated. A theoretical model of grinding-induced SSD depth considering the ductile-regime effect was applied. A coupled FEM and SPH 3D model was provided to simulate the grinding-induced SSD in optical glass BK7.Cited by: 7

Appli ion of X- ray diffraction to study the grinding

Based on the analysis of the penetration depth of X ray in WC and Co, grazing incidence X-ray diffraction GIXRD showed that the grinding induced preferred crystal growth occurred only in the outmost layer 3.324 nm , but the compressive stress was caused to a certain depth of the subsurface > 756.18 nm .

PDF Effect of grinding parameters on surface roughness and

grinding parameters on SSD depth. Based on the kinematics of grinding process, Li et al. 10 got formulas SR = max c lhi − h i and SSD = max mi − hc i .

Grinding-induced metallurgical alterations in the binder

The resulting residual stress profile is the sum of multiple subsurface changes, such as phase transformation, severe plastic deformation and grain refinement, where it is discerned that the depth profile of the transformed hcp-Co fraction coincides with the grinding-induced residual stress profile.Cited by: 8

PDF Grinding induced subsurface cracks in silicon wafers

In order to assess the depth and nature of grinding induced subsurface cracks in silicon wafers, it is desirable to egorize all the possible crack configurations. This knowledge may help to develop models that can explain the formation of different subsurface cracks. However, to our

Appli ion of X- ray diffraction to study the grinding …

The results showed that grinding induced reorientation and preferred 100 / 10 −10 growth of WC particles occurred in the deformed surface, while the crystallinity of WC 001 increased. Based on the analysis of the penetration depth of X ray in WC and Co, grazing

Grinding-induced residual stress estimation by indentation …

An estimating procedure for grinding-induced residual stress based on the indentation-fracture IF method was proposed by considering a nonuniform distribution of residual stress in the specimen depth. The proposed procedure was applied to gas pressure sintered and pressureless sintered silicon nitride ceramics, which were ground under different grinding conditions. The estimated residual

Grinding Induced Damage in Ceramics - ResearchGate

The exact nature, the manner and the penetration depth of grinding-induced damage are, however, still not clear, leaving many uncertainties and sometimes danger in using ceramics for structural

Experimental study on grinding-induced residual stress in …

Request PDF Experimental study on grinding-induced residual stress in C-250 maraging steel Residual stress plays a significant role in the performance of a part, while the

Investigation into the effect of wheel groove depth and …

2020/1/17& 0183;& 32;This work presents an investigation into the effects of different groove depths and groove widths on grinding performance in creep-feed grinding using grinding wheels with spiral-shaped circumferential grooves inscribed around their surface. These grooves had constant widths of 3.2 and nbsp;mm and 1.7 and nbsp;mm, respectively, allowing for the decoupling of groove depth effects …

Quantitative light-induced fluorescence technology for …

2020/12/26& 0183;& 32;Finally, 13 samples were evaluated. MBworn increased over the grinding depth range with a strong correlation r=0.994, P<0.001 . In conclusion, the fluorescence intensity of the teeth and grinding depth was strongly correlated in the QLF images.

Effect of crystallographic orientation on residual stress …

Request PDF Effect of crystallographic orientation on residual stress induced in micro-grinding In micro-grinding, the effect of material microstructure on residual stress is significant since

3D modeling and simulation of thermal effects during …

The comparison can be made to that extent since the grinding of the side flanks of the V-groove is equivalent to a plane grinding with a smaller cutting depth. First, the temperature remains constant at room temperature until the grinding wheel passes over the measuring point and the maximum temperature is reached directly in the contact zone.

Methods for Detection of Subsurface Damage: A Review …

2018/5/9& 0183;& 32;Lakhdari et al. found that SSD depth induced in ultrasonically assisted grinding was 35% less than the conventional grinding, even the surface quality is worse. It should also be noted that many prediction models revealing the relationship between SSD and surface roughness were based on the quasi-static indentation fracture model proposed by Lawn et al. 64 .

Abusive grinding Cutting Tool Engineering

2014/2/1& 0183;& 32;I’ve worked with several customers coping with grinding-induced, fatigue-related failure. The solution is always the same: Reduce the grinding temperatures. Once they do this, fatigue life returns to normal. Dear Doc: I’m using Barkhausen noise analysis to

Appli ion of X- ray diffraction to study the grinding

Based on the analysis of the penetration depth of X ray in WC and Co, grazing incidence X-ray diffraction GIXRD showed that the grinding induced preferred crystal growth occurred only in the outmost layer 3.324 nm , but the compressive stress was caused to a certain depth of the subsurface > 756.18 nm .

PDF Backside Grinding Induced Stress Measurement by Raman

Measured depth profile of the stress due to the grinding is same as the proposed model. On the other hand, 0.94 MPa homogeneous uniaxial stresses is observed throughout the bulk of silicon slices with damage produced by abrasion6. This indi es that the low level of stress due to grinding damage will extend throughout

Grinding-induced metallurgical alterations in the binder

The resulting residual stress profile is the sum of multiple subsurface changes, such as phase transformation, severe plastic deformation and grain refinement, where it is discerned that the depth profile of the transformed hcp-Co fraction coincides with the grinding-induced residual stress profile.

Experimental Investigation on Grinding-induced Surface

The effect of the grinding parameters, which include mainly grinding depth, abrasive grain size of diamond grinding wheel and grinding direction, on the grinding-induced surface damage of FCC was discussed, finally, the paper drew the conclusions that both increasing of grinding depth and increasing of abrasive grain sizes of diamond wheel can

Deformation induced complete amorphization at nanoscale in

The Al alloy plate developed was mounted on an ultraprecision grinder Okamoto VG401 MKII, Japan , forming a specially designed setup to perform grinding induced by a single diamond grain at nanoscale depth of cut, as illustrated in Fig. 1 a .

Process induced sub-surface damage in mechanically ground

May 28, 2008& 0183;& 32;The depth of grinding grooves measured by atomic force microscope AFM is in the range of 50 to 200 nm. In the dimple regions of RG surfaces, there are strong Si signals with various upward shifts. The stresses related with the up-shifts range from 200 to 600 MPa.

Rhythmic teeth grinding induced by temporal lobe seizures

The authors report the clinical and polygraphic features of rhythmic teeth grinding observed in a patient as the predominant symptom related to temporal lobe seizures during sleep and wakefulness. This observation demonstrates that exceptionally a teeth-grinding event can be not only a parasomnia sleep bruxism but also an epileptic-related

PDF Recovery of microstructure and surface topography of

6, 7 . In DMG, by using ultraprecision grinding machines and grinding wheels with extremely fine diamond abrasives, no micro cracks will be generated in the wafers. In this case, the grinding-induced subsurface damage layer will be extremely thin, consisting of an amorphous layer depth ∼ a few tens of nanometers and dislo ions depth

3D modeling and simulation of thermal effects during

Sep 15, 2020& 0183;& 32;Figure 1 shows a representation of the defined depths of cut and angles. The angle \ \alpha\ is the tilt of the side surfaces in the V-groove in relation to the horizontal surfaces. The lo ion-dependent cutting depth perpendicular to the side surfaces is described by \ \varDelta s\ .Due to the exact adaptation of the groove to the shape of the grinding wheel for a simplified and at the same

Experimentally validated finite element analysis for

Dec 15, 2017& 0183;& 32;Subsurface damages SSD induced during grinding of brittle materials influence mechanical and physical properties of the machined specimen. Experimental evaluation of SSD is very expensive and time consuming due to need for performing various grinding testes in one hand and post-grinding processes such as angle polishing in another hand. Meanwhile, theoretical investigation …

Rapid heating induced ultrahigh stability of nanograined

Randomly oriented grains with an average transversal size of 40 nm and an aspect ratio of 1.7 are found in the topmost surface layer. The transversal grain sizes increased gradually with increasing depth, to about 60 nm at 18 μm depth and 200 nm at 150 μm depth. A weak 111 〈110〉 texture in the nanograined layer was identified.

Quantitative light-induced fluorescence technology for

Various technologies used to objectively determine enamel thickness or dentin exposure have been suggested. However, most methods have clinical limitations. This study was conducted to confirm the potential of quantitative light-induced fluorescence QLF using autofluorescence intensity of occlusal surfaces of worn teeth according to enamel grinding depth in vitro.

Twyman effect mechanics in grinding and microgrinding

In the Twyman effect 1905 , when one side of a thin plate with both sides polished is ground, and is in a state of compressive residual stress, described in terms of force per unit length Newtons per meter induced by grinding, the stress Newtons per square meter induced by grinding, and the depth of the compressive layer micrometers . We describe and correlate experiments on optical

PDF Modeling of depth-induced wave breaking under finite …

depth-induced breaking toward smaller dimensionless depths. Accordingly, for westerly storm conditions in the Wadden Sea interior with a one year return period, white-capping is dominant in deeper regions 2–3 m , whereas depth-induced breaking can dominate locally over the shal-low banks depths < 2 m . Van der Westhuysen et al. 2007

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