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Comparison of Materials for Use in the Precision Grinding ...

The ductile grinding of optical materials is a rapidly evolving process. Ductile regime grinding is the technology of grinding brittle materials at material removal rates and depth of cuts that allow for predominantly ductile removal of material …

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Pilot experimental verification - Mechanistic cutting ...

A physics-based mechanistic model to predict the cutting force for RUM of rocks has been developed considering the ductile mode and brittle fracture mode removal of rock under the indentation of a single abrasive particle and input variables. Rock material removal mechanisms were analyzed by using nano-dynamic mechanical analysis and ...

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Atomistic insights on the nanoscale single grain ...

Bifano, T. A. Dow, and R. O. Scattergood, " Ductile regime grinding: A new technology for machining brittle materials," Journal of Engineering for Industry 113, 184 ...

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Grinding | Fracture | Dislocation

3. B. K. A. Ngoi and P. S. Sreejith,"Ductile Regime Finish Machining – A Review" 4. H. Yoshikawa, Brittle–ductile behavior of crystal surface in finishing, Journal of JSPE 35 (1967) 662–667 5. Nakamura, Tsunetaka Sumomogi and Takayuki Goto, "Study on Ductile Mode Grinding of Brittle Materials using Single Abrasive Grain" 6.

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T. G. Bifan o Department of Aerospace and Mechanical ...

brittle-to-ductile transition in terms of the material properties of the workpiece and the rate of material removal. In this paper, three aspects of the research are described: 9 Development of a grinding apparatus capable of ductile-regime grinding on brittle materials. The relevant design features include: — Machine configuration

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Study on grinding force modelling and ductile regime ...

Ductile regime grinding, proposed by Bifano, is an important method for achieving high quality surfaces of hard brittle materials (1991). Bifano also gave a theoretical description of the ductile grinding condition of different brittle materials, pointing out that ductile-regime grinding could be achieved by a small feed rate.

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Ductile-Regime Grinding Of Brittle Materials: Experimental ...

Ductile-regime grinding is a new technology made possible by the use of real-time control and precision engineering in the grinding process. By ensuring that the abrasive grinding forces do not exceed a threshold value, it is possible to grind materials that are normally considered "brittle" in such a way that the material removal takes place through plastic deformation …

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Towards understanding the brittle-ductile transition in ...

The brittle-ductile transition (BDT) widely exists in the manufacturing with extremely small deformation scale, thermally assisted machining, and high-speed machining. This paper reviews the BDT in extreme manufacturing. The factors affecting the BDT in extreme manufacturing are analyzed, including the deformation scale and deformation temperature …

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Ultraprecision machining of micro-structured functional ...

It is widely known that ductile regime machining should be maintained in machining of the brittle material in order to achieve a high quality finish. According to the hypothesis of ductile regime machining, all brittle materials undergo a transition from the brittle to the ductile machining region at a critical undeformed chip thickness.

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To analyze saw slicing properties and measure surface roughness, we use SEM to measure chip formation of ceramic materials. These methods can help us to know the brittle fracture mode and ductile regime grinding mode in ceramic materials remove modes. Finally, we condition parameters to gain ductile regime grinding mode of slicing ceramic ...

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Ductile-Regime Grinding of Brittle Materials | NIST

Ductile-Regime Grinding of Brittle Materials. Published. January 1, 1997. Author(s) Kenneth Blaedel, John S. Taylor, Christopher J. Evans. Abstract Under appropriate conditions, brittle materials may be ground to produce surfaces with no observable fracture damage. This chapter reviews the techniques for producing such surfaces and the ...

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Ductile-Regime Grinding | Grinding (Abrasive Cutting ...

Grinding of (5) brittle materials under conditions that allow predominantly Fracture Energy jzf ductile material-removal is a new technology known as ductileConsequently, as the scale of machining decreases, plastic flow regime grinding, which is the subject of this paper. becomes an energetically more favorable material-removal mechanism.

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(PDF) Analytical modeling of ground surface topography …

Fig.8 Schematics of the material remova l mechanism in the brit tle grinding mode of brittle materials (PCZ: potential chipping zone) Except for the powder regime, it …

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[PDF] Ductile-Regime Grinding: A New Technology for ...

DOI: 10.1115/1.2899676 Corpus ID: 29030160. Ductile-Regime Grinding: A New Technology for Machining Brittle Materials @article{Bifano1991DuctileRegimeGA, title={Ductile-Regime Grinding: A New Technology for Machining Brittle Materials}, author={Thomas G. Bifano and Thomas A. Dow and Ronald O. Scattergood}, journal={Journal of Engineering for Industry}, …

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Ductile to Transitions in Plastics

Ductile to Brittle Transitions The Madison Group 608‐231‐1907 ꞏ Source: "Ductile-To-Brittle Transition of Plastic Materials II", Advanced Materials and Processes, ASM International, February 2007, pg. 25-27 Strain Stress Ductile

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Grinding of hard and brittle materials | Semantic Scholar

Grinding of hard and brittle materials. Abstract The applications of hard and brittle materials, typically represented by advanced ceramics, for a number of high-performance components have recently generated high interest. To meet this increasing demand, high efficiency machining technologies are needed.

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Ductile or partial ductile mode machining of brittle materials

For the ductile mode grinding of hard and brittle materials, the critical machining depth ranges from 50 nm to 1 m [20]. To perform ductile mode machining of brittle materials, machine tools with high-accuracy servomechanisms (resolution 1.25–10 nm), …

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Ductile-Regime Grinding: A New Technology for Machining ...

This process is known as ductile-regime grinding. When brittle materials are ground through a process of plastic deformation, surface finishes similar to those achieved in polishing or lapping are produced. Unlike polishing or lapping, however, grinding is a deterministic process, permitting finely controlled contour accuracy and complex shapes.

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On the design and implementation of an instrumented ...

This process is known as ductile-regime grinding. When brittle materials are ground through a process of plastic deformation, surface finishes similar to …

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Ductile and brittle transition behavior of titanium alloys ...

The ductile to brittle behavior of brittle materials has been extensively investigated previously 25,26, and the ductile machining strategy is widely adopted to improve surface finishing of the ...

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Ductile Regime Finish Machining - A Review, The ...

Ductile regime the ductile regime grinding of brittle materials could be achi- turning based on plastic deformation is due to phase transform- eved by ensuring that the grinding apparatus has a stiff struc- ations to an amorphous state and deformation related to the tural loop, with real-time control of the grinding infeed and a {111} k110l ...

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The mechanism of ductile deformation in ductile regime ...

Silicon Carbide (SiC) is a material with excellent mechanical and electrical properties. Much attention has been paid to the ductile regime machining of SiC in recent years, but there is still controversy regarding the mechanism of its …

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A critical energy model for brittle–ductile transition in ...

The ability to predict the critical depth for ductile-mode grinding of brittle materials is important to grinding process optimization and quality control. The traditional models for predicting the critical depth are mainly concerned with the material properties without considering the operation parameters.

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Ductile-Regime Grinding of Brittle Materials | NIST

Blaedel, K., Evans, C. and Taylor, J. (1998), Ductile-Regime Grinding of Brittle Materials, Marcel Dekker, Inc., New York, NY (Accessed December 5, 2021)

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Study of the material removal mechanism of glass-ceramics ...

two main processing techniques used on hard and brittle materials: ductile-regime grinding and brittle-regime grinding.4,5 Compared with theductile-regimegrinding, brittle-regime grindingtendstocausesur-faceandsub-surfacedamage in themachinedworkpiece. Assuch, mill-

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CiteSeerX — Nano finish grinding of brittle materials ...

Recent developments of ductile mode machining of hard and brittle materials show that plastically deformed chip removal minimizes the subsurface damage of the workpiece. When chip deforma-tion takes place in the ductile regime, a defect-free nano-surface is possible and it completely eliminates the polishing process.

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Critical Depth of Cut and Specific Cutting Energy of a ...

As the cutting depth increases, groove geometry clearly reveals the ductile-to-brittle transition from the plastic deformation to a brittle fracture state. The material size effect in the ductile region as well as the transition in scribing behavior is well reflected by change in the specific cutting energy.

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Ductile Grinding of Brittle Materials - ResearchGate

For brittle materials, single-point machining was used to fabricate high-precision components for reflective mirrors and infrared detector optics. The ductile-to …

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Subsurface damage in precision ground ULE® and Zerodur ...

2.1 Brittle materials. Ductile or brittle fracture mode grinding can be used to machine brittle materials such as Zerodur ® and ULE ®. Ductile mode grinding has been reported to give low SSD . However, achievable material removal rate is low, as for example the critical depth of cut is ~50 nm on Zerodur ® . Higher manufacturing rates are ...

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A review on the current research trends in ductile regime ...

12%Ductile regime machining is an alternative method for polishing of brittle materials to obtain a high quality surface finish by a ductile or plastic material removal process. Hence, there is a growing interest to study ductile regime machining over several decades.

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Study of the material removal mechanism of glass-ceramics ...

With increases in the grinding depth, there are two main processing techniques used on hard and brittle materials: ductile-regime grinding and brittle-regime grinding. 4,5 4. Wasmer K, Ballif C, Pouvreau C et al. Dicing of gallium–arsenide high performance laser diodes for industrial applications: part I. Scratching operation. J. Mater. Process.

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Ductile regime grinding of glass and other brittle ...

1 November 1990 Ductile regime grinding of glass and other brittle materials by the use of ultrastiff machine tools William J. Wills-Moren, Keith Carlisle, Patrick A. McKeown, …

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