ductile regime grinding brittle materials
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ductile regime grinding brittle materials

Ductile-Regime Grinding of Brittle Materials NIST

Jan 01, 1998  Blaedel, K. , Evans, C. and Taylor, J. (1998), Ductile-Regime Grinding of Brittle Materials, Marcel Dekker, Inc., New York, NY (Accessed November 11, 2021)

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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 rather than fracture.

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Ductile regime grinding of glass and other brittle ...

Nov 01, 1990  Ductile regime grinding of glass and other brittle materials by the use of ultrastiff machine tools Wills-Moren, William J. 1990-11-01 00:00:00 ABSTRACT The disadvantages oftraditional methods offorming glass and other brittle materials are discussed and relevant research work into alternative methods are reviewed. The recent work of Cranfield ...

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A review on ductile mode cutting of brittle materials ...

Feb 14, 2018  Brittle materials have been widely employed for industrial applications due to their excellent mechanical, optical, physical and chemical properties. But obtaining smooth and damage-free surface on brittle materials by traditional machining methods like grinding, lapping and polishing is very costly and extremely time consuming. Ductile mode cutting is a very promising way to achieve high ...

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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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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 as opposed to brittle fracture of the material. It has been

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Brittle/Ductile Transition Phenomena Observed in Computer ...

Abstract By using renormalized molecular dynamics(RMD) proposed by the authors, computer simulations of machining defect-free monocrystal silicon of various sizes have been carried out to investigate crack initiation process. The results show that a defect-free monocrystal silicon can be machined in ductile mode to any scale in an absolute vacuum but exhibits brittle-ductile transition ...

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A laboratory study of hydraulic fracturing at the brittle ...

Nov 16, 2021  The transition between brittle and ductile deformation mode in PMMA occurs approximately in the range \(80-110\,^{^\circ }\) C 19,20,21, which provides an essential advantage as a rock-analogue at ...

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Ductile Fracture - Mechanical Behaviour Questions and ...

Ductile Fracture - Mechanical Behaviour Questions and Answers. 15.06.2021 No Comments Ductile Fracture and Brittle Fracture - an overview ...

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Surface Integrity Control During ... - Materials Engineering

Mar 29, 2006  Ductile regime grinding is an important technology for the manufacture of many next generation components made from advanced materials. The application of MEMS (micro-fabricated electro-mechanical systems) technology to integrate a range of sensors, actuators and distributed electronics manufactured from difficult to process materials where ...

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

Dec 23, 2020  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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Predictive modeling of transition undeformed chip ...

Apr 01, 2009  The process parameters (depth of cut, feed etc.) to achieve transition between ductile and brittle modes of material removal have been reported (Blake and Scattergood, 1990, Blackley and Scattergood, 1991, Patten et al., 2005) to be in the micrometer and nanometer regime. Hence ductile-regime machining is categorized as a precision or ultra ...

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Ductile-Regime Grinding of Brittle Materials NIST

Jan 01, 1997  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 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 100% ductile mode machining of brittle materials, machine tools with high-accuracy servomechanisms (resolution 1.25–10 nm), high loop stiffness, and full flood

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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 rather than fracture.

More

Ductile or Partial Ductile Mode Machining of Brittle Materials

regime grinding of brittle materials: experimental results and the. development of a model", Advances in Fabrication and Metrology. ... The criteria for realizing ductile regime grinding ...

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Ductile regime grinding of ferrite with variation of grain ...

Jun 01, 1997  Ductile regime grinding, a new grinding technology for brittle materials, is considered as a solution of this difficult-to-cut materials grinding. It is known that a fracture mechanism of brittle materials is transient to plastic deformation in the region of extremely small depth of

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Brittle/Ductile Transition Phenomena Observed in Computer ...

Abstract By using renormalized molecular dynamics(RMD) proposed by the authors, computer simulations of machining defect-free monocrystal silicon of various sizes have been carried out to investigate crack initiation process. The results show that a defect-free monocrystal silicon can be machined in ductile mode to any scale in an absolute vacuum but exhibits brittle-ductile transition ...

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Study on the Ductile Removal Behavior of K9 Glass with ...

Ductile removal behavior of hard and brittle material in the process of machining has always been a sticking topic. A series of nanoscratch tests of K9 glass were conducted with Berkovich probe on nanoindenter XP to investigate the ductile removal process, material deformation and crack damage. It was found that the scratches surface was free from crack damage in the range of the selected ...

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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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Ductile Fracture - Mechanical Behaviour Questions and ...

Ductile Fracture - Mechanical Behaviour Questions and Answers. 15.06.2021 No Comments Ductile Fracture and Brittle Fracture - an overview ...

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A laboratory study of hydraulic fracturing at the brittle ...

Nov 16, 2021  The transition between brittle and ductile deformation mode in PMMA occurs approximately in the range \(80-110\,^{^\circ }\) C 19,20,21, which provides an essential advantage as a rock-analogue at ...

More

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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Semi-ductile cutting regime technology for machining ...

A 3-D microstructure made of Zerodur glass-ceramic is successfully machined under semi-ductile regime cutting, confirming the feasibility of the proposed technology, and opening-up the potential for micromachining hard-brittle materials such as Zerodur glass-ceramics for commercial applications.

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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 100% ductile mode machining of brittle materials, machine tools with high-accuracy servomechanisms (resolution 1.25–10 nm), high loop stiffness, and full flood

More

Ductile regime grinding of glass and other brittle ...

Nov 01, 1990  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 , Paul Shore

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Ductile and brittle transition behavior of titanium alloys ...

Mar 02, 2018  The ductile to brittle behavior of brittle materials has been extensively investigated previously 25,26, and the ductile machining strategy is widely

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

Jul 02, 2016  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

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Brittle material characters and property - Our Essay Samples

Thus, the predominant material-removal mechanism is plastic-flow rather than fracture. This process is known as ductile-regime grinding. When brittle materials are ground through a process of plastic deformation, a working surface similar to those achieved in polishing or lapping are produced [1] [5].

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Towards understanding the brittle-ductile transition in ...

Jan 26, 2021  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 induced brittle-to-ductile transition, and

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Brittle/Ductile Transition Phenomena Observed in Computer ...

Abstract By using renormalized molecular dynamics(RMD) proposed by the authors, computer simulations of machining defect-free monocrystal silicon of various sizes have been carried out to investigate crack initiation process. The results show that a defect-free monocrystal silicon can be machined in ductile mode to any scale in an absolute vacuum but exhibits brittle-ductile transition ...

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Grinding induced subsurface cracks in silicon wafers

face cracks. This is a very important observation. It points out that when machining brittle materials like silicon, whether the machining is in ductile regime can not be judged by only observing the machined surface. 3.2. Effects of sample location Crystal orientation dependence of subsurface damage for single diamond tool machined silicon

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A laboratory study of hydraulic fracturing at the brittle ...

Nov 16, 2021  The transition between brittle and ductile deformation mode in PMMA occurs approximately in the range \(80-110\,^{^\circ }\) C 19,20,21, which provides an essential advantage as a rock-analogue at ...

More

Ductile Fracture - Mechanical Behaviour Questions and ...

Ductile Fracture - Mechanical Behaviour Questions and Answers. 15.06.2021 No Comments Ductile Fracture and Brittle Fracture - an overview ...

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CN105108608A - Super-smooth surface adaptive machining ...

By means of the method, ductile-regime machining of the hard and brittle materials can be stably completed, extremely high machining efficiency is also achieved, and machined mirror surfaces with Ra ranging from 2 nm to 7 nm can be easily obtained within a

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