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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

Science and art of ductile grinding of brittle solids

Feb 01, 2021 Achieving the ductile grinding regime is a challenge for these highly brittle materials. Glass is, by definition, structurally amorphous. Silicate glasses with various oxide additives tend to be highly brittle, standing near the top end of Table 1 .

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.

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),

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

Experimental study on ductile-regime micro-grinding

Ductile-regime machining on brittle materials has been researched and had a wide application in optimal industry. Ductile mode and fracture mode are two types of material removal mechanism in grindning brittle materials [2][3]. Firstly, a ductile regime in grinding could be achieved by using a small infeed rate; in 1991, Bifano proposed that

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

(PDF) Dutile Regime Parallel Grinding of BK7

Grinding process, maximum chip thickness, ductile/brittle regime, surface roughness and sub-surface damage have been addressed. Special attention has been given to

Specif ic grinding energy as an in-process control

In ultraprecision grinding of brittle materials, the transition from ductile-regime grinding to brittle-regime grinding that results from an increasing grinding grain depth of cut is accompanied by a reduction in the specific grinding energy. Furthermore, as the grain depth of cut is increased beyond the transition point into purely

Fixed-abrasive grinding of brittle hard-disk substrates

Jul 01, 1997 The grinding contact width is equal to the width of the rim of the cup-shaped grinding wheel (6 mm for our wheels). This grinding technique has recently been employed for ductile-regime ultraprecision grinding of brittle materials by Namba and Abe [17], Yasunaga et al. [18] and Daito et al. [19], among others. Its advantages are simplicity and

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),

(PDF) Dutile Regime Parallel Grinding of BK7

Grinding process, maximum chip thickness, ductile/brittle regime, surface roughness and sub-surface damage have been addressed. Special attention has been given to

Ductile Regime Finish Machining A Review, The

Jul 03, 2000 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

(PPT) Grinding rahul kumar Academia.edu

This process is called ductile regime machining.Mechanism of ductile/ shear mode grinding of brittle materials The ductile surface is the result of material removal due to shearing, where the material is planed off at a micro scale level. Principle of ductile regime machining The transition from brittle to ductile mode during machining of

Anisotropic brittle-ductile transition of monocrystalline

Dec 23, 2020 Ductile-regime grinding of brittle materials: experimental results and the development of a model. Int. Soc. Opt. Photonics 1989;966:108

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

Investigations of the machining of glasses and other

Increased demands for precision components made of brittle materials such as glasses and advanced ceramics, are such that conventional (free abrasive) grinding and polishing techniques can no longer meet the requirements of today's precision manufacturing engineering. Both fast production rates and high quality surfaces of complex shapes are required in addition to the

ductile regime grinding brittle materials in malaysia

ductile regime grinding brittle materials in malaysia. Ductile streaks produced during diamond grinding of hard and brittle materials have aided the subsequent process of polishingWe are a professional mining machinery manufacturer, the main equipment including: jaw crusher, cone crusher and other sandstone equipment;Ball mill, flotation machine, concentrator and other

High speed super abrasive grinding of sintered yttria

Feb 16, 2021 High speed moderate depth super-abrasive grinding of sintered yttria stabilized zirconia (YSZ) using coolant was done in current experiment. Electropl

Christian WIRTZ Team Leader M.Sc. M.Sc

Christian WIRTZ, Team Leader Cited by 21 of RWTH Aachen University, Aachen Read 7 publications Contact Christian WIRTZ

Mechanisms of Material Removal in the Precision Production

Grinding of ceramics is often treated as coarse grinding dominated by brittle fracture or fine grinding, at very low removal rates, dominated by plastic deformation. Through a set of experimental observations and analysis, it is shown that in grinding of ceramics the abrasive/work interaction can be treated similar to well known chip formation

Micromachines Free Full-Text A New Grinding Force

The ability to predict the grinding force for hard and brittle materials is important to optimize and control the grinding process. However, it is a difficult task to establish a comprehensive grinding force model that takes into account the brittle fracture, grinding conditions, and random distribution of the grinding wheel topography. Therefore, this study developed a new grinding

Modeling of ductile-mode material removal in rotary

In rotary ultrasonic machining of ceramic materials there exist two modes of material removal: brittle fracture mode and ductile mode. Two models were developed based on the assumption that the brittle fracture is the dominating mode of material removal, and

Prediction of subsurface damage depth of ground brittle

show brittle regime appearances. The surface roughness was 2.44–3.22 µm Ry. On the other hand, the brittle fractures decreased on the surfaces ground by the 10-µm abrasives. Smooth grinding traces become clearly seen, compared with surfaces machined by the 20-µm diameter abrasives. The surface roughness was 0.67–0.87 µm Ry.

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

Ductile Regime Grinding of Hard and Brittle Materials

As a means to realize ductile regime grinding of an optical glass, a truncation method in which diamond cutting edges are truncated to be aligned on the grinding wheel surface is focused on in order to optimize the truncation conditions. The results are summarized as follows.1. Three-dimensional shape of diamond grain cutting edges was measured using a scanning laser

Ductile or Partial Ductile Mode Machining of Brittle Materials

This paper reports ductile or partial ductile mode machining of silicon, glass and some advanced ceramics. Results are presented using scanning electron micrographs of the machined surfaces. Grinding and lapping operations using inexpensive machine tools could produce ductile streaks on surfaces of these brittle materials under good conditions.

Ductile Regime Finish Machining A Review, The

Jul 03, 2000 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

Critique of materials-based models of ductile machining in

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

Ductile streaks in precision grinding of hard and brittle

Ductile streaks produced during diamond grinding of hard and brittle materials have aided the subsequent process of polishing. Two novel techniques were used to study the formation of ductile mode streaks during diamond grinding (primary process) of germanium, silicon, and glass. In the first technique, aspheric surfaces were generated on Ge

Prediction of subsurface damage depth of ground brittle

show brittle regime appearances. The surface roughness was 2.44–3.22 µm Ry. On the other hand, the brittle fractures decreased on the surfaces ground by the 10-µm abrasives. Smooth grinding traces become clearly seen, compared with surfaces machined by the 20-µm diameter abrasives. The surface roughness was 0.67–0.87 µm Ry.

A deep analysis of ultraprecision technique for brittle

Pages 294 ; This preview shows page 36 38 out of 294 pages.preview shows page 36 38 out of 294 pages.

High speed super abrasive grinding of sintered yttria

Feb 16, 2021 High speed moderate depth super-abrasive grinding of sintered yttria stabilized zirconia (YSZ) using coolant was done in current experiment. Electropl

Christian WIRTZ Team Leader M.Sc. M.Sc

Christian WIRTZ, Team Leader Cited by 21 of RWTH Aachen University, Aachen Read 7 publications Contact Christian WIRTZ

Modeling of ductile-mode material removal in rotary

In rotary ultrasonic machining of ceramic materials there exist two modes of material removal: brittle fracture mode and ductile mode. Two models were developed based on the assumption that the brittle fracture is the dominating mode of material removal, and

(PDF) Effects of abrasive tools on surface finishing under

However, Fig. 4f shows an aspect much more similar to the aspect of ground surfaces using diamond-R wheel. Thus, it can be underlined that material removed by resin-bonded wheel corresponds to a partial ductile regime.The presence of unique regime in resin-bonded grinding may be explained by tow mechanisms.

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

CiteSeerX — Materials

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.