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 …

Brittle materials fail by sudden fracture (without any warning such as necking). Energy absorbed by ductile materials before fracture under tensile testing is more. Brittle materials absorb very small energy before fracture. Various metal forming operations (such as rolling, forging, drawing, bending, etc.) can be performed on ductile materials.

Bifano, Ductile-Regime Grinding of Brittle Materials, UMI Dissertation Services, Ann Arbor, Michigan, USA, 1988. 21. M. Miyashita, "Brittle/ductile machining", Fifth International Sem- The author would like to thank Professor V. C. Venkatesh and inar on Precision Engineering, Monterey, CA, USA, 1989. Dr Erning Wihardjo for their cooperation ...

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 …

On the base of these analysis, study of ductile-regime grinding mechanisms, matching performance between ultrasonic vibration and grinding parameters are discussed for UAG of hard and brittle materials. In addition, future prospect about research areas worth paying more attention to during UAG is analyzed.

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

regime grinding of brittle materials: experimental results and the development of a model", Advances in Fabrication and Metrology for Optics and …

Therefore, an investigation of the material behavior and critical depth of ductile to brittle transition (DBT) is essential for improving high precision and quality grinding HP-SiC ceramics. In this paper, single-grit grinding experiments with different scratch speed were conducted to study strain rate effect on the critical depth of DBT.

Ductile Regime Grinding: A New Technology for Machining Brittle Materials," ASME J. Eng. Ind., 113, pp. ... A Study on Combined Vibration Drilling by Ultrasonic and Low-Frequency Vibrations for Hard and Brittle Materials," Precis. Eng., 22, No. 4

The delayed ductile–brittle transition under the magnetic field also demonstrated the anisotropic feature where the length of the ductile-mode regime varied with magnetic-direction angles. The longest ductile-mode regime occurred when the magnetic field direction was perpendicular to the cutting direction (i.e., the 90° orientation).

Ductile-regime grinding of brittle materials: experimental results and the development of a model. TG Bifano, TA Dow, RO Scattergood. Advances in fabrication and metrology for optics and large optics 966, 108-115., 1989. 83. 1989. Extended depth-of-field microscopy with a high-speed deformable mirror.

Purpose - The need for an instrumented grinding system that addresses the requirements of ductile regime machining of brittle materials is implemented. The static and dynamic stiffness of the structural loop of the grinding system meets or exceeds those of previous researchers.

N2 - 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 were published previously.

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-

Ductile regime grinding of glass and other brittle materials by the use of ultrastiff machine tools Wills-Moren, William J. 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 …

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 …

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 …

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 grinding or removal rates.

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 …

This study suggests that at high temperatures, permeability enhancement in a brittle–ductile deformation regime (Fig. 1) is feasible, offering new insights into rock-fluid mechanics, with ...

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.

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. This paper reviews current state of research and development in ductile regime …

Supplement Vo!. 12 No.2, 2004 Precision Grinding of Hard and Brittle Materials Fig. 2: High speed jig grinding of silicon and glass Two grinding wheel bond types, metal and resinoid, each with three different grit sizes, 10-30 mm, 40-60 mm and 50-70 mm were used in generating aspheric surfaces using the grinding zone method.

Effect of cutting edge truncation on ductile-regime grinding of hard and brittle materials by Xijun Kang, Jun'ichi Tamaki, Akihiko Kubo International Journal of Manufacturing Technology and Management (IJMTM), Vol. 9, No. 1/2, 2006 Abstract: Cutting edge truncation is a micro-truing process in which the diamond cutting edges of a grinding wheel are truncated and aligned at …

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. Liu et al. (2005) studied the nanometre-scale ductile cutting character on soda-lime glass and found the critical value when the material removal mechanism ...

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.

12%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 …

for grinding of brittle materials was not available in the literature, and thus it was conducted by Sun et al. [13]. Parallel grinding with a much higher material-removal rate (MRR) in the ductile regime is found to be possible than cross grinding. Conventional grinding of BK7 glass usually leads to brittle fractured surfaces with severe sub ...

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 …

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

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.

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.

Title: Ductile-Regime Grinding of Brittle Materials: Author: Bifano, Thomas Gary: Advisors: Thomas A. Dow, Chair Ron O. Scattergood, Member John Bailey, Member

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, …

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 ...