Deformation mechanisms and constitutive modeling for silicon nitride undergoing laser-assisted machining

Material deformation behavior has been studied for silicon nitride containing 10 wt% of YSiAlON glass under laser-assisted machining (LAM). Material removal mechanisms were inferred from scanning electron microscopy observations of the chips, and the shear zone stress was determined using three-dimensional machining theory with a new approach to determining shear angles for segmented chips formed in LAM. The effects of operating conditions on the shear zone stress were determined from an experimental parametric study, and the results were used to develop a constitutive equation for the deformation process.

[1]  R. Duclos,et al.  Superplastic behavior of low-doped silicon nitride , 1997 .

[2]  M. C. Shaw.  Metal Cutting Principles , 1960 .

[3]  Y. Shin,et al.  Experimental Investigation of Thermo-Mechanical Characteristics in Laser-Assisted Machining of Silicon Nitride Ceramics , 1999, Manufacturing Science and Engineering.

[4]  K. Bowman,et al.  Texture and Anisotropy in Silicon Nitride , 1992 .

[5]  R. Loehman.  Preparation and Properties of Yttrium-Silicon-Aluminum Oxynitride Glasses , 1979 .

[6]  James F. Shackelford,et al.  Introduction to materials science for engineers , 1985 .

[7]  Yung C. Shin,et al.  Transient, three-dimensional heat transfer model for the laser assisted machining of silicon nitride: I. Comparison of predictions with measured surface temperature histories , 2000 .

[8]  M. Matthewson,et al.  Mechanical properties of ceramics , 1996 .

[9]  Y. Shin,et al.  Surface Temperature Measurement in Laser-Assisted Machining Processes , 1997 .

[10]  T. J. Davies,et al.  Strain hardening and grain elongation during superplastic deformation of ceramics , 1995 .

[11]  F. Lange.  Dense Si3N4 and SiC: Some Critical Properties for Gas Turbine Application , 1972 .

[12]  Albert J. Shih,et al.  Finite Element Simulation of Orthogonal Metal Cutting , 1995 .

[13]  F. Lange.  Silicon nitride polyphase systems: fabrication, microstructure, and properties , 1980 .

[14]  Y. Shin,et al.  Thermo-mechanical modeling of orthogonal machining process by finite element analysis , 1999 .

[15]  G. Barrow,et al.  On the Stress Distribution Between the Chip and Tool During Metal Turning , 1989 .

[16]  Theodore J. Reinhart,et al.  Engineered materials handbook , 1987 .

[17]  G. A. Gogotsi,et al.  Deformation and strength of engineering ceramics and single crystals , 1995 .

[18]  J. Heinrich,et al.  Relationships between processing, microstructure and properties of dense and reaction-bonded silicon nitride , 1987 .

[19]  E. Usui,et al.  Analytical Prediction of Three Dimensional Cutting Process—Part 2: Chip Formation and Cutting Force with Conventional Single-Point Tool , 1978 .

[20]  Sylvia M. Johnson,et al.  Grain‐Boundary‐Phase Crystallization and Strength of Silicon Nitride Sintered with a YSlAlON Glass , 1990 .

[21]  M. C. Shaw,et al.  Mechanics of Machining: An Analytical Approach to Assessing Machinability , 1989 .

[22]  James Lankford.  High strain rate compression and plastic flow of ceramics , 1996 .