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Cemented carbide cutting tools containing a high percentage of cobalt binder (9-13%) are used for rough machining applications involving interruptions, owing to their high fracture toughness. However, these tools are prone to deformation under such conditions. A design approach can be effectively used to develop a coating scheme which optimizes the critical properties of such coatings for improved...
Surface residual stresses due to turning operations in AISI 304 type stainless steel were studied as a function of machining speed, feed rate, depth of cut, and tool geometry and coating. Residual stress tensors were determined using X-ray diffraction technique. The effects of turning conditions and tool on the residual stresses were discussed in terms of mechanically and thermally induced non-homogeneous...
The surface integrity of the machined component has received greater attention over the last 20 years, especially in relation to high performance materials. Due to the inherent differences between abrasive machining and single point cutting, distinct surface texture patterns will be produced, which together with the associated metallurgical alterations can lead to substantial variations in component...
Nickel-based alloys can be machined using techniques similar to those employed to cut ferrous materials, however, additional requirements are imposed due to the poor machinability of these alloys. Through a series of cutting tests, the authors have applied techniques to optimise the cutting conditions for high speed steel circular saw blades machining materials from three principal categories of nickel-based...
Experimental data has shown that calcium containing resulphurised free machining austenitic stainless steel has much better machinability than resulphurised free machining austenitic stainless steel, especially in terms of tool life. A thick adhering layer has been found on the rake and flank faces of a WC-TiC-Co cutting tool when machining calcium containing resulphurised austenitic stainless steel...
In order to clarify further the formation of an adherent layer on a cutting tool when machining a calcium deoxidized low sulphur content austenitic free machining stainless steel, the deformation and crack propagation around inclusions were monitored dynamically using a micro-cutting device in a scanning electron microscope. The temperature distribution field within a cutting tool under conditions...
An experimental study was conducted to determine the influence of material properties on the surface integrity and texture that results from abrasive waterjet (AWJ) machining of metals. A microstructure analysis, microhardness measurements, and profilometry were used in determining the depth of plastic deformation and surface texture that result from material removal. Models now available for dry...
The influence of cutting parameters and material properties on the residual stress fields resulting from abrasive waterjet (AWJ) machining of metals was analyzed. The measurement and evaluation were conducted using X-ray diffraction with the sin 2 ψ and X-ray integral method (RIM) of analyses. For all materials and cutting conditions, a significant bi-axial compressive residual stress was...
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