Abrasive Water Jet Machining – The Review
Abrasive water jet machining (AWJM) is a relatively new machining technique. Abrasive Water Jet Machining is extensively used in many industrial applications. AWJM is a nonconventional machining process where material is removed by impact erosion of high pressure high velocity of water and entrained high velocity of grit abrasives on a work piece. There are so many process parameter affect quality of machined surface cut by AWJM. Important process parameters which mainly affect the quality of cutting are traverse speed, hydraulic pressure, stand of distance, abrasive flow rate and types of abrasive. Important quality parameters in AWJM are Material Removal Rate (MRR), Surface Roughness (SR), kerf width, tapering of kerf. This paper reviews the research work carried out so far in the area AWJM.
Effects of process parameters on responses during Machining Ti6Al4V Alloy using Abrasive Water Jet Machining
Abrasive water jet machining (AWJM) is one of the recent non-traditional methods that have been used in industry for machining of different materials in a variety of applications. Material removal in this process is due to the erosion of a small volume with each abrasive particle striking the surface at high velocity. It is highly suitable for ceramics and composite materials. Composite materials are being increasingly used in various applications like space, aircraft, marine, architectural and automobile sector because of their superior physical and mechanical properties even though they are a little bit costly. There are so many process parameter affect quality of machined surface cut by AWJM. Important process parameters which mainly affect the quality of cutting are traverse speed, hydraulic pressure, stand of distance, abrasive flow rate and types of abrasive. Abrasive water jet machining provides some advantages over other machining process for cutting the composite materials like no thermal effect, high machining versatility and small cutting forces. In this paper some of the significant parameters are selected and then are studied by using Taguchi’s signal to noise ratio method to find out the optimum working values of those parameters out of the selected values at different levels. For the optimum values of different responses both these graphs and values are compared.
On the Modeling of Surface Waviness Produced by Abrasive-Waterjets
A simple physical model was developed to describe the waviness (striation) phenomenon associated with abrasive-waterjet cutting. Model predictions were compared to experimental surface waviness data showing good qualitative agreement. Quantitative discrepancies were observed, however, and were attributed to kerf taper effects. When experimental kerf taper data were also included, good quantitative agreement was observed. This suggests that the inclusion of kerf width variation in the model will result in an accurate model. The basic AWJ waviness model is expressed as: 
 
$${{2{R_w}} \over {{d_m}}} = 1 - \sqrt {1 - {{\left( {{\pi \mathord{\left/ {\vphantom {\pi 4}} \right. \kern-\nulldelimiterspace} 4}} \right)}^2}{{\left[ {{{{d_m}\left( {h - {h_c}} \right)u} \over {0.5{m_a}{{V_a^2} \mathord{\left/ {\vphantom {{V_a^2} \varepsilon }} \right. \kern-\nulldelimiterspace} \varepsilon }}}} \right]}^2}}$$