الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Multi-walled carbon nano tubes (MWCNTS) are a cylindrical nano tubes
made of (sp2 ) carbon have structural, thermal, chemical, electronics, and
mechanical properties, and strength is higher than the strength of steel due to the strong bonds between individual atoms of carbon and they have thermal
conductivity and constant resistivity. (MWCNTs) play an important role in
engineering manufacturing. This study seeks to machining of aluminumsilicon workpiece (AA356) that reinforced by three different (MWCNTS) by
volume (0 %, 0.5%, and 1%). Stir casting technique was used for fabricating of
(Al-Si/ MWCNTS) nanocomposite material. Conventional turning process in
dry conditions was applied to accomplish the machining of (30) samples
experimentally on center lathe machine under controllable cutting variables
namely cutting speed, cutting feed rate, depth of cut, and as well as various
three volume fractions of (MWCNTS). Surface roughness (Ra), roundness error
(R), material removal rate (MRR), and cutting temperature (T) were evaluated
results of a machinability. Response surface methodology (RSM) based on
central composite design (CCD) was selected as a method of design of
experiments for optimization. The statistical analysis variance (ANOVA) and Minitab version 18 commercial software were done to analyze the input data. The results indicated that the effect of parameters on (Ra), (R), (MRR), and (T). So, the most influence variable on Ra was feed rate followed by depth, cutting speed and volume fractions of MWCNTs have no significant effects. Parameter has significance on (R) was feed followed by depth. Cutting speed, feed rate, and depth of cut have the same significance on (MRR), and volume fractions of MWCNTs has no effect. Cutting speed factor was the effective variable on (T). Key words: Response surface methodology, Surface roughness, Roundness error, Material removal rate, ANOVA, and MWCNTS.