International Journal of Engineering and Physical Sciences 6 2012
Investigations on the Influence of Process
Parameters on the Sliding Wear Behavior of
Components Produced by Direct Metal Laser
C. D. Naiju, K. Annamalai, Siva Prasad Darla and Y. Murali Krishna Abstract—This work presents the results of a study carried out to determine the sliding wear behavior and its effect on the process parameters of components manufactured by direct metal laser
sintering (DMLS). A standard procedure and specimen had been used in the present study to find the wear behavior. Using Taguchi’s experimental technique, an orthogonal array of modified L8 had been developed. Sliding wear testing using pin-on-disk machine was carried out and analysis of variance (ANOVA) technique was used to investigate the effect of process parameters and to identify the main process parameter that influences the properties of wear behavior on the DMLS components. It has been found that part orientation, one of the selected process parameter had more influence on wear as compared to other selected process parameters.
The major advantage of this process is it can use wide range of metal powders such as direct steel, bronze based powder
etc. the Cu-based metal powders are also being used for purity and better surface finishing . The major drawback for this process is the surface finish  and the wear  of the
material. An experimental study on the sliding wear behavior of in situ Cu-TiB2 nano-composites fabricated by the reaction of pure titanium and copper-boron on a pin-on-disk wear tester under dry sliding conditions, rubbing against medium carbon
steel disk at sliding speed ranging from 0.089 to 0.445 m/s and at loads between 20 N and 140 N. From the experiment it was
found that the hardness, yield strength and wear resistance of the composited increased with the content (from 0.5 to 2.5 wt %) of TiB2 nano-particles in the copper matrix .
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