Naiju C D

Department of Design and Automation

School of Mechanical Engineering

Vellore Campus

M adithan

P radhakrishnan

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

International Journal of Rapid Manufacturing

Direct Metal Deposited (DMD) specimens using Inconel 625 were tested for sliding wear and analysed for reliability. In this study, Taguchi's experimental techniques were used to develop L9 orthogonal array using Design of Experiments (DOE). Three different process parameters, coating thickness, load and temperature were selected for manufacturing the components. Sliding wear test was carried out and wear properties was investigated. Two-parameter Weibull method was used for the reliability studies by which reliability was estimated for different wear values of the manufactured components. The distribution plot on reliability was considered as a good design for Weibull analysis. The study shows that Weibull distribution method can be used for describing the distribution of times to wear properties of rapid prototyped components using DMD for functional applications. © 2019 The Authors. Published by Elsevier Ltd.

Fulltext

Procedia Manufacturing

Sliding Wear Reliability Studies of Inconel 625 Components Manufactured by Direct Metal Deposition (DMD)

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 selective laser sintering (SLS). 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 L4 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 SLS components. It has been found that scan spacing had more influence on wear as compared to other selected process parameters, slice thickness and infiltration.

Advanced Materials Research

Study on the Effect of Process Parameters on Sliding Wear Behavior of Components Produced by Selective Laser Sintering (SLS)

Direct metal laser sintering (DMLS) is one of the methods in layer manufacturing technologies by which metal powder can be directly used to produce both prototype and production tools. The components manufactured by DMLS should have essential hardness for its application in the industry. This study was carried out to determine the optimum process parameters influencing the hardness of the components produced by DMLS. Sintering speed, hatch spacing, post contouring, infiltration and hatch type are the process parameters taken up for study. Statistical design of experiments using Taguchi’s orthogonal array was employed for this study. The experimental data obtained were analyzed using ANOVA. From the results, it is found that one of the process parameters; scan spacing affects the hardness of the parts produced by this technology to a significant extent.

Investigation on the Effect of Process Parameters on Hardness of Components Produced by Direct Metal Laser Sintering (DMLS)

Application of fused deposition modelling components are gaining popularity in functional application. In order to use these components directly for functional application, reliability in service has to be acheived. A Reliability analysis was caried out on components manufactured by fused deposition modelling. A standard test specimen as per ASTM was prepared and tested for fatigue cycles to failure. Bending stress was calculated prior to the fatigue testing by varying the slice thickness. Fatigue test was carried out with differnt loading condition. Fatigue test results were subjected to weibull analysis to determine the reliability of FDM components. The Weibull design values were calculated and Weibull distribution plot for failure was plotted and analyzed. Estimation of reliabilty for different cycles to failure was also found out.

Applied Mechanics and Materials

Reliability of Fused Deposition Modelling (FDM) Components on Fatigue Cycles to Failure Using Weibull Analysis

This work presents the results of a study carried out to determine the reciprocating wear behavior and its effect on the process parameters of components manufactured by selective laser sintering (SLS). 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 L9 had been developed. Reciprocating wear testing 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 SLS components. It has been found that laser power had more influence on wear as compared to other selected process parameters. Micro-structural analysis was also carried out using scanning electron microscope on the wear testing sample.

Journal	International Journal of Rapid Manufacturing
Publisher	Inderscience Publishers
ISSN	1757-8817
Open Access	0