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Content Provider | Inflibnet-Shodhganga |
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Advisor | Selladurai,V. |
Organization | Anna University |
Researcher | Muthukumaran, V. |
Abstract | Medical science makes extensive use of biomaterials and biomedical devices throughout the body because human longevity and health often depends on these devices. The range of biomaterials has significantly extended from synthesized materials of metals and ceramics to polymers. A detailed study on the surface treatments revealed that ion implantation and salt bath nitrocarburizing and post oxidation process known as QPQ process are well-suited to improve the surface properties of AISI 316L SS. The present study was primarily undertaken to investigate the effects of implantation of four various ions on AISI 316L SS. Based on the detailed literature survey the following four ions were selected for the implantation in AISI 316L SS: organ, nitrogen, helium and oxygen. These ions were implanted with 100 keV ion beam energy, dose 1X1017 ions/cm2 and beam current density 1µA/cm2. The corrosion studies were done on these virgin and implanted samples and the results revealed that the implanted samples are more corrosion resistant when compared to the virgin one. The hardness test which was conducted both on the virgin and implanted samples revealed that the implanted samples are harder than the virgin one. In addition to the objective of improving the surface properties by QPQ process, the study was also aimed at predicting mechanical properties related to the various QPQ process variables. In order to achieve the above objective, statistical mathematical models were developed to give the empirical relationship between the mechanical properties and the important QPQ process control variables. All these aspects of the investigation proved to be very useful in improving the surface properties of AISI 316L SS using Ion implantation and QPQ process and also in predicting parameters of QPQ process, which determine the required level of mechanical properties. |
Language | English |
Publisher Department | Faculty of Mechanical Engineering |
Publisher Place | Chennai |
Access Restriction | Open |
Subject Keyword | Aisi 316l Stainless Steel, Biomedical Applications, Ion Implantation, Qpq Processes, Nitrocarburizing, Nitrogen, Helium, Oxygen. |
Content Type | Text |
Educational Degree | Doctor of Philosophy (Ph.D.) |
Resource Type | Thesis |
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