Seminar Details

Seminar Title
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Analysis of Actuation Mechanism in Ti50Ni50-xFex Shape memory alloy
Seminar Type
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Registration Seminar
Department
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Metallurgical and Materials Engineering
Speaker Type
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Student
Speaker Name
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JAGADISH PARIDA ( RollNo : 519MM1002)
Date  &  Time
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14 May 2021  4:15 PM
Venue
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MS team- Registration seminar of Jagadish Parida- Code(ujpjyc7)
Contact
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Prof. Subash Chandra Mishra
Abstract
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The Ni-Ti system has a broad range of applications, in areas as diverse as biomedicine and robotics. This is in large due to the NiTi intermetallic compound, which exhibits the shape memory effect. In addition to this property, the intermetallic compound is also biocompatible, has good mechanical properties and good corrosion resistance. Studies on NiTi has shown that the temperatures at which the shape memory effect occurs are highly sensitive to the exact composition of the non-stoichiometric NiTi. One method of controlling this sensitivity is to add iron as a third element to the system. The ternary Ni-Ti-Fe system has mainly been investigated for low iron contents, as the focus has been on the NiTi shape memory effect, and how to improve it. The effect of iron on the other intermetallic compounds present in the Ni-Ti system and the possible formation of intermetallic compounds containing iron have been widely investigated. In this project, the phase evolution in the ternary Ni-Ti-Fe system has been investigated. This project work is concentrated on the preparation of Ni-Ti-Fe shape memory alloys with the addition of different atomic wt. % of the iron in place of atomic wt. % of nickel through powder metallurgy route. The samples were prepared by the powders of Nickel, Titanium and Iron milled in high energy dual-drive planetary mill (DDPM) for 16 hr for 300 rpm in the ratio of 10:1 and then cold compaction on hydraulic press at 400 rpm and Ar sintering at 1150 °C for 4 hr. The microstructure, the mechanical properties, XRD analysis of the sample of Ni-Ti-Fe was studied. The results of this project prove the possibility of these SMAs obtaining by powder metallurgy– more advantageous from both technical and economic point of view. A beneficial effect on both sintering and homogeneity of the obtained SMAs proved to have a controlled mechanical alloying applied to the powder mixture before compacting and sintering.