Variation in mechanical behavior due to different build directions of Ti6Al4V fabricated by electron beam additive manufacturing technology

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dc.contributor Sharif, Muhammad Ali Rob
dc.contributor.advisor Ladani, Leila J.
dc.contributor.advisor Chou, Y. Kevin Roy, Lalit 2017-03-01T16:53:43Z 2017-03-01T16:53:43Z 2013
dc.identifier.other u0015_0000001_0001427
dc.identifier.other Roy_alatus_0004M_11800
dc.description Electronic Thesis or Dissertation
dc.description.abstract Titanium has always been a metal of great interest since its discovery especially for critical applications because of its excellent mechanical properties such as light weight (almost half of that of the steel), low density (4.4 gm/cc) and high strength (almost similar to steel). It creates a stable and adherent oxide layer on its surface upon exposure to air or water which gives it a great resistance to corrosion and has made it a great choice for structures in severe corrosive environment and sea water. Its non-allergic property has made it suitable for biomedical application for manufacturing implants. Having a very high melting temperature, it has a very good potential for high temperature applications. But high production and processing cost has limited its application. Ti6Al4V is the most used titanium alloy for which it has acquired the title as `workhouse' of the Ti family. Additive layer Manufacturing (ALM) has brought revolution in manufacturing industries. Today, this additive manufacturing has developed into several methods and formed a family. This method fabricates a product by adding layer after layer as per the geometry given as input into the system. Though the conception was developed to fabricate prototypes and making tools initially, but its highly economic aspect i.e., very little waste material for less machining and comparatively lower production lead time, obviation of machine tools have drawn attention for its further development towards mass production. Electron Beam Melting (EBM) is the latest addition to ALM family developed by Arcam, AB® located in Sweden. The electron beam that is used as heat source melts metal powder to form layers. For this thesis work, three different types of specimens have been fabricated using EBM system. These specimens differ in regard of direction of layer addition. Mechanical properties such as ultimate tensile strength, elastic modulus and yield strength, have been measured and compared with standard data available. Besides, these values have been compared among themselves in order to understand the effect of anisotropy due to the production nature. Nano-hardness at local points on the specimens' bodies has also been tested for comparison.
dc.format.extent 95 p.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated.
dc.subject.other Mechanical engineering
dc.title Variation in mechanical behavior due to different build directions of Ti6Al4V fabricated by electron beam additive manufacturing technology
dc.type thesis
dc.type text University of Alabama. Dept. of Mechanical Engineering Mechanical Engineering The University of Alabama master's M.S.

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