Title page for etd-0318116-102555


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URN etd-0318116-102555
Author Liang-Yu Chen
Author's Email Address No Public.
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Department Materials and Optoelectronic Science
Year 2015
Semester 2
Degree Master
Type of Document
Language English
Title Electrochemical responses and mechanical properties of Ti-6Al-4V alloys made by 3D printing SLM additive manufacture
Date of Defense 2016-07-14
Page Count 116
Keyword
  • Ti-6Al-4V
  • Mechanical properties
  • Additive manufacture
  • Anisotropy
  • Heat treatment
  • Electrochemical responses
  • Selective laser melting
  • Abstract There is no doubt that additive manufacturing (AM) has been widely applied in industries with high additional values, like industrial design, medicine and aerospace industry. Among of these three applications, medicine industry has the harshest standard. As AM technique, through the secondary processes is a kind of disadvantage to it, it is still necessary to get the proper properties for the harsh standard of biomaterial. This study contains two parts. For the first study part, it is intended to let the as-fabricated SLM (selective laser melting) samples be more suitable for human bio-material field by subsequent heat treatment. The aim of the first study is to reduce the Young’s modulus for avoiding the shielding stress effect. Secondly, we studied the electrochemical performance of the SLM processed samples with or without subsequent heat treatment. Based on our experimental results, the annealing heat treatment at 800oC for 4 hours appears to be the best heating process. This particular process is considered to be the simplest procedure, a treatment at the lower temperature and for the shorter time. The more important aspect is that it can result in better mechanical properties and corrosion resistance ability. For the second study part, it is intended to investigate whether the electrochemical response is anisotropy of the SLM sample orientation or not. The answer is yes. We can find that the Z plane has the worst corrosion resistance as compared with the X and Y planes. It is because that the Z plane contains more holes induced during the SLM process with zigzag path strategy.
    Advisory Committee
  • Che-Hsin Lin - chair
  • Cheng-Tang Pan - co-chair
  • Shian-Ching Jang - co-chair
  • J. C. Huang - advisor
  • Files
  • etd-0318116-102555.pdf
  • Indicate in-campus at 2 year and off-campus access at 2 year.
    Date of Submission 2016-08-10

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