Development of Low-cost Casting Titanium Alloys
Author | : Zhi Liang (Ph. D. in materials science) |
Publisher | : |
Total Pages | : 139 |
Release | : 2018 |
Genre | : Lightweight materials |
ISBN | : |
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The other involved ternary titanium alloy system, Ti-Al-Fe ternary system, was investigated with CALPHAD method first to determine target compositions and desired phases, and then characterized experimentally with scanning electron microscopy (SEM) in order to establish the relationship between process parameters and microstructure. Based on the combining results from CALPHAD and selected experiments, a new Ti-Al-Fe casting titanium alloy was designed and produced with induction melting. Microstructure characterization and mechanical property testing were conducted to examine the potent of this new alloy and establish the preliminary structure-property relationship in the as-cast condition. Besides regular scanning electron microscopy (SEM), transmission electron microscopy (TEM) was also applied to investigate the effect of certain nano-size microstructural features linked to mechanical properties. Finally, a laboratory-scale manufacture framework was constructed in OSU facility, including vacuum induction skull melting (ISM), gravity tilt-pour casting, and permanent metallic mold casting. This new framework was used to manufacture a prototype casting connecting rod with the new Ti-Al-Fe casting alloy served as conceptual validation for further industrialization. A preliminary cost analysis was also presented in this work to illustrate its commercialization potent compared with the current industry applications (e.g. alloy and process).