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Faculty Advisors
Tewari, Surendra
Description
Turbine blades are a critical component in high powered gas turbine engines. These components are directionally solidified to have a single grain orientation, which allows them to operate under high temperature and stress conditions. Spurious grain formation is a major concern when forming these turbine blades. The purpose of this study was to study the effect convection has on forming these defects within turbine blades. Two alloys, Pb-5.8%Sb (solutally unstable) and Al-19%Cu (solutally stable) were directionally solidified upward in a positive thermal gradient (thermally stable) in a graphite crucible having abrupt cross-sectional area change from 3.2 mm diameter to 9 mm diameter. In the Lead alloy after the cross-section-expansion there is no observable new grain formation. However, in the Aluminum alloy there is extensive new grain formation after the expansion.
Publication Date
2017
College
Washkewicz College of Engineering
Department
Chem & Biom Eng
Disciplines
Chemical Engineering
Recommended Citation
Weber, Noah and Ghods, Masoud, "Spurious grain formation due to convection at cross-section-changes during directional solidification" (2017). Undergraduate Research Posters 2017. 56.
https://engagedscholarship.csuohio.edu/u_poster_2017/56
