Monthly Archives September 2014

Novel capability enables first test of real turbine engine conditions – Featured on Office of Science Homepage

The Office of Science , Department of Energy has featured our work on their homepage.

DOE

The article highlights our work:

“This goes beyond any other in-situ capabilities to allow the influence of temperature, stress and thermal gradients to be studied together. This enables for the first time scientists to view the microstructure and internal strain in both the substrate and thermal barrier coating system during real operating conditions and in real time.”

Read more of the article on the ANL webpage

 

Students Mentored through LEARN program

Through the Learning Environment and Academic Research Network (LEARN) program, Imad is mentoring two first year students. The two students, Steven and Luke, are working on a research project regarding the photoluminescent characterization of a hybrid carbon fiber composite, as well as developing graphical user interfaces for non-linear least squared software analysis

Multiscale mechanics to determine nanocomposite elastic properties with piezospectroscopy


actamatimage

Read our paper in Acta Materialia

Abstract:
The piezospectroscopic (PS) properties of chromium-doped alumina allow for embedded inclusion mechanics to be revisited with unique experimental setups that probe the particles’ state of stress when the composite is under applied load. These experimental investigations of particle mechanics will be compared to the Eshelby theory and a derivative theory. This work discovers that simple nanoparticle load transfer theories are adequate for predicting PS properties in the low to intermediate volume fraction range (⩽20%). By applying the multiscale mechanics to a PS response, the inverse problem was demonstrated to reveal the elastic modulus of the composite. The implications for this technique are damage monitoring through observation of reduced mechanical properties in addition to a method to assist with engineering nanomaterials.