Iron superalloys
Dr. Sung Il Baik, *Dr. Mike Rawlings and *Dr. Nhon Q Vo

We are investigating the relationship between the processing and the creep resistance of ferritic superalloys that are strengthened by a hierarchical microstructure. This link is observed both experimentally and computationally.

Cobalt superalloys
Tony Chung, Francesca Long, Dr. Jacques Perrin Toinin, *Dr. James Coakley, *Dr. Peter Bocchini, and Dr. *Daniel Sauza

We are developing new high temperature alloys based on Cobalt. Methods such as creep and hardness tests are used to investigate the mechanical properties of these alloys and Atom Probe Tomography is utilized to study the structure.

Aluminum superalloys
Dr. Jacques Perrin Toinin, Dr. Anthony De Luca, Dr. Dinc Erdeniz, Richard Michi, and *Dr. Nhon Q Vo

We investigate microstructure and creep properties of binary and ternary Al-Sc-X, Al-Ti-X and Al-Zr-X alloys with nanoscale, coherent, coarsening-resistant precipitates. Additions of submicron alumina dispersoids are also investigated.

Micro-architectured Ni-based superalloys
Dinc Erdeniz, *Cong Wang, and Ashley PazyPuente

We are developing Ni-based superalloys with topologically-optimized micro-architectural features. We use the pack cementation technique to add Al,Ti and Mo to woven or braided structures fabricated from Ni or Ni-Cr wires and transform them into creep- and oxidation-resistant superalloys.

Freeze-casting in microgravity
Kristen Scotti

We are investigating the effects of microgravity solidification of titanium oxide foams in an effort increase the homogeneity of pore distribution and reduce both tortuosity and defect sites. It is expected that integrating foams created in microgravity as electrode material in dye sensitized solar cells will result in higher photon absorption and higher electron transport rates as a result of improved crystalinity.

Freeze-Casting of Directionally Solidified Ni-, Cu-, Co-, and W- Foams
Sandra Häberli, André Röthlisberger under Prof. Ralph Spolenak, *Hyeji Park, *Myounggeun Choi, and *Hyungyung Jo under *Dr. Heeman Choe

Freeze-cast directionally porous iron foams
Stephen Wilke

We are investigating processing methods to achieve iron foams with hierarchical pore shape and size for hydrogen storage/generation purposes

Additive manufacturing of NiMnGa and NiTi shape memory microlattices
Shannon Taylor

In collaboration with Shah lab, we are investigating the effects of the 3D-printing parameters and heat-treatment duration and temperature on the microstructure, porosity, and shape memory properties of the Ni-Mn-Ga and NiTi-Nb wires and micro-lattices.

Densification mechanisms of 3D-printed micro-trusses
Dr. Christoph Kenel

Collaborating with the Shah lab, we aim to gain insight into the densification mechanisms upon reduction and sintering of 3D-printed structures. By learning about different sources of porosity and controlling them during sintering, we will ultimately tailor the structure for different applications.

*Micro-architectured Ni-based superalloys
Dr. Dinc Erdeniz, Cong Wang, and Dr. Ashley PazyPuente

We are developing Ni-based superalloys with topologically-optimized micro-architectural features. We use the pack cementation technique to add Al,Ti and Mo to woven or braided structures fabricated from Ni or Ni-Cr wires and transform them into creep- and oxidation-resistant superalloys.

Phase Change and Strain Evolution in Li-ion Batteries
*Dr. Matt Glazer

We are examining transient phase change and strain development phenomena during the use of Li-ion batteries and the effects of structure and hierarchal architecture on these phenomena using the Advanced Photon Source at Argonne National Laboratory.

*Nanoporous Gold Foams
*Karen Yu-Chen Chen

Nanoporous gold has a sponge-like structure with extremely high surface due to the nanometer scale porosity. We use cutting-edge x-ray nano-tomography and in situ imaging to characterize the structural evolution of nanoporous gold during dealloying and coarsening.

*Iron-base Foams
*Justin Scott

We are investigating processing methods to achieve open-cell, ferritic steel foams for solid-oxide fuel cell interconnects. Mechanical properties at room temperature and typical use temperatures are being examined.

*Bulk Metallic Glass Foams
*Marie Cox

We are developing new a powder-based process to fabricate bulk metallic glasses (Zr57Nb5Al10Cu15 Ni13) with open, elongated pores. The structure and properties of these high-strength foams are studied.

NiTi-base Foams
*Dr. Catherine Tupper, *Antoine Emery, and *Anselm Neurohr

We are investigating processing methods to achieve open or close-cell NiTi foams with superelastic or shape-memory compositions. We are also characterizing the mechanical properties of these foams.

*Artistic Bronzes
Mike Rawlings and *Dr. Marcus Young

We are analyzing the composition and patinas of modern bronzes by artists such as Matisse, Brancusi and Picasso, and investigating the casting technology of bronzes from the early Western Zhou Dynasty.

*Cahokia Copper
*Dr. Alix Deymier-Black and *Matt Chastain

Copper Sheet artifacts from the Cahokia Mounds, IL are examined using metallurgical techniques to determine the forming techniques used by the Mississippians.

*Modeling of Bone Load Transfer Nanomechanics
*Dr. Fang Yuan

We are creating finite element models of bone structure at collagen fibril level to simulate their mechanical responses and compare with experimental data from synchrotron X-ray diffraction measurement. The detailed strain evolution in different phases of bone and the load transfer between them are studied.

*Load Transfer in Cortical Bone
*Dr. Anjali Singhal and *Dr. Fang Yuan

We investigate mechanical properties of bones in different loading and environmental conditions. We use the high-energy synchrotron x-ray diffraction technique to measure the strains in the component phases of bone (ceramic hydroxyapatite and organic collagen), and then correlate it to the macroscopic behavior.

*Load Transfer in Dentin
*Dr. Alix Deymier-Black and *Dr. Fang Yuan

High energy X-ray diffraction is being used to investigate load transfer behaviors between the ceramic and proteinaceous phases of dentin.

Phase Change and Strain Evolution in Li-ion Batteries
Matt Glazer

We are examining transient phase change and strain development phenomena during the use of Li-ion batteries and the effects of structure and hierarchal architecture on these phenomena using the Advanced Photon Source at Argonne National Laboratory.