Paul A. Shade
Ohio State University
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Publication
Featured researches published by Paul A. Shade.
Review of Scientific Instruments | 2015
Paul A. Shade; Basil Blank; Jay C. Schuren; Todd J. Turner; Peter Kenesei; Kurt Goetze; Robert M. Suter; Joel V. Bernier; S. F. Li; Jonathan Lind; Ulrich Lienert; Jonathan Almer
High energy x-ray characterization methods hold great potential for gaining insight into the behavior of materials and providing comparison datasets for the validation and development of mesoscale modeling tools. A suite of techniques have been developed by the x-ray community for characterizing the 3D structure and micromechanical state of polycrystalline materials; however, combining these techniques with in situ mechanical testing under well characterized and controlled boundary conditions has been challenging due to experimental design requirements, which demand new high-precision hardware as well as access to high-energy x-ray beamlines. We describe the design and performance of a load frame insert with a rotational and axial motion system that has been developed to meet these requirements. An example dataset from a deforming titanium alloy demonstrates the new capability.
Integrating Materials and Manufacturing Innovation | 2013
Paul A. Shade; Michael A. Groeber; Jay C. Schuren; Michael D. Uchic
This article describes a new approach to characterize the deformation response of polycrystalline metals using a combination of novel micro-scale experimental methodologies. An in-situ scanning electron microscope (SEM)-based tension testing system was used to deform micro-scale polycrystalline samples to modest and moderate plastic strains. These tests included measurement of the local displacement field with nm-scale resolution at the sample surface. After testing, focused ion beam serial sectioning experiments that incorporated electron backscatter diffraction mapping were performed to characterize both the internal 3D grain structure and local lattice rotations that developed within the deformed micro-scale test samples. This combination of experiments enables the local surface displacements and internal lattice rotations to be directly correlated with the underlying 3D polycrystalline microstructure, and such information can be used to validate and guide further development of modeling and simulation methods that predict the local plastic deformation response of polycrystalline ensembles.
Review of Scientific Instruments | 2012
Paul A. Shade; Sang-Lan Kim; Robert Wheeler; Michael D. Uchic
A new methodology to parallelize the production of micromechanical test samples from bulk materials is reported. This methodology has been developed to produce samples with typical gage dimensions on the order of 20-200 μm, and also to minimize the reliance on conventional focused ion beam fabrication methods. The fabrication technique uses standard microelectronic process methods such as photolithography and deep-reactive ion etching to create high aspect ratio patterned templates-stencil masks-from a silicon wafer. In the present work, the stencil mask pattern consists of a linear row of tensile samples, where one grip of each sample is integrally attached to the bulk substrate. Once fabricated, the stencil mask is placed on top of a pre-thinned substrate, and the pattern and substrate are co-sputtered using a broad ion beam milling system, which ultimately results in the transfer of the mask pattern into the substrate. The methodology is demonstrated using a Si stencil mask and a polycrystalline Ni foil to manufacture an array of metallic micro-tensile samples.
Annual Review of Materials Research | 2009
Michael D. Uchic; Paul A. Shade; Dennis M. Dimiduk
Acta Materialia | 2009
Paul A. Shade; R. Wheeler; Y.S. Choi; Michael D. Uchic; Dennis M. Dimiduk; H.L. Fraser
Scripta Materialia | 2006
Michael D. Uchic; Dennis M. Dimiduk; Robert Wheeler; Paul A. Shade; H.L. Fraser
JOM | 2009
Michael D. Uchic; Paul A. Shade; Dennis M. Dimiduk
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2012
Paul A. Shade; Michael D. Uchic; Dennis M. Dimiduk; G.B. Viswanathan; R. Wheeler; H.L. Fraser
JOM | 2012
R. Wheeler; Paul A. Shade; Michael D. Uchic
Archive | 2009
Robert Wheeler; Paul A. Shade; Michael D. Uchic