M Tschopp - Storming Media

Measurement of gamma prime Precipitates in a Nickel-Based Superalloy using Energy-Filtered Transmission Electron Microscopy Coupled With Automated Segmenting Techniques (Preprint)

Jan 2010

16 pages

Authors: J S Tiley; G B Viswanathan; A Shiveley; M Tschopp; R Srinivasan; H L Fraser; R Banerjee; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH METALS BRANCH

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Precipitates of the ordered L1(sub 2) gamma prime phase (dispersed in the face-centered cubic or FCC gamma matrix) were imaged in Rene 88 DT, a commercial multicomponent Ni-based superalloy, using energy filtered transmission electron microscopy (EFTEM). Imaging was performed using the Cr, Co, Ni, Ti and Al elemental L-edges in the energy loss spectrum. Manual and automated segmentation procedures were utilized for identification of precipitate boundaries, measurement of precipitate sizes ...

Collaborative Research and Development (CR&D). Task Order 0061: Modeling Complex Structural Geometry and Process Interaction

May 2008

80 pages

Authors: Bence B Bartha; R John; M Caton; S Jha; W J Porter; S Fairchild; T Murray; M Tschopp; K Li; J M Larsen; C J Szczepanski; M G Glavicic; P Martin; UNIVERSAL TECHNOLOGY CORP DAYTON OH

This research in support of the Air Force Research Laboratory Materials and Manufacturing Directorate was conducted at Wright-Patterson AFB, Ohio from 11 August 2006 through 30 April 2008. This task worked to help understand the effect of process variation on the behavior of complex structural components.