2017 Technical Division Young Professional Poster Competition: Structural Materials Division (SMD)
Sponsored by: TMS Extraction and Processing Division, TMS Functional Materials Division, TMS Light Metals Division, TMS Materials Processing and Manufacturing Division, TMS Structural Materials Division
Program Organizers: TMS Administration

Monday 6:00 PM
February 27, 2017
Room: Hall B1
Location: San Diego Convention Ctr


YP-9: Body-centered Phase of Shock Loaded Single Crystal Copper: Anupam Neogi1; Nilanjan Mitra1; 1IIT Kharagpur
    We have carried out a series of multi-million atoms non-equilibrium molecular dynamics and ab-initio molecular dynamics simulations to investigate the effect of crystal orientation over the shock induced plasticity and phase transformation in single crystal copper. Crystallographic orientation of [100], [110] and [111] has been studied for various intensity of shock ranging from 1.0 km/s to 3.0 km/s. During shock wave propagation along <100> and <110>, a FCC-to-BCT phase transformation has been observed to occur behind the shock front at higher intensity of shock, e.g. above 1.5 km/s of piston velocity for Cu(100). To explore the atomistic mechanisms involved in this structural phase transformation and associated characterization, radial distribution function, adaptive common neighbor analysis and x-ray diffraction pattern has been utilized.

YP-10: Effect of Neutron Irradiation on Friction Stir Processed ODS Alloys (MA956 and MA754): Ramprashad Prabhakaran1; Yaqiao Wu2; Jatu Burns2; James Cole3; Indrajit Charit4; Rajiv Mishra5; KL Murty6; TS Byun1; 1Pacific Northwest National Laboratory; 2Boise State University; 3Idaho National Laboratory; 4University of Idaho; 5University of North Texas; 6North Carolina State University
    Efforts are ongoing to examine the feasibility of using oxide dispersion strengthened (ODS) alloys in advanced nuclear reactors. Conventional fusion welding of ODS alloys could cause various undesirable effects such as the coalescence of oxide dispersoids and generation of significant porosity. Hence, friction stir welding (FSW) was used to weld iron-based MA956 plates and nickel-based MA754 alloys separately in a bead-on-plate configuration. Higher weld efficiencies were achieved in both alloys. Microhardness and mini-tensile testing of the parent and processed materials were carried out to evaluate the mechanical properties. EBSD, TEM and APT were used to evaluate the microstructural characteristics of the parent and processed materials. Both parent and processed specimens were irradiated in the Advanced Test Reactor (ATR) for 1 and 2 dpa. The irradiated materials were characterized using microhardness testing, EBSD and TEM analyses.

YP-11: In Situ Ion Irradiation of Multilayer (TiN, TiAlN) Ceramic Coating for Accident Tolerant Zr-alloy Fuel Claddings: Jing Hu1; Douglas Wolfe2; Arthur Motta2; Meimei Li1; Mark Kirk1; 1Argonne National Laboratory; 2Pennsylvania State University
    Accident tolerant fuel claddings are being developed in order to prevent future accidents like that at Fukushima. In this study, multilayer (TiN, TiAlN) ceramic coating with different compositions deposited on a ZIRLOTM were studied in the Intermediate Voltage Electron Microscopy (IVEM). Preliminary in situ ion irradiation of samples with 1 MeV Kr ions at 300 C and up to 20 dpa on the coatings showed good irradiation resistance of the coatings with the integrity of the coatings remaining after irradiation. No irradiation defects above 1 nm observed during or following irradiation, no obvious change in existing columnar grain structure and size were observed. The ZIRLOTM substrate showed expected defect accumulation under irradiation. Detailed analysis of the ion irradiated samples with different layer architecture and composition will provide a better understanding of the irradiation performance and clearer guidance for further neutron irradiation experiment.

YP-12: Study of Magneto-optical Characteristics of Cerium Substituted Yttrium Iron Garnet Thin Films on Quartz Substrates: Mohammad Gharibshahi1; 1Satrap Pars.Co & Islamic Azad University of Ahvaz
    In the current study, yttrium iron garnet thin films substituted with cerium with the general formula of CexY3-xFe5O12 and values of (x = 0, 0.1, 0.3, 0.5, 0.7) were prepared through sol–gel method using spin coating technique and heating treatment on quartz substrates. Prepared samples were studied to check physical characteristics. X-ray diffraction analysis (XRD), scanning electron microscope (SEM), atomic force microscope (AFM), and vibrating sample magnetometer (VSM) were applied to study the impact of impurities of Ce on the structural characteristics, surface morphology of films and magnetic properties, respectively. Faraday rotation values of samples were measured at a wavelength of 632 nm. The image of atomic force microscope (AFM) of prepared samples shows that the thin films have a continuous and smooth surface.