1–20 of 24 hits
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    Nb-base FS-85 alloy as a candidate structural material for space reactor applications: Effects of thermal aging

    Leonhard, Keith J. / Busby, Jeremy T. / Hoelzer, David T. et al. | Tema Archive | 2009
    alloys as structural materials. Throughout the history of these programs, a leading candidate has been Nb-1Zr, due to its good fabrication and ...
    Keywords: Strukturwerkstoff

    Metallurgical and physical factors in improving the corrosion resistance of thermally sprayed semi-amorphous Al-Co-Ce coatings

    Tailleart, N. / Gauthier, B. / Eidelman, S. et al. | Tema Archive | 2009
    (e.g., a localized corrosion barrier, a sacrificial anode to supply cathodic protection of any exposed AA 2024-T351, and active inhibitor ...

    A microstructure-based time-dependent crack growth model for life and reliability prediction of turbopropulsion systems

    Chan, Kwai S. / Enright, Michael P. / Moody, Jonathan et al. | Tema Archive | 2014
    in advanced turbopropulsion systems. A set of generic microstructure-based time-dependent crack growth (TDCG) models was developed and used ...
    Keywords: material variability

    Residual stresses in a quenched superalloy turbine disc: Measurements and modeling

    Rist, M.A. / Tin, S. / Roder, B.A. et al. | Tema Archive | 2006
    of the forging, and three-dimensional strain and stress components have been derived for the first time in such a large superalloy specimen ...

    Economical and environmental factors in light alloys automotive applications

    Caceres, Carlos H. | Tema Archive | 2007
    The effects of mass reduction through substitution of ferrous components by equivalent Al or Mg alloy components on the vehicle's cost and ...

    Thermo-Optical Property Degradation of ITO-Coated Aluminized Polyimide Thin Films Under VUV and Low-Energy Proton Radiation

    Free access
    Dembska, Marta / Renger, Thomas / Sznajder, Maciej | German Aerospace Center (DLR) | 2020
    . Changes in solar absorption and thermal emission coefficients caused by the irradiation were analyzed. We report a significant increase in solar ...

    Effects of strain rate and test temperature on torsional deformation behavior of API X70 and X80 linepipe steels

    Kim, Yongjin / Sang Yong Shin / Yang Gon Kim et al. | Tema Archive | 2010
    these steels having different grain sizes and volume fractions of acicular ferrite and polygonal ferrite, using a torsional Kolsky bar, and then ...

    Effective grain size and charpy impact properties of high-toughness X70 pipeline steels

    Hwang, Byoungchul / Kim, Yang Gon / Lee, Sunghak et al. | Tema Archive | 2005
    The correlation of microstructure and Charpy V-notch (CVN) impact properties of a high-toughness API X70 pipeline steel was investigated in ...

    Analysis and Evaluation of Novel Al-Mg-Sc-Zr Aerospace Alloy Strip Produced Using the Horizontal Single Belt Casting (HSBC) Process

    Ge, Sa / Celikin, Mert / Isac, Mihaiela et al. | Tema Archive | 2015
    show exceptional potential as a structural material for transportation/aerospace applications. To demonstrate the suitability of the HSBC ...
    Keywords: Konstruktionswerkstoff

    Effects of Mo, Cr, and V additions on tensile and charpy impact properties of API X80 pipeline steels

    Seung Youb Han / Sang Yong Shin / Seo, Chang-Hyo et al. | Tema Archive | 2009
    moted the formation of coarse GB and hard secondary phases, thereby leading to an increased effective grain size, ETT, and strength, and a ...

    Ferrite and spheroidized cementite ultrafine microstructure formation in an Fe-0.67 Pct C steel for railway wheels under simulated service conditions

    Handa, Kazuyuki / Kimura, Yoshisato / Mishima, Yoshinao | Tema Archive | 2009
    electron backscattered diffraction. An ultrafine microstructure consisting of ferrite grains with a size of less than 1 micron and spheroidized ...

    Effects of Annealing Temperature on the Electrochemical Hydrogen Storage Behaviors of La-Mg-Ni-Based A2B7-Type Electrode Alloys

    Zhang, Yanghuan / Yuan, Zeming / Zhai, Tingting et al. | Tema Archive | 2015
    structure and LaNiwith a CaCu5-type hexagonal structure; and one residual phase, LaNi3. Both the lattice ...

    Observation and modeling of stress corrosion cracking in high pressure gas pipe steel

    Choi, Byoung-Ho / Chudnovsky, Alexander | Tema Archive | 2011
    crack growth (ICG) driven by a combination of mechanical stresses and electrochemical processes constitutes the second stage. At the end of the ...

    Early stage precipitation kinetics in an Al-Zn-Mg and an Al-Zn-Mg-Ti alloy

    Brofman, P. J. / Judd, G. | NTRS | 1978
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Metallic Materials

    The influence of cobalt on the tensile and stress-rupture properties of the nickel-base superalloy MAR-M247

    Nathal, M. V. / Maier, R. D. / Ebert, L. J. | NTRS | 1982
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Metallic Materials

    A comparison of shear localization susceptibility in U-0.75 wt pct Ti and W-Ni-Fe during high strain rate deformation

    Zurek, A.K. / Follansbee, P.S. | Tema Archive | 1995
    A comparison of shear instability in U-Ti versus W alloy during high strain rate deformation is presented. A simple instability analysis ...

    Viscoelastic spectra of Cd(0.67)Mg(0.33) in torsion and bending

    Steven Cook, L. / Lakes, R.S. | Tema Archive | 1995
    combination of stiffness and loss in a monolithic material. ...

    Maintaining an elongated grain structure after deformation of mechanically alloyed NiCrAlY

    Trela, D. M. / Glasgow, T. K. / Ebert, L. J. | NTRS | 1976
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Metallic Materials

    Creep behavior of Ti-25Al-10Nb-3V-1Mo

    Cho, W. / Thompson, A.W. / Williams, J.C. | Tema Archive | 1990
    stress and temperature between 650C and 870C. A pronounced influence of microstructure on creep resistance was found. Generally, the beta ...
    Keywords: KRIECHEN (WERKSTOFF)

    Mixed gravity mode growth during directional dendritic solidification aboard the KC-135

    Grugel, R.N. | Tema Archive | 1989
    processed in microgravity and unit-g environments. To utilize NASA's KC-135 aircraft, which flies a cyclic parabolic route designed to provide ...