Download or read book Elevated Temperature Deformation and Electron Microscope Studies of Polycrystalline Tungsten and Tungsten Rhenium Alloys written by and published by . This book was released on 1968 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tungsten, tungsten-25 wt. % rhenium and tungsten-30 wt. % rhenium were plastically deformed from 1400 to 1900C at stresses up to 10,000 psi in a vacuum of less than 10 sub to 8 torr. The activation energy for creep and the relationship between stress and strain rate were determined. Effects of thermo-mechanical history, composition, and grain size on strain rate were also investigated. Dislocation substructure was studied by etch pit and transmission electron microscope techniques, and these observations were correlated with the creep data. The factors important in the high-temperature deformation of these materials were analyzed, and the experimental results were rationalized in terms of current theories for rate- controlling deformation mechanisms.

Download or read book Dislocation Structures in Slightly Strained Tungsten and Tungsten rhenium and Tungsten tantalum Alloys written by Joseph R. Stephens and published by . This book was released on 1967 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Superplasticity in Tungsten rhenium Alloys written by M. Garfinkle and published by . This book was released on 1968 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1988 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976-05 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solid Solution Softening rhenium Ductilizing Effect and Bubble Strengthening in Tungsten rhenium Alloys written by Ronald Paul Simpson and published by . This book was released on 1973 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reactor Materials written by and published by . This book was released on 1969 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reactor Core Materials written by and published by . This book was released on 1968 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Temperature Materials written by F. Benesovsky and published by . This book was released on 1969 with total page 1118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Dropout Pattern written by and published by . This book was released on 1969 with total page 1108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Yielding and Fracture in Tungsten and Tungsten rhenium Alloys written by Peter L. Raffo and published by . This book was released on 1968 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Temperature Materials written by Friedrich Benesovsky and published by . This book was released on 1969 with total page 1150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solid Solution Softening Rhenium Ductilizing Effect and Bubble Strengthening in Tungsten Rhenium Alloys written by Ronald P. Simpson and published by . This book was released on 1973 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of carbon additions to tungsten and tungsten-rhenium alloys was determined by anelastic relaxation, stress relaxation and mechanical property studies. Rhenium alone, rather than a combination of rhenium and interstitials, lowers the lattice friction stress (Peierls stress) and is responsible for the ductilizing effect in tungsten. Bubbles were identified at grain boundaries of recrystallized, doped tungsten and tungsten-rhenium alloys from scanning electron microscopy studies of intergranular fracture surfaces. Auger electron spectroscopy demonstrated that these bubbles are coated with potassium which is highly localized at grain boundaries. Varying concentrations of rhenium had no noticeable effect on fracture behavior, bubble size or distribution, or potassium segregation. The bubbles dramatically raise recrystallization temperature and control grain growth texture and are, therefore, responsible for the high temperature creep properties of 'doped' tungsten and tungsten-rhenium alloys.

Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1961-02 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plansee Proceedings written by and published by . This book was released on 1969 with total page 1118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermochemical Deposition and Evaluation of Rhenium and Tungsten rhenium Alloys written by and published by . This book was released on 1967 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanical Properties of a Tungsten 23 4 percent rhenium 0 27 percent hafnium Carbon Alloy written by William D. Klopp and published by . This book was released on 1971 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: