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Download or read book Mechanical Properties and Constitutive Relations for Tantalum and Tantalum Alloys Under High-rate Deformation written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : G. Abowitz
Publisher :
ISBN 13 :
Total Pages : 134 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Mechanical Properties of Tantalum with Special Reference to the Ductile-brittle Transition written by G. Abowitz and published by . This book was released on 1963 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: The tensile behavior of dilute Ta-H and Ta-Mo alloys was studied as a function of alloying addition, grain size and test temperature at a constant strain rate. The results are interpreted in terms of the parameters sigma sub-i and k sub-y of the Petch equation. For Ta-H alloys at 25 C sigma sub-i was independent of hydrogen content whereas k sub-y increased with hydrogen content. Deformation twinning was not observed in Ta-H alloys either at 25 C or at -196 C. Dilute additions of Mo to Ta at 25 C resulted in an increase in k sub-y whereas sigma sub-i was unaffected. Twinning was observed at -196 C but not at 25 C.A large increase in ductility accompanied twinning.
Author : E. Chen
Publisher : Minerals, Metals, & Materials Society
ISBN 13 :
Total Pages : 370 pages
Book Rating : 4.0/5 ( download)
Download or read book Tantalum written by E. Chen and published by Minerals, Metals, & Materials Society. This book was released on 1996 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 37 papers included in this proceedings volume present the state-of-the-art technology of tantalum and tantalum alloys, with an emphasis on the areas of mining, extraction, and refining; fabrication and processing; high strain rate deformation; microstructure, properties, and modeling; applications; and applications and new concepts. It is a valuable reference for scientists and engineers working in this field.
Author : F. F. Schmidt
Publisher :
ISBN 13 :
Total Pages : 344 pages
Book Rating : 4.3/5 (91 download)
Download or read book Tantalum and Tantalum Alloys written by F. F. Schmidt and published by . This book was released on 1960 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (685 download)
Download or read book The Influence of Tungsten Alloying on the Mechanical Properties of Tantalum written by and published by . This book was released on 1994 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: In mechanical tests of tantalum-tungsten alloys with nominal tungsten contents between 0 and 10 wt % for strain rates between 0.000016 and 6800sā1 and temperatures between 77 and 400 K, the addition of tungsten noticeably reduces the strain-rate dependence of the flow stress of tantalum near yield. It also subtly alters the strain-rate behavior of the work hardening, making it more like that of copper, an fcc metal. These effects are reflected in the limiting strains for uniform plastic deformation calculated from our flow curves. For unalloyed tantalum, the instability strain appears to drop dramatically for strain rates in excess of approximately 0.005sā1, whereas for tungsten bearing alloys, it remains unchanged or increases slightly. Tungsten alloys may therefore be preferable to unalloyed tantalum in applications that demand substantial ductility at high rates of strain. We briefly discuss possible mechanisms for plastic flow in tantalum and how they might be affected by tungsten additions to produce the effects we observe.
Author : F. F. Schmidt
Publisher :
ISBN 13 :
Total Pages : 134 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Engineering Properties of Tantalum and Tantalum Alloys written by F. F. Schmidt and published by . This book was released on 1963 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of a state-of-the-art survey covering tantalum and seven of its alloys. All data are given in tabular and graphical form covering some of the more important physical, mechanical, and metallurgical properties for each material. References are given at the conclusion of each material section.
Author :
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (685 download)
Download or read book Influence of Tungsten Alloying Additions on the Mechanical Properties and Texture of Tantalum written by and published by . This book was released on 1993 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tantalum, like all bcc metals exhibits deformation behavior substantially influenced by alloying, temperature, and strain rate. Recently, the mechanical response, in particular the high-strain-rate response, of tantalum and tantalum alloys has received increased interest for ballistic applications. In this paper recent results on the influence of tungsten alloying additions on the mechanical response and starting crystallographic texture of tantalum-tungsten alloys are presented. The stress-strain behavior of three tantalum alloys containing 2.5, 5, and 10 wt. % W has been investigated as a function of loading path, tension and compression, and strain rate, 10ā3 to 8000 sā1. The yield strength and work-hardening rate were found to increase with increasing tungsten alloying content compared to unalloyed Ta. Based on measurements of the surface and centerline textures of the Ta-W alloys, no systematic effect of tungsten content on texture was documented. However, due to variations in mechanical behavior between through-thickness and in-plane properties, a need for complete through-thickness texture measurements is indicated.
Author : Barry L. Mordike
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.3/5 (91 download)
Download or read book Mechanical Properties of Tantalum and Niobium Base Alloys written by Barry L. Mordike and published by . This book was released on 1970 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The critical resolved shear stress of tantalum base alloys was measured from -196C to 300C and of niobium base alloys from -196C to 1800C. The behavior at low temperatures is complex. Certain features can, however, be recognized as significant: Both indirect and direct interactions contribute to the critical resolved shear stress. At high temperatures solid solution hardening is associated with an elastic interaction between solute atoms and dislocations. The modulus misfit parameter is more important than the size misfit parameter in describing the hardening.
Author : Yuejian Chen
Publisher :
ISBN 13 :
Total Pages : 480 pages
Book Rating : 4.:/5 (318 download)
Download or read book High-strain, High-strain-rate Deformation of Tantalum written by Yuejian Chen and published by . This book was released on 1998 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : S. Nemat-Nasser
Publisher : Cambridge University Press
ISBN 13 : 9780521839792
Total Pages : 858 pages
Book Rating : 4.8/5 (397 download)
Download or read book Plasticity written by S. Nemat-Nasser and published by Cambridge University Press. This book was released on 2004-11-29 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher Description
Author : H. R. Ogden
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.3/5 (91 download)
Download or read book Physical and Mechanical Properties of Tantalum written by H. R. Ogden and published by . This book was released on 1959 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Tomasz Lodygowski
Publisher : Springer Science & Business Media
ISBN 13 : 3709117682
Total Pages : 290 pages
Book Rating : 4.7/5 (91 download)
Download or read book Constitutive Relations under Impact Loadings written by Tomasz Lodygowski and published by Springer Science & Business Media. This book was released on 2013-12-19 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes behavior of materials (ductile, brittle and composites) under impact loadings and high strain rates. The three aspects: experimental, theoretical and numerical are in the focus of interest. Hopkinson bars are mainly used as experimental devices to describe dynamic behavior of materials. The precise description of experimental techniques and interpretation of wave interaction are carefully discussed. Theoretical background refers to rate dependent thermo viscoplastic formulation. This includes the discussion of well posedness of initial boundary value problems and the solution of the system of governing equations using numerical methods. Explicit time integration is used in computations to solve dynamic problems. In addition, many applications in aeronautic and automotive industries are exposed.
Author : Cristian Teodosiu
Publisher : Springer
ISBN 13 : 370912672X
Total Pages : 300 pages
Book Rating : 4.7/5 (91 download)
Download or read book Large Plastic Deformation of Crystalline Aggregates written by Cristian Teodosiu and published by Springer. This book was released on 2014-05-04 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book gives a comprehensive view of the present ability to take into account the microstructure and texture evolution in building up engineering models of the plastic behaviour of polycrystalline materials at large strains. It is designed for postgraduate students, research engineers and academics that are interested in using advanced models of the mechanical behaviour of polycrystalline materials.
Author : M. A. Adams
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (436 download)
Download or read book The Mechanical Properties of Tantalum with Special Reference to the Ductile-brittle Transition written by M. A. Adams and published by . This book was released on 1961 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tensile tests were made on specimens of commercial Ta of different grain-sizes, and the variation of lower yield stress with grain-size 2d was used to assess the effect of temperature (23, -78 and -196 deg C) and strain-rate (0.0019 and 0.0996 sec. at each temperature) on the parameters sigma sub i and k sub y in a Petch type equation. The results indicate that the sensitivity of the yield strength to temperature and strain-rate arises almost entirely from the effects that these variables produce on sigma sub i. The high resistance of Ta to brittleness has been confirmed, all of the specimens showing pronounced necking and predominantly fibrous fractures; on the fracture surfaces of the coarser grained specimens tested at -196 deg C (both strain rates) some cleavage facets were observed. The greater ductility of Ta relative to Nb, Mo, and mild steel is attributed to a low value of k sub y and a high value of shear modulus.
Author : Keith D. Sheffler
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (317 download)
Download or read book Mechanical Behavior of Tantalum-base T-111 Alloy at Elevated Temperature written by Keith D. Sheffler and published by . This book was released on 1969 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report investigates the mechanical behavior of tantalum T-111 alloy at high temperatures and ultrahigh vacuum.
Author :
Publisher :
ISBN 13 :
Total Pages : 834 pages
Book Rating : 4.X/5 (4 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1964 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert H. Titran
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (31 download)
Download or read book Long Time Creep Behavior of Tantalum - 10 Tungsten in High Vacuum written by Robert H. Titran and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
