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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

The orientation dependence of dislocation structure in stoichiometric NiAl single crystals deformed in high temperature creep

Bevk, Joz̆e. January 1970 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. Includes bibliographical references.
22

Diffusion and high temperature oxidation of nickel-aluminum based composite coatings /

Susan, Donald F., January 1999 (has links)
Thesis (Ph. D.)--Lehigh University, 2000. / Includes vita. Includes bibliographical references (leaves 139-148).
23

The Mechanical Properties of Precipitation Hardened Nickel Aluminum Alloys

Cornwell, Leonard Roy 07 1900 (has links)
<p> The macroscopic mechanical behaviour of alloys is intimately related to their structure at the atomic level. The influence of small (<0.1μ) ordered coherent particles (𝛄') on the mechanical properties of Ni-Al alloys has been studied. The maximum strength of polycrystals occurs at 0.45 volume fraction 𝛄' and grain boundary embrittlement occurs at higher volume fractions. It was shown that long range order in the particles affects strength by increasing the anti-phase boundary energy. In monocrystals the deformation behaviour is strongly influenced by the amount of particles present. </p> <p> By growing very large particles of 𝛄' (~1.0μ) dislocation-particle interactions have been studied. Stacking faults have been observed in the particles whose bounding dislocation Burgers vectors were determined. By suitable heat treatment still larger 𝛄' particles (~10µ) were formed which had incoherent interfaces. The dislocation networks at the interfaces were analysed. </p> / Thesis / Doctor of Philosophy (PhD)
24

Effects of pressure on flow and fracture on nickel-aluminum

Margevicius, Robert William January 1992 (has links)
No description available.
25

An investigation of deformation behaviour and creep properties of micron sized Ni3Al columns

Afrin, Nasima. January 2006 (has links)
published_or_final_version / abstract / Mechanical Engineering / Master / Master of Philosophy
26

Reactive thermomechanical processing of aluminide intermetallics /

Wall, James J. January 2003 (has links)
Thesis (M.S.)--University of Missouri-Columbia, 2003. / Typescript. Includes bibliographical references (leaves 86-89). Also available on the Internet.
27

Reactive thermomechanical processing of aluminide intermetallics

Wall, James J. January 2003 (has links)
Thesis (M.S.)--University of Missouri-Columbia, 2003. / Typescript. Includes bibliographical references (leaves 86-89). Also available on the Internet.
28

Environmentally enhanced crack growth in nickel-based superalloys /

Huang, Zhifan, January 2002 (has links)
Thesis (Ph. D.)--Lehigh University, 2003. / Includes vita. Includes bibliographical references (leaves 198-205).
29

Nickel-alumina composites and graded materials by electrophoretic deposition /

Nandakumar, Nagarajan. Nicholson, P.S. January 2005 (has links)
Thesis (Ph.D.)--McMaster University, 2005. / Supervisor: Patrick S. Nicholson. Includes bibliographical references (leaves 162-181). Also available online.
30

Planar fault energies and dislocation core spreadings in B2 NiAl

Vailhé, Christophe N. P. 17 December 2008 (has links)
The lack of ductility of the B2 NiAl alloy stands in the way of promising applications. In an effort to understand the dislocation behavior, computer simulation of the planar faults involved in the core spreadings of <100> and <111> dislocations was carried out. Seven γ-surfaces were computed for different crystallographic planes ({110}, {112}, {123}, {210}, {100}, {111} and {122}). Stable APB's are observed in the {110} and {112} planes but they are deviated from the exact 1/2a<111> position. No other stable planar fault was observed. The dislocation core spreadings are explained by the energy balance among the directions of lowest restoring forces observed in the γ-surfaces. The complete <111> screw dislocation was stable in the simulation. According to the stable APB's, two dissociation reactions of the <111> screw dislocation in the {110} and {112} planes are proposed. The simulation of metastable superpartials shows that the dissociation in the {112} planes is very close to a stable dissociation. / Master of Science

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