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Destabilisation and Failure of Cylindrical Nanopores : A Phase Field Study
(2017-11-28)
Phase field models have played an important role in shaping our understanding of a variety of micro structural phenomena in materials. Their attractive features include (a) their ability to capture instabilities in ...
Reactive Hot Pressing Of ZrB2-Based Ultra High Temperature Ceramic Composites
(2010-10-08)
Zirconium- and titanium- based compounds (borides, carbides and nitrides) are of importance because of their attractive properties including: high melting temperature, high-temperature strength, high hardness, high elastic ...
Tensile And Low Cycle Fatigue Behavior Of A Ni-Base Superalloy
(2009-12-14)
Background and Objective: Nickel-base superalloys, strengthened by a high volume fraction of Ni3Al precipitates, have been the undisputed choice for turbine discs in gas turbines as they exhibit the best available combination ...
Grain Boundary Processes In High Temperature Densification And Deformation Of Nanocrystalline Zirconia
(2011-02-08)
Grain boundary processes play a major role in controlling different rate processes in yttria stabilized tetragonal zirconia. The present study concentrated on rate processes in tetragonal zirconia, which were significantly ...
First Principles Study Of Structure And Stacking Fault Energies In Some Metallic Systems
(2010-08-05)
Plastic deformation in crystalline materials largely depends on the properties of dislocations, in particular their mobility. While continuum description of deformation of a crystalline metal can be made reasonably well ...
Study Of Evaluation Of Texture And Microstructure During Different Modes Of Rolling And Annealing Of Two Phase α-β Brass
(2010-09-28)
It is well known that texture and microstructure play a crucial role in determining properties of metallic materials. The evolution of microstructure and texture during deformation and annealing of copper and some copper ...
Multi-Scale Approaches For Understanding Deformation And Fracture Mechanisms In Amorphous Alloys
(2010-03-09)
Amorphous alloys possess attractive combinations of mechanical properties (high elastic limit, ~2%, high fracture toughness, 20-50 MPa.m1/2, etc.) and exhibit mechanical behavior that is different, in many ways, from that ...
Structural, Ferroelectric, Piezoelectric and Phase Transition Studies of Lead Free (Na0.5Bi0.5)TiO3 Based Ceramics
(2018-04-23)
Ferroelectric materials, especially the polycrystalline ceramics, are very promising material for a variety of applications such as high permittivity dielectrics, ferroelectric memories, piezoelectric sensors, piezoelect ...
Studies On Bulk And Multilayer Composites Of Nb-Si Alloys
(2013-08-02)
The present thesis deals with Nb-Si alloy composites in both bulk and multilayer forms.
The work has been divided into two parts. First part (chapter 4-6) deals with Nb based
silicides binary and ternary alloys with ...
An Investigation On The Effect Of Structural And Microstructural Attributes On Magnetostriction Of Tb-Dy-Fe And Fe-Ga Alloys
(2016-04-26)
Giant magnetostrictive RFe2 type (R represents rare earths) intermetallics form an important class of magnetic materials keeping in view of their potential applications as sensors and/ or actuators. In this thesis, one ...