Experimental Investigations of Deformation Pathways in Nanowires PDF Download
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Author: Andreas Sedlmayr
Publisher:
ISBN:
Category : Nanowires
Languages : en
Pages : 0
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Book Description
Author: Andreas Sedlmayr
Publisher:
ISBN:
Category : Nanowires
Languages : en
Pages : 0
Get Book Here
Book Description
Author: Andreas Sedlmayr
Publisher: KIT Scientific Publishing
ISBN: 3866449054
Category : Technology & Engineering
Languages : en
Pages : 222
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Book Description
This work deals with the experimental investigation of the mechanical properties of nanowires. Experiments are conducted in a dedicated system inside the electron microscope. The mechanical response of various material systems is probed, the underlying deformation mechanisms are elucidated and subsequently put into context with mechanical size effects.
Author: Straub, Thomas
Publisher: KIT Scientific Publishing
ISBN: 3731504715
Category : Technology (General)
Languages : en
Pages : 234
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Book Description
This book investigates the fatigue mechanisms and crack initiation of Ni, Al and Cu on a small-scale in the Very High Cycle Fatigue regime by means of innovative fatigue experimentation. A novel custom-built resonant fatigue setup showed that the sample resonant frequency changes with increasing cycle number due to fatigue damage. Mechanisms such as slip band formation have been observed. Cyclic hardening, vacancy and oxidation formation may be considered as early fatigue mechanisms.
Author: Kumar, Amritesh
Publisher: KIT Scientific Publishing
ISBN: 3731506947
Category :
Languages : en
Pages : 160
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Book Description
Author: Jochen Andreas Lohmiller
Publisher: KIT Scientific Publishing
ISBN: 3866449623
Category : Technology & Engineering
Languages : en
Pages : 250
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Book Description
In this work, different nanocrystalline metals and alloys were investigated by a synchrotron-based in situ XRD mechanical testing technique in order to investigate the dominant deformation mechanisms. All tested samples show a succession and coexistence of several mechanisms, regardless of grain size, loading condition, or sample geometry. However, the relative shares of the individual mechanisms strongly vary and depend on parameters such as grain size, sample purity, and alloy composition.
Author: Zhiming Chen
Publisher: KIT Scientific Publishing
ISBN: 3866449682
Category : Technology & Engineering
Languages : en
Pages : 174
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Book Description
The 1/2111 screw dislocations in bcc iron are studied by atomistic simulations. An analytical yield criterion captures correctly the non-Schmid plastic behavior. A model Peierls potential develops a link between the atomistic modeling at 0 K and the thermally activated dislocation motion. All predicted features agree well with experimental observations. This work establishes a consistent bottom-up model that provides an insight into the microscopic origins of the plastic behavior of bcc iron.
Author: Matthias Friedrich Funk
Publisher: KIT Scientific Publishing
ISBN: 3866449186
Category : Technology & Engineering
Languages : en
Pages : 218
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Book Description
Nanostructured metals with maximal grain or twin sizes of less than 100 nm have advanced properties like increased strength.As beneficial as these microstructures can be for the strength of materials, they are not infinitely stable. During mechanical loading these metals tend to coarsen and lose their beneficial structure. Besides electron microscopic analysis of fatigued samples, in situ cycling tests were conducted in order to observe structural degradation during mechanical loading.
Author: Schwark, Tabea Gisela
Publisher: KIT Scientific Publishing
ISBN: 3731507595
Category : Grinding and polishing
Languages : en
Pages : 178
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Book Description
Soft Magnetic Composites (SMCs) typically consist of large iron particles coated with a fairly thin inorganic layer. The combination of soft particles with a brittle layer causes, however, a rather poor mechanical behaviour of the SMCs. The particle boundaries of the specific SMC Somaloy 700 3P can be classified into four different types according to the complexity of their layers. Tests on both micro- and macroscale showed that the particle-boundary interface is critical in terms of failure.
Author: Syha, Melanie
Publisher: KIT Scientific Publishing
ISBN: 3731502429
Category : Science
Languages : en
Pages : 178
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Book Description
Understanding the physical processes during fabrication and annealing of ceramic materials is a long sought goal among material scientists. Using strontium titanate as a model system for perovskite ceramics, the present work combines advanced non-destructive 3D characterization techniques and computational modeling of microstructure evolution in order to link grain morphology, interface anisotropy and microstructure evolution to macroscopic physical properties .
Author: Feuchter, Manuel Klaus Ludwig
Publisher: KIT Scientific Publishing
ISBN: 3731502615
Category : Technology & Engineering
Languages : en
Pages : 258
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Book Description
This work furthers the overall understanding of a 3w-measurement, by considering previously unexamined macroscopic influence factors within measurement by Finite Element simulations (FES). Moreover, new measuring configurations are developed to determine (an)isotropic thermal conductivities of nanoscale samples. Since no analytic solutions are available for these configurations, a new evaluation methodology is presented to determine emergent thermal conductivities by FES and Neural Networks.
