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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.
1

An Integrated Approach to Determine Phenomenological Equations in Metallic Systems

Ghamarian, Iman 12 1900 (has links)
It is highly desirable to be able to make predictions of properties in metallic materials based upon the composition of the material and the microstructure. Unfortunately, the complexity of real, multi-component, multi-phase engineering alloys makes the provision of constituent-based (i.e., composition or microstructure) phenomenological equations extremely difficult. Due to these difficulties, qualitative predictions are frequently used to study the influence of microstructure or composition on the properties. Neural networks were used as a tool to get a quantitative model from a database. However, the developed model is not a phenomenological model. In this study, a new method based upon the integration of three separate modeling approaches, specifically artificial neural networks, genetic algorithms, and monte carlo was proposed. These three methods, when coupled in the manner described in this study, allows for the extraction of phenomenological equations with a concurrent analysis of uncertainty. This approach has been applied to a multi-component, multi-phase microstructure exhibiting phases with varying spatial and morphological distributions. Specifically, this approach has been applied to derive a phenomenological equation for the prediction of yield strength in a+b processed Ti-6-4. The equation is consistent with not only the current dataset but also, where available, the limited information regarding certain parameters such as intrinsic yield strength of pure hexagonal close-packed alpha titanium.
2

Determining the Mechanical Properties of Lattice Block Structures

Wilmoth, Nathan G. 05 June 2013 (has links)
No description available.
3

Microstructural Evolution of LMDp Ti-6Al-4V : Effect of Time and Temperature during Heat Treatment

Fernández Perucho, Iu-Aran January 2021 (has links)
No description available.
4

The Role of Microstructure on High Cycle Fatigue Lifetime Variability in Ti-6Al-4V

Polasik, Alison K. January 2014 (has links)
No description available.
5

A combinatorial approach to the development of composition-microstructure-property relationships in titanium alloys using directed laser deposition

Collins, Peter Chancellor 20 May 2004 (has links)
No description available.

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