Computational Design of Ageless Structural Materials

Metadata Updated: May 2, 2019

The focus of this project is to link microstructure, mechanical performance, and processing of additively manufactured titanium alloys.[HTML_REMOVED] Ultimately, linking such material attributes would permit alloy design (e.g., mechanical performance) by prescribing alloy composition and processing parameters. Historically, the structural optimization of aerospace components has been done through geometric methods.[HTML_REMOVED] A monolithic material is chosen based on the best compromise between the competing design limiting criteria.[HTML_REMOVED] Then the structure is geometrically optimized to give the best overall performance using the single material chosen.[HTML_REMOVED] Functionally graded materials offer the potential to further improve structural efficiency by allowing the material composition and/or microstructural features to spatially vary within a single structure.[HTML_REMOVED] Thus, local properties could be tailored to the local design limiting criteria.[HTML_REMOVED] Additive manufacturing techniques enable the fabrication of such graded materials and structures.[HTML_REMOVED] This paper presents the results of a graded material study using two titanium alloys processed using electron beam freeform fabrication, an additive manufacturing system.[HTML_REMOVED] The results show that the two alloys uniformly mix at various ratios and the resultant static properties of the mixed alloys behave according to rule-of-mixtures.[HTML_REMOVED] Additionally, the crack growth behavior across an abrupt change from one alloy to the other shows no discontinuity and the crack smoothly transitions from one crack growth regime into another.[HTML_REMOVED] [HTML_REMOVED]

Access & Use Information

Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_12032
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Datagov Dedupe Retained 20190501230127
Harvest Object Id fe45ab56-2389-46d7-b15f-028f88d17458
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2015-10-01
Homepage URL
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash b9ed0a36afb9bb5f157341c86ea120682abfa38b
Source Schema Version 1.1

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