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Article
Search for NDE Methods to Characterize Thermal History and Mechanical Properties of Al-Li Alloys
Review of Progress in Quantitative Nondestructive Evaluation
  • D. J. Bracci, Iowa State University
  • P. Garikepati, Iowa State University
  • David C. Jiles, Iowa State University
  • Otto Buck, Iowa State University
Location
Williamsburg, VA
Start Date
1-1-1988 12:00 AM
Description

Aluminum-lithium alloys have attracted the interest of the aerospace industry for some time now since the use of such alloys would reduce the weight of an airframe by roughly ten percent. The production of these alloys, however, requires precise thermal and/or thermomechanical treatments to insure required material properties, such as the yield strength and ductility. On-line monitoring of the state of the material thus seems to be desirable for quality control of these materials. This paper presents results of an investigation of fieldable NDE methods capable of providing information on the state of the material. Eddy current measurements were found to be particularly sensitive to Li in solid solution. Furthermore, it appears that hardness measurements are sensitive to the volume fractions, and probably the morphology, of the various precipitates formed. The results obtained so far (see also [1]) as well as by other authors on different aluminum alloys [2–4], this work will continue with additional results to be reported in future publications.

Book Title
Review of Progress in Quantitative Nondestructive Evaluation
Chapter
Chapter 7: Characterization of Materials
Section
Properties
Pages
1255-1262
DOI
10.1007/978-1-4613-0979-6_45
Language
en
File Format
application/pdf
Citation Information
D. J. Bracci, P. Garikepati, David C. Jiles and Otto Buck. "Search for NDE Methods to Characterize Thermal History and Mechanical Properties of Al-Li Alloys" Vol. 7B (1988)
Available at: http://works.bepress.com/david_jiles/44/