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Materials and techniques for model constructionThe problems confronting the designer of models for cryogenic wind tunnel models are discussed with particular reference to the difficulties in obtaining appropriate data on the mechanical and physical properties of candidate materials and their fabrication technologies. The relationship between strength and toughness of alloys is discussed in the context of maximizing both and avoiding the problem of dimensional and microstructural instability. All major classes of materials used in model construction are considered in some detail and in the Appendix selected numerical data is given for the most relevant materials. The stepped-specimen program to investigate stress-induced dimensional changes in alloys is discussed in detail together with interpretation of the initial results. The methods used to bond model components are considered with particular reference to the selection of filler alloys and temperature cycles to avoid microstructural degradation and loss of mechanical properties.
Document ID
19860010947
Document Type
Conference Paper
Authors
Wigley, D. A. (Applied Cryogenics and Materials Consultants New Castle, DE, United States)
Date Acquired
August 12, 2013
Publication Date
July 1, 1985
Publication Information
Publication: AGARD Special Course on Cryogenic Technology for Wind Tunnel Testing
Subject Category
METALLIC MATERIALS
Distribution Limits
Public
Copyright
Other
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