The problem of dimensional instability in airfoil models for cryogenic wind tunnels
- Wigley, D. A.
- Sep 1, 1982.
- Physical Description:
- 1 electronic document
- Restrictions on Access:
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- The problem of dimensional instability in airfoil models for cryogenic wind tunnels is discussed in terms of the various mechanisms that can be responsible. The interrelationship between metallurgical structure and possible dimensional instability in cryogenic usage is discussed for those steel alloys of most interest for wind tunnel model construction at this time. Other basic mechanisms responsible for setting up residual stress systems are discussed, together with ways in which their magnitude may be reduced by various elevated or low temperature thermal cycles. A standard specimen configuration is proposed for use in experimental investigations into the effects of machining, heat treatment, and other variables that influence the dimensional stability of the materials of interest. A brief classification of various materials in terms of their metallurgical structure and susceptability to dimensional instability is presented.
- Other Subject(s):
- NASA Technical Reports Server (NTRS) Collection.
- Document ID: 19830004958.
Accession ID: 83N13229.
- No Copyright.
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