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Fasteners with a Memory
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English
Abstract
Nitinol, a nickel-titanium alloy, exhibits the unique property of undergoing a temperature-dependent phase transformation. Associated with this phase transformation is a significant shape change that has led to the common designation of “memory material.” This shape change has been utilized to design mechanical fasteners which expand radially on transformation to produce interference fits for increased fatigue life components, give effective length reductions for high clamp-up forces, and form a rivet tail for low-cost installation. Various design concepts, manufacturing techniques, and mechanical properties are discussed.
Authors
Citation
Silha, C. and Schwenk, W., "Fasteners with a Memory," SAE Technical Paper 730900, 1973, https://doi.org/10.4271/730900.Also In
References
- Schwenk W. “Fabrication Techniques for Rivet Fasteners Utilizing 55-Nitinol.” Interim Technical Reports 1, 2, 3, 4 and 5; AFML IR-851-2
- Cooper E. Bower E. Cross B. “Investigation of the Unique Memory Properties of 55-Nitinol Alloy.” SAMPE 1969
- Jackson C. M. Wagner H. J. Wasilewski R. J. “55-Nitinol, The Alloy With a Memory; its Physical Metallurgy Properties and Applications.” NASA Bulletin SP5110 1972
- Wang F. E. “On the TiNi (Nitinol) Martensitic Transition.” Naval Ordnance Laboratory, NOLTR 72-4 1972
- Buehler W. J. Wang F. E. “A Summary of Recent Research on the Nitinol Alloys and their Potential Application in Ocean Engineering.” Ocean Engineering 1 1968 105 120