Interstitial Solutes and Deformation in Nb and Nb Single Crystals
- Materials Science and Engineering Laboratory, National Institute of Standards and Technology, 100 Bureau Dr. MS 8553, Gaithersburg, MD 20899 (United States)
- Thomas Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, VA 23606 (United States)
Experiments were conducted on high purity single and polycrystalline niobium samples to determine the influence of low concentrations of interstitial impurities on mechanical properties and to evaluate the feasibility of mechanical properties to detect, identify, and quantify diffusible interstitial content. Time series and spectral analysis were used to evaluate behavior during plastic flow. Dynamic modulus analysis and strain relaxation/recovery experiments were used to evaluate anelastic relaxations during elastic loading. Serrations during plastic flow were found to occur at discrete frequency ranges with amplitudes that varied with interstitial content. Anelastic relaxations were found at specific temperatures or time constants with amplitudes that varied with interstitial content. The results indicate that with considerable research and development, mechanical properties could be used to measure the diffusible interstitial content of niobium and partition the total interstitial content between diffusible (harmful) and non-diffusible (non-harmful) forms.
- OSTI ID:
- 21067383
- Journal Information:
- AIP Conference Proceedings, Vol. 927, Issue 1; Conference: International niobium workshop on single crystal - large grain niobium technology, Araxa (Brazil), 30 Oct - 1 Nov 2006; Other Information: DOI: 10.1063/1.2770679; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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