Interstitial Solutes and Deformation in Nb and Nb Single Crystals

Journal Article · Thu Aug 09 04:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2770679· OSTI ID:21067383

Ricker, R E; Pitchure, D J ^[1]; Myneni, G R ^[2]

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1. Materials Science and Engineering Laboratory, National Institute of Standards and Technology, 100 Bureau Dr. MS 8553, Gaithersburg, MD 20899 (United States)
2. 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, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 927; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DEFORMATION
FLOW STRESS
GRAIN SIZE
IMPURITIES
INTERSTITIALS
LOADING
MECHANICAL PROPERTIES
MONOCRYSTALS
NIOBIUM
PLASTICITY
POLYCRYSTALS
RELAXATION
SOLUTES
STRAINS