Primary-transient creep and anelastic backflow of pure copper deformed at low temperatures and ultra-low strain rates

Jun jie SHEN, Ken ichi IKEDA, Satoshi Hata, Hideharu Nakashima

研究成果: ジャーナルへの寄稿記事

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Creep and anelastic backflow behaviors of pure copper (4N Cu) with grain size dg=40 μm were investigated at low temperatures of T<0.3Tm (Tm is melting point) and ultra-low creep rates of ɛ˙=1×10−10s−1 by a high strain-resolution measurement (the helicoid spring specimen technique). Analysis of creep data was based on the scaling factors of creep curves instead of the conventional extrapolated steady-state creep rate. Power-law creep equation is suggested to be the best for describing the primary transient creep behavior, because the pre-parameter does not apparently change with elapsed time. The observed anelastic strains are 1/6 of the calculated elastic strains, and linear viscous behavior was identified from the logarithm plot of the anelastic strain rate versus anelastic strain (slope equals 1). Therefore, the creep anelasticity is suggested to be due to the unbowing of there-dimensional network of dislocations.

元の言語英語
ページ(範囲)1729-1735
ページ数7
ジャーナルTransactions of Nonferrous Metals Society of China (English Edition)
26
発行部数7
DOI
出版物ステータス出版済み - 7 1 2016

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Geotechnical Engineering and Engineering Geology
  • Metals and Alloys
  • Materials Chemistry

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