Strain Rate Contribution due to Dynamic Recovery of Ultrafine-Grained Cu-Zr as Evidenced by Load Reductions during Quasi-Stationary Deformation at 0.5 T-m

Blum W, Dvorak J, Kral P, Eisenlohr P, Sklencka V (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Metals MDPI

Book Volume: 9

Journal Issue: 11

DOI: 10.3390/met9111150

Abstract

During quasi-stationary tensile deformation of ultrafine-grained Cu-0.2 mass%Zr at 673 K and a deformation rate of about 10(-4) s(-1) load changes were performed. Reductions of relative load by more than about 25% initiate anelastic back flow. Subsequently, the creep rate turns positive again and goes through a relative maximum. This is interpreted by a strain rate component E- associated with dynamic recovery of dislocations. Back extrapolation indicates that E- contributes the same fraction of (20 +/- 10)% to the quasi-stationary strain rate that has been reported for coarse-grained materials with high fraction of low-angle boundaries; this suggests that dynamic recovery of dislocations is generally mediated by boundaries. The influence of anelastic back flow on E- is discussed. Comparison of E- to the quasi-stationary rate points to enhancement of dynamic recovery by internal stresses. Subtraction of

Authors with CRIS profile

Wolfgang Blum Technische Fakultät

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Involved external institutions

Academy of Sciences of the Czech Republic (ASCR) / Akademie věd České republiky (AVČR) CZ Czech Republic (CZ) Michigan State University US United States (USA) (US)

How to cite

APA:

Blum, W., Dvorak, J., Kral, P., Eisenlohr, P., & Sklencka, V. (2019). Strain Rate Contribution due to Dynamic Recovery of Ultrafine-Grained Cu-Zr as Evidenced by Load Reductions during Quasi-Stationary Deformation at 0.5 T-m. Metals, 9(11). https://dx.doi.org/10.3390/met9111150

MLA:

Blum, Wolfgang, et al. "Strain Rate Contribution due to Dynamic Recovery of Ultrafine-Grained Cu-Zr as Evidenced by Load Reductions during Quasi-Stationary Deformation at 0.5 T-m." Metals 9.11 (2019).

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