AMPEX Multi-Channel Recording [tech note]

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This result supports the idea that GBS is connected with microstructural changes of grain boundaries [27]. It is to note that in the best case (12 passes) the contribution of GBS to creep strain is only 33%. 0 Table 3. 15). Figure 26. Example of grain boundary sliding in the ECAPed aluminium (route Bc, 8 passes) after creep testing at 473 K and 15 MPa. Tensile stress axis is horizontal. 3. Creep deformation mechanisms The mechanisms controlling the creep properties of pure metals have been usually identi‐ fied from the dependence of the minimum and/or steady-state creep rate ε˙ m on stress σ, ab‐ solute temperature T and grain size d, using a power-law expression of the form ε˙ m = Aσ n (1 / d ) p exp( − Qc / RT ) (3) where Qc is the activation energy for creep.

Mater Trans, 49, 15-19. [13] Betekhtin, V. , Kadomtsev, A. , & Saxl, I. (2007). Nanoporosity of Fine-Crystalline Aluminium and an Aluminium-Based Alloy. Phys Solid State, 49, 1787-1790. [14] Betekhtin, V. , Kadomtsev, A. , & Skle‐ nicka, V. (2007). 2%Sc Alloy and Copper. Mater Sci Forum, 567-568, 93-96. [15] Betekhtin, V. , Kardashev, B. , Kadomtsev, A. , & Naryko‐ va, M. V. (2010). 2wt%Sc Alloy. Phys Solid State, 52, 1517-1523. [16] Betekhtin, V. , Kadomtsev, A. , & Narykova, M. V. (2011). Effect of Hydrostatic Pressure on Defect Structure and Durability of Ultrafine-Grained Alumi‐ nium.

2001). An Eval‐ uation of the Flow Behavior During High Strain Rate Superplasticity in an Al-Mg-Sc Alloy. Metall Mater Trans A, 32, 707-716. , & Horita, Z. (2006). 2%Sc Alloy Processed by Equal-Channel Angu‐ lar Pressing. In: Zhu Y, Langdon T G, Horita Z, Zehetbauer M J, Semiatin S L, Lowe T C, editors. Ultrafine Grained Materials IV, Warrendale, TMS, 459-464. , & Horita, Z. (2007). Effect of Equal-Channel Angular Pressing (ECAP) on Creep in Aluminium Alloys. Mater Sci Forum, 539-543, 2904-2909.

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