Relaxation effects in solid solutions arising from changes in local order. I. Experimental

Childs, Barney; Claire, A.D. Le

doi:10.1016/0001-6160(54)90119-4

Cited by 59 publications

(5 citation statements)

References 4 publications

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“…The activation energy of this peak is 1.81 T 0.08 eV. Moreover, Childs and Claire have observed a relaxation maximum in a Cu -7.0Al (wt.%) alloy at about 380 -C with an activation energy of 1.85 T 0.07 eV [20]. All of those results are in good agreement with the present result and thus the present P1 peak should also originate from the Zener relaxation.…”

Section: Resultssupporting

confidence: 91%

Zener relaxation peak in a Cu–Al–Mn shape memory alloy

et al. 2005

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Section: Resultssupporting

confidence: 91%

Zener relaxation peak in a Cu–Al–Mn shape memory alloy

et al. 2005

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“…2, give 146/151/171 kJ tool -1 for 19/13/6.5 at % A1 alloys. These values agree reasonably well with those for self-diffusion reported in the literature [32][33][34][35][36].…”

Section: Kinetic Analysissupporting

confidence: 91%

Ordered domain characterization in α-Cu-Al alloys from dissolution kinetics studies

Varschavsky

Donoso

1986

J Mater Sci

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Through microcalorimetric experiments, disperse order (DO) dissolution kinetics in preannealed e-Cu-AI alloys containing 1 9, 13 and 6.5 at% aluminium were adequately described by the integrated kinetic model function arising from the steady-state part of the diffusion field: f(y) = 1 -(1 -y)2/3. Domain sizes after the annealing treatment, and also critical radii, were determined from differential scanning calorimetry data analysis at different heating rates. The existence of critical radii indicates that the disperse-order dissolution process is a firstorder transition. Nevertheless, it was inferred that for very dilute alloys, only short-range order is present. After pre-annealing the alloys at different temperatures, volume fractions and domain concentrations were computed by employing the above kinetic model under high heating-rate conditions. On the basis of appropriate time constant and diffusion time calculations, the range of such temperatures compatible with equilibrium attainment was established. Prolonged pre-anneals alter the particle distribution, but do not influence either volume fractions or domain sizes. A semi-quantitative particle radius-particle concentration-temperature diagram was proposed for e-Cu-AI alloys.

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“…Childs and Claire also observed a relaxational IF peak in a Cu-7.0Al (wt.%) alloy at about 380 o C with an activation energy of 1.85±0.07 ev. [14] All of those results suggest that the present P1 peak may also arise from the Zener relaxation.…”

Section: Advanced Mechanical Designmentioning

confidence: 66%

Internal Friction Peaks in a Porous CuAlMn Shape Memory Alloy

Wang

Cui

Yan

et al. 2012

AMR

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Internal friction behavior of a porous CuAlMn shape memory alloy was examined. Two internal friction peaks appear at around 350 oC and 380 oC during the first heating process in the as-quenched specimen, but they disappear during the second or more heating process. Two other internal friction peaks are found at around 150 oC and 325 oC from the second heating process. Correlated mechanisms of the peaks are discussed.

show abstract

Relaxation effects in solid solutions arising from changes in local order. I. Experimental

Cited by 59 publications

References 4 publications

Zener relaxation peak in a Cu–Al–Mn shape memory alloy

Zener relaxation peak in a Cu–Al–Mn shape memory alloy

Ordered domain characterization in α-Cu-Al alloys from dissolution kinetics studies

Internal Friction Peaks in a Porous CuAlMn Shape Memory Alloy

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