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Study of Plastic Deformation in Binary Aluminum Alloys by Internal-Friction Methods (1959)

Manning, G. K. ; Olson, E. C. ; Maringer, R. E. ; [et al.]

In: CASI

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Publication Date: 2019-08-16

Description: The damping capacity of several aluminum-copper alloys has been investigated during tensile elongation. This damping is shown to depend on strain rate, strain, temperature, alloy content, and heat treatment. A tentative hypothesis, based on the acceleration of solute atom diffusion by deformation-produced vacancies, is proposed to account for the observed behavior. Internal-friction maxima are observed in deformed aluminum and aluminum-copper alloys at -70 deg and -50 deg C. The peaks appear to be relatively insensitive to frequency and alloy content, but they disappear after annealing at temperatures nearing the recrystallization temperature.

Keywords: Metallic Materials

Type: NASA-MEMO-3-3-59W

Format: application/pdf

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