Effect of strain rate on impact response and dislocation substructure of 6061-T6 aluminum alloy

Woei Shyan Lee; Jia Chyuan Shyu; Su Tang Chiou

doi:10.1016/S1359-6462(99)00308-5

Effect of strain rate on impact response and dislocation substructure of 6061-T6 aluminum alloy

Woei Shyan Lee, Jia Chyuan Shyu, Su Tang Chiou

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

75 Citations (Scopus)

Abstract

The dynamic deformation mechanisms and the effects of strain rate on the impact strength and dislocation substructure of 6061-T6 Al alloy were studied to optimize the alloy's deformation and fracture performance under high loading rates. The impact response of 6061-T6 Al alloy was affected strongly by applied strain rate, resulting in variations of work hardening rate, strain rate sensitivity and activation volume. The rate of work hardening decreased with strain and strain rate, and was related linearly to the inverse of flow stress. Strain rate sensitivity decreased with work hardening stress. However, for activation volume, the inverse was found. Substructure evolution consisted of dislocation cells and numerous dislocation loops.

Original language	English
Pages (from-to)	51-56
Number of pages	6
Journal	Scripta Materialia
Volume	42
Issue number	1
DOIs	https://doi.org/10.1016/S1359-6462(99)00308-5
Publication status	Published - 1999 Dec 17

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/S1359-6462(99)00308-5

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title = "Effect of strain rate on impact response and dislocation substructure of 6061-T6 aluminum alloy",

abstract = "The dynamic deformation mechanisms and the effects of strain rate on the impact strength and dislocation substructure of 6061-T6 Al alloy were studied to optimize the alloy's deformation and fracture performance under high loading rates. The impact response of 6061-T6 Al alloy was affected strongly by applied strain rate, resulting in variations of work hardening rate, strain rate sensitivity and activation volume. The rate of work hardening decreased with strain and strain rate, and was related linearly to the inverse of flow stress. Strain rate sensitivity decreased with work hardening stress. However, for activation volume, the inverse was found. Substructure evolution consisted of dislocation cells and numerous dislocation loops.",

author = "Lee, {Woei Shyan} and Shyu, {Jia Chyuan} and Chiou, {Su Tang}",

note = "Funding Information: We would like to acknowledge the support of the works by the National Science Council of Taiwan, R. O. C. under contrast No. NSC 86-2212-E006-015. ",

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AU - Lee, Woei Shyan

AU - Shyu, Jia Chyuan

AU - Chiou, Su Tang

N1 - Funding Information: We would like to acknowledge the support of the works by the National Science Council of Taiwan, R. O. C. under contrast No. NSC 86-2212-E006-015.

PY - 1999/12/17

Y1 - 1999/12/17

N2 - The dynamic deformation mechanisms and the effects of strain rate on the impact strength and dislocation substructure of 6061-T6 Al alloy were studied to optimize the alloy's deformation and fracture performance under high loading rates. The impact response of 6061-T6 Al alloy was affected strongly by applied strain rate, resulting in variations of work hardening rate, strain rate sensitivity and activation volume. The rate of work hardening decreased with strain and strain rate, and was related linearly to the inverse of flow stress. Strain rate sensitivity decreased with work hardening stress. However, for activation volume, the inverse was found. Substructure evolution consisted of dislocation cells and numerous dislocation loops.

AB - The dynamic deformation mechanisms and the effects of strain rate on the impact strength and dislocation substructure of 6061-T6 Al alloy were studied to optimize the alloy's deformation and fracture performance under high loading rates. The impact response of 6061-T6 Al alloy was affected strongly by applied strain rate, resulting in variations of work hardening rate, strain rate sensitivity and activation volume. The rate of work hardening decreased with strain and strain rate, and was related linearly to the inverse of flow stress. Strain rate sensitivity decreased with work hardening stress. However, for activation volume, the inverse was found. Substructure evolution consisted of dislocation cells and numerous dislocation loops.

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Effect of strain rate on impact response and dislocation substructure of 6061-T6 aluminum alloy

Abstract

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