Modeling the two-stage creep-aging behaviors of an Al-Cu-Mg alloy

Y. C. Lin; Yu Qiang Jiang; Guan Liu; Shengfeng Qin

doi:10.1088/2053-1591/aad65f

Modeling the two-stage creep-aging behaviors of an Al-Cu-Mg alloy

Y. C. Lin, Yu Qiang Jiang, Guan Liu, Shengfeng Qin

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

10 Citations (Scopus)

Abstract

Two-stage creep-aging (TSCA) experiments of an Al-Cu-Mg alloy are carried out at various temperatures and tensile stresses. The effects of the second-stage creep-aging temperature (SSCAT) and tensile stress on the TSCA behaviors are investigated. The SSCAT and tensile stress greatly influence the creep-aging behaviors of the studied alloy. The creep strain and minimum creep rate increase as the SSCAT and tensile stress are increased. In creep-aging process, the interactions between work hardening and recovery softening induce the variations of creep strain with SSCAT and tensile stress. An improved constitutive model is put forward to forecast the TSCA behaviors of the studied alloy. In the improved model, the work hardening and the strong coupling effects of the SSCAT/tensile stress on the microstructures are taken into consideration. The small discrepancy of the predicted and measured creep strains illustrates that the improved constitutive model can commendably describe the TSCA behaviors of the studied alloy.

Original language	English
Article number	096514
Number of pages	13
Journal	Materials Research Express
Volume	5
Issue number	9
DOIs	https://doi.org/10.1088/2053-1591/aad65f
Publication status	Published - 10 Aug 2018

Keywords

aging precipitates
aluminum alloy
constitutive model
dislocation
two-stage creep-aging

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10.1088/2053-1591/aad65f

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title = "Modeling the two-stage creep-aging behaviors of an Al-Cu-Mg alloy",

abstract = "Two-stage creep-aging (TSCA) experiments of an Al-Cu-Mg alloy are carried out at various temperatures and tensile stresses. The effects of the second-stage creep-aging temperature (SSCAT) and tensile stress on the TSCA behaviors are investigated. The SSCAT and tensile stress greatly influence the creep-aging behaviors of the studied alloy. The creep strain and minimum creep rate increase as the SSCAT and tensile stress are increased. In creep-aging process, the interactions between work hardening and recovery softening induce the variations of creep strain with SSCAT and tensile stress. An improved constitutive model is put forward to forecast the TSCA behaviors of the studied alloy. In the improved model, the work hardening and the strong coupling effects of the SSCAT/tensile stress on the microstructures are taken into consideration. The small discrepancy of the predicted and measured creep strains illustrates that the improved constitutive model can commendably describe the TSCA behaviors of the studied alloy.",

keywords = "aging precipitates, aluminum alloy, constitutive model, dislocation, two-stage creep-aging",

author = "Lin, {Y. C.} and Jiang, {Yu Qiang} and Guan Liu and Shengfeng Qin",

year = "2018",

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doi = "10.1088/2053-1591/aad65f",

language = "English",

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T1 - Modeling the two-stage creep-aging behaviors of an Al-Cu-Mg alloy

AU - Lin, Y. C.

AU - Jiang, Yu Qiang

AU - Liu, Guan

AU - Qin, Shengfeng

PY - 2018/8/10

Y1 - 2018/8/10

N2 - Two-stage creep-aging (TSCA) experiments of an Al-Cu-Mg alloy are carried out at various temperatures and tensile stresses. The effects of the second-stage creep-aging temperature (SSCAT) and tensile stress on the TSCA behaviors are investigated. The SSCAT and tensile stress greatly influence the creep-aging behaviors of the studied alloy. The creep strain and minimum creep rate increase as the SSCAT and tensile stress are increased. In creep-aging process, the interactions between work hardening and recovery softening induce the variations of creep strain with SSCAT and tensile stress. An improved constitutive model is put forward to forecast the TSCA behaviors of the studied alloy. In the improved model, the work hardening and the strong coupling effects of the SSCAT/tensile stress on the microstructures are taken into consideration. The small discrepancy of the predicted and measured creep strains illustrates that the improved constitutive model can commendably describe the TSCA behaviors of the studied alloy.

AB - Two-stage creep-aging (TSCA) experiments of an Al-Cu-Mg alloy are carried out at various temperatures and tensile stresses. The effects of the second-stage creep-aging temperature (SSCAT) and tensile stress on the TSCA behaviors are investigated. The SSCAT and tensile stress greatly influence the creep-aging behaviors of the studied alloy. The creep strain and minimum creep rate increase as the SSCAT and tensile stress are increased. In creep-aging process, the interactions between work hardening and recovery softening induce the variations of creep strain with SSCAT and tensile stress. An improved constitutive model is put forward to forecast the TSCA behaviors of the studied alloy. In the improved model, the work hardening and the strong coupling effects of the SSCAT/tensile stress on the microstructures are taken into consideration. The small discrepancy of the predicted and measured creep strains illustrates that the improved constitutive model can commendably describe the TSCA behaviors of the studied alloy.

KW - aging precipitates

KW - aluminum alloy

KW - constitutive model

KW - dislocation

KW - two-stage creep-aging

U2 - 10.1088/2053-1591/aad65f

DO - 10.1088/2053-1591/aad65f

M3 - Article

SN - 2158-5849

VL - 5

JO - Materials Research Express

JF - Materials Research Express

IS - 9

M1 - 096514

ER -

Modeling the two-stage creep-aging behaviors of an Al-Cu-Mg alloy

Abstract

Keywords

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