An age hardening model for interrupted ageing of the alloy AA6061
- Author
- Abbas Bahrami, Alexis Miroux and Leo Kestens (UGent)
- Organization
- Abstract
- Physically based age hardening and work hardening models have been developed to simulate the effect of interrupted ageing on the yield strength and hardening behavior of the Aluminum alloy 6061. Experimental results show that, depending on the interruption temperature, two secondary precipitation strengthening regimes exist during re-ageing: below 50 degrees C displaying almost no influence on the peak hardness of the alloy, and above 50 degrees C where a significant increase in hardness is observed. This behavior is modeled using the Kampmann-Wagner numerical (KWN) method. The developed age-hardening model is then combined with the Kocks-Mecking work-hardening model. The results indicate that although secondary precipitation above 50 degrees C could improve the yield strength, hardly does it have any effect on the work hardening behavior of the alloy. The experimental results show that the main effect of secondary precipitates is on the post-necking regime, where the higher volume fraction of secondary precipitates increases the strain after necking. An explanation is proposed based on the fact that secondary precipitates can act as slip distribution centers and therefore they may increase the homogeneity of slip distribution and the strain-to-fracture.
- Keywords
- SI-CU ALLOY, SECONDARY PRECIPITATION, ALUMINUM-ALLOYS, modeling, interrupted ageing, work hardening, secondary precipitation
Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-975199
- MLA
- Bahrami, Abbas, et al. “An Age Hardening Model for Interrupted Ageing of the Alloy AA6061.” STEEL RESEARCH INTERNATIONAL, 2008, pp. 224–31.
- APA
- Bahrami, A., Miroux, A., & Kestens, L. (2008). An age hardening model for interrupted ageing of the alloy AA6061. STEEL RESEARCH INTERNATIONAL, 224–231.
- Chicago author-date
- Bahrami, Abbas, Alexis Miroux, and Leo Kestens. 2008. “An Age Hardening Model for Interrupted Ageing of the Alloy AA6061.” STEEL RESEARCH INTERNATIONAL, 224–31.
- Chicago author-date (all authors)
- Bahrami, Abbas, Alexis Miroux, and Leo Kestens. 2008. “An Age Hardening Model for Interrupted Ageing of the Alloy AA6061.” STEEL RESEARCH INTERNATIONAL: 224–231.
- Vancouver
- 1.Bahrami A, Miroux A, Kestens L. An age hardening model for interrupted ageing of the alloy AA6061. STEEL RESEARCH INTERNATIONAL. 2008;224–31.
- IEEE
- [1]A. Bahrami, A. Miroux, and L. Kestens, “An age hardening model for interrupted ageing of the alloy AA6061,” STEEL RESEARCH INTERNATIONAL, pp. 224–231, 2008.
@article{975199,
abstract = {{Physically based age hardening and work hardening models have been developed to simulate the effect of interrupted ageing on the yield strength and hardening behavior of the Aluminum alloy 6061. Experimental results show that, depending on the interruption temperature, two secondary precipitation strengthening regimes exist during re-ageing: below 50 degrees C displaying almost no influence on the peak hardness of the alloy, and above 50 degrees C where a significant increase in hardness is observed. This behavior is modeled using the Kampmann-Wagner numerical (KWN) method. The developed age-hardening model is then combined with the Kocks-Mecking work-hardening model. The results indicate that although secondary precipitation above 50 degrees C could improve the yield strength, hardly does it have any effect on the work hardening behavior of the alloy. The experimental results show that the main effect of secondary precipitates is on the post-necking regime, where the higher volume fraction of secondary precipitates increases the strain after necking. An explanation is proposed based on the fact that secondary precipitates can act as slip distribution centers and therefore they may increase the homogeneity of slip distribution and the strain-to-fracture.}},
author = {{Bahrami, Abbas and Miroux, Alexis and Kestens, Leo}},
issn = {{1611-3683}},
journal = {{STEEL RESEARCH INTERNATIONAL}},
keywords = {{SI-CU ALLOY,SECONDARY PRECIPITATION,ALUMINUM-ALLOYS,modeling,interrupted ageing,work hardening,secondary precipitation}},
language = {{eng}},
location = {{Cracow, Poland}},
pages = {{224--231}},
title = {{An age hardening model for interrupted ageing of the alloy AA6061}},
year = {{2008}},
}