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aging-phenomena
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Stress-aware routing to mitigate aging effects in SRAM-based FPGAs
, Article 26th International Conference on Field-Programmable Logic and Applications, FPL 2016, 29 August 2016 through 2 September 2016 ; 2016 ; 9782839918442 (ISBN) ; Omidi, B ; Amrouch, H ; Henkel, J ; Asadi, H ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2016
Abstract
Continuous shrinking of transistor size to provide high computation capability along with low power consumption has been accompanied by reliability degradations due to e.g., aging phenomenon. In this regard, with huge number of configuration bits, Field-Programmable Gate Arrays (FPGAs) are more susceptible to aging since aging not only degrades the performance, it may additionally result in corrupting the configuration cells and thus causing permanent circuit malfunctioning. While several works have investigated the aging effects in Look-Up Tables (LUTs), the routing fabric of these devices is seldom studied - even though it contributes to the majority of FPGAs' resources and configuration...
A study on subsequent static aging and mechanical properties of hot-Rolled AA2017
, Article Journal of Materials Engineering and Performance ; Vol. 23, issue. 8 , 2014 , p. 2894-2904 ; Serajzadeh, S ; Sharif University of Technology
Abstract
In this work, the effects of rolling parameters, cooling media, and deformation path on mechanical properties and aging behavior of hot-rolled AA2017 were studied. First, hot-rolling experiments were conducted under different working conditions, and the rolled strips were then aged at room temperature for up to 57 days during which hardness and tensile tests were carried out to record the changes in the mechanical properties of the alloy. Furthermore, due to the importance of static recrystallization on subsequent aging behavior, the rate of recrystallization was also computed. To this end, a mathematical model was developed to predict thermomechanical responses during hot rolling using the...
Study on static strain aging of 6082 aluminium alloy
, Article Materials Science and Technology ; Volume 26, Issue 2 , Jul , 2010 , Pages 169-175 ; 02670836 (ISSN) ; Karimi Taheri, A ; Sharif University of Technology
2010
Abstract
In this study both the quench aging and static strain aging kinetics of a 6082 Al alloy were investigated at a temperature range of 130-200°C using the Vickers hardness and tensile test. The activation energy and dislocation density were determined at different stages of the aging phenomenon. The former was used to analyse the kinetics of aging and the latter to interpret the competition of strengthening and recovery mechanisms during aging. It is shown that different activation energies are achieved depending on the aging time and temperature relating to formation of appropriate precipitates at different stages of aging. Moreover, it is revealed that prestrain reduces the activation energy....
Evolution of microstructures and mechanical properties in similar and dissimilar friction stir welding of AA5086 and AA6061
, Article Materials Science and Engineering A ; Volume 528, Issue 28 , 2011 , Pages 8071-8083 ; 09215093 (ISSN) ; Serajzadeh, S ; Kokabi, A. H ; Sharif University of Technology
2011
Abstract
In this work, thermo-mechanical behavior and microstructural evolution in similar and dissimilar friction stir welding of AA6061-T6 and AA5086-O have been investigated. Firstly, the thermo-mechanical behaviors of materials during similar and dissimilar FSW operations have been predicted using three-dimensional finite element software, ABAQUS, then, the mechanical properties and the developed microstructures within the welded samples have been studied with the aid of experimental observations and model predictions. It is found that different strengthening mechanisms in AA5086 and AA6061 result in complex behaviors in hardness of the welded cross section where the hardness variation in similar...