کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5455187 | 1514637 | 2017 | 37 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Flow stress and electrical resistivity in plastically deformed Al subjected to intermittent annealing
ترجمه فارسی عنوان
استرس جریان و مقاومت الکتریکی در آلومینیوم آلومینیومی تغییر شکل داده شده در معرض آنلایز متناوب
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کلمات کلیدی
آلومینیوم، تغییر شکل پلاستیک استرس جریان مقاومت الکتریکی، تراکم جابجایی، رابطه اساسی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
The behaviour of the flow stress and electrical resistivity has been studied in pure Al polycrystals deformed at 4 K with intermittent annealing at temperatures up to 298 K. Electrical resistivity measurements permit discrimination between regimes of plastic flow determined by dislocation-dislocation interactions and dislocation-debris interactions. Continued deformation at 4 K occurs under dynamic quasi-equilibrium controlled by dislocation-dislocation interactions. This regime is represented by a Taylor-type stress - dislocation density relationship, Ïâ0.2μbÏ. The onset of immediate post-yielding deformation in annealed samples is dominated by dislocation-debris interactions and is characterized by a high rate of dislocation production and a low rate of flow stress increase than determined by dislocation-forest interactions. Upon annealing to 298 K, Al shows two regimes of correlated stress and resistivity recovery, controlled by the amount of energy release during annealing. The relationship between flow stress and density of dislocations for the component of recoverable and unrecoverable defects has been assessed from the experimental measurement data for two different scaling laws. It is found that while Taylor-type equation, ÏâÏ, gives good estimates of the flow stress for the density of dislocations determined from resistivity results in continuously deformed samples, it distorts considerably stress - dislocation density dependence in samples subjected to intermittent annealing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 706, 26 October 2017, Pages 256-268
Journal: Materials Science and Engineering: A - Volume 706, 26 October 2017, Pages 256-268
نویسندگان
M. Niewczas, D.-Y. Park,