کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1627008 1516445 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigations on kinetics of Portevin–Le Chatelier effect in Al–4 wt.%Cu alloys
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Experimental investigations on kinetics of Portevin–Le Chatelier effect in Al–4 wt.%Cu alloys
چکیده انگلیسی

By employing the dynamic digital speckle pattern interferometry (DSPI) technology, the spatial kinematics features of Portevin–Le Chatelier (PLC) bands are vividly shown in terms of correlation fringe patterns. In this paper, three types of representative serrated flow on stress–time curves, combining with the position–time plots for the propagating PLC bands, have clearly classified the three types of PLC effect. Effect of strain and applied strain rates to the amplitudes of serrated stress drops is investigated and qualitatively interpreted via dynamic strain aging (DSA) mechanism. Evolution of the propagation velocity for type A and B bands versus strain and applied strain rate is also discussed, and is in good accordance with accepted previous work. Moreover, we note that the spatial correlation of PLC bands will diminish with decreasing specimen thickness.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 428, Issues 1–2, 31 January 2007, Pages 151–156
نویسندگان
, , , ,