Studying High-Frequency Acoustic Emission during Discontinuous Creep in an Aluminum–Magnesium Alloy

On the mechanisms of nucleation and subsequent development of the PLC bands in an AlMg alloy

“…However, Chihab et al [23] have not verified their hypotheses due to the lack of direct strain measurements in their experiments. The results of high-speed filming, which suggest a possibility of the mixed scenario of the PLC band nucleation, were presented later [8][9][10][11]38,41].…”

“…The phenomenon of plastic instability in alloys, known as the Portevin-Le Chatelier (PLC) effect is manifested in strain localizations in the form of deformation bands resulting in repeated serrations on the stress-strain curves [1][2][3]. Numerous studies in this field have led to significant progress in understanding the PLC effect [4][5][6][7][8][9][10][11]. The PLC mechanism is normally associated with dynamic strain aging (DSA), i.e., pinning of dislocations by impurity atoms and alloying solutes during deformation, while dislocations are blocked on obstacles [12][13][14][15].…”

Diszlokációlavinák kísérleti vizsgálata

“…További munkák a tömbi alumínium ötvözetek deformációs sávjainak dinamikájának kapcsolatát tárták fel az AE jelekkel. Kísérleti eredmények alapján a deformáció terjedésének akadozó mozgása az egyedi AE jelek detektálásával egyidejűnek mutatkoztak [86].…”