A Study of Basic Processes Characterizing Dynamic Strain Ageing

Serrated flow and work hardening characteristics of Al-5356 alloy

“…It has to be noted that the Cottrell theory is based on bulk diffusion, whereas later on, theoretical and experimental investigations indicated the pipe diffusion mechanism, i.e. the solute diffusion along the dislocation lines, to be more relevant, in particular at moderate and lower temperatures [11][12][13][14][15][16][17]. This process is known as dynamic strain aging (DSA).…”

On the PLC effect in strain-rate and stress-rate controlled tests–studies by laser scanning extensometry

“…3a for t = 1000-1500 s). The phenomenon of decorrelation, which is to be ascribed to an exhaustion of DSA (core strengthening [35]), can also be recognized in the decrease of band strain ε b (Fig. 4) for high global strain ε (or stress σ), and it corresponds to an approach to the stable region (σ 2 ) in Fig.…”

Study on the out-of-plane deformation of the Portevin–Le Chatelier band by using digital shearography

“…This phenomenon is characteristic of serration yielding in stress-strain curves and localized deformation bands (PLC bands) in the sample. The PLC effect is generally explained by dynamic strain aging (DSA) [6][7][8][9][10], i.e., the dynamic interaction between mobile dislocations and solute atoms. When mobile dislocations are temporarily arrested at obstacles, the solute atoms diffuse to and pin them.…”