WebJun 1, 2024 · The structural changes were characterized by the development of continuous dynamic recrystallization. A decrease in the rolling temperature resulted in significant grain/subgrain refinement and... WebOct 12, 2024 · The present work mainly investigated the effect of extrusion temperatures on the microstructure and mechanical properties of Mg-1.3Zn-0.5Ca (wt.%) alloys. The alloys were subjected to extrusion at 300 °C, 350 °C, and 400 °C with an extrusion ratio of 9.37. The results demonstrated that both the average size and volume fraction of dynamic …
Metals Free Full-Text Development of Nanocrystalline 304L …
WebThe enhancement of strain hardening rate by highly coherent nano-precipitates impeding dislocations glide, dynamic Hall-Petch effect of multiple twins and numerous 3D obstacle networks of dislocations should be responsible for the significant elongation improvement. This study thus introduces new insights into defect alleviation, microstructure ... WebMar 27, 2024 · The variants form progressively a dense twinning network in the beta matrix, acting as strong barriers to reduce the mean free path of dislocation slip, i.e. the dynamic Hall–Petch effect. Upon increasing the strain to 0.10 and to 0.15, the multiplication and growth of both variants are clearly noticed in Figure 2 (b,c). https newsela articles
Design metastability in high-entropy alloys by tailoring unstable …
WebJan 1, 2008 · The Hall-Petch slope increases as a function of strain, from 350 MPa mu m (1/2) for the yield stress to 630 MPa mu m (1/2) for the … WebJan 17, 2024 · A constitutive model for automobile steel with high elongation needs to be established to predict the dynamic deformation behavior under hydroforming applications. ... a series of autom … Effect of Material Anisotropy on the Mechanical Response of Automotive Steel under High Strain Rates ... Cowper-Symonds model; Hall–Petch … Web“dynamic Hall-Petch” effect). Design of TWIP steels processing requires the control of their mechanical properties through the control of the structural variables of which that properties depend. https network