WebJul 25, 2024 · In this stage, the Hall-Petch effect via grain size refinement from 150 μm to 45 nm is the dominating strengthening mechanism. (ii) For εs = 92 (Stage II), the hardness and strength of the... WebThe dynamic Hall-Petch relation was established by the effective grain size, which was similar at strains of up to 0.20 in Ti-15Mo alloy with static grain sizes of 29 μm and 108 μm. The decreasingly modified Hall-Petch coefficient was resulted from the successive occurrence of twinning activation, twinning suppression, and the twin ...
Dynamic Hall-Petch - ScienceDirect
WebOct 19, 2024 · The dynamic Hall-Petch relation was established by the effective grain size, which was similar at strains of up to 0.20 in Ti–15Mo alloy with static grain sizes of 29 μm … 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 … shapes of laa
The Hall–Petch and inverse Hall–Petch relations and the hardness of
WebJan 4, 2024 · The strain hardening mechanism of TWIP steel is still under debate in the literature. One view considers that dislocation pile-ups at twin boundaries provide strong back-stress and therefore provide “dynamic Hall–Petch” effect and high strain hardening rate [11, 12], which was cited by many researchers [13,14,15,16,17]. 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 27, 2024 · By increasing obstacles to dislocation glide and leading to the so-called ‘dynamic Hall-Petch effect’, nano-twins result in higher work-hardening and ductility in later stages of deformation. However, the heterogeneity of the grain structure in the hi-HGS material imparts additional Θ when compared with CG CCA. shapes of molecules a level