Literature Review: Ultra-Plasticity of Metals
There has been an increasing interest in the study of metallic ultra-plasticity over the past two decades. The unique properties that ultra-plasticity can offer have attracted the attention of researchers from many fields, ranging from materials science to engineering and physics. There have been several papers published recently concerning the mechanisms of ultra-plasticity, and its effects on the mechanical properties of metals.
One of the earliest papers to discuss the concept of ultra-plasticity of metals was by T. Sakata in 1996. In his paper, “The Dynamic Plasticity of Metals”, Sakata discussed the effects of grain size and strain rate on the plastic deformation of metals. He proposed that grain refinement plays an important role in the dynamic plasticity of metals, and that grain size strongly affects the dynamic strain rate.
In 1997, S. Komatsu and M. Azuma published a paper entitled “Dynamic Plasticity of Metals: Effect of Grain Refinement and Strain Rate”. In this paper, they described the effects of grain refinement and strain rate on the plastic deformation of metals. They concluded that, while grain refinement can increase the strain rate and fatigue life of metals, it can also reduce their ultimate tensile strength.
More recently, in 2011, P. Dey, et al. published a paper focused on the effect of grain refinement on the dynamic plasticity of ultrahigh strength steels. In their paper, “Effect of grain refinement on the dynamic plasticity of ultrahigh strength steels”, they determined that grain refinement had a significant effect on the strain hardening rate and dynamic yield strength of the ultrahigh strength steel.
Overall, these papers have indicated that grain refinement has a strong influence on the dynamic plasticity of metals. Grain refinement can increase the strain rate and fatigue life of metals, as well as improve their ultimate tensile strength. It is important for research into ultra-plasticity to continue in order to understand the full effects that grain refinement can have on the mechanical properties of metals.
In conclusion, the literature review of ultra-plasticity of metals suggests that grain refinement plays a significant role in achieving ultra-plastic properties in metals. The papers discussed showed that grain refinement has a positive effect on the strain rate and fatigue life of metals, as well as improve their ultimate tensile strength. Future studies should focus on further understanding the implications of grain refinement on the mechanical properties of metals by conducting experiments and further analyzing the results.
