High temperature deformation mechanisms in pure magnesium studied by nanoindentation
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Comparative study on high temperature deformation behavior and processing maps of Mg-4Zn-1RE-0.5Zr alloy with and without in-situ sub-micron sized TiB<inf>2</inf> reinforcement
2022, Journal of Magnesium and AlloysCitation Excerpt :Apart from this, deformation at a high strain rate increases stress concentration, resulting in the nucleation of voids and cracks. This is because at high strain rate, there is not sufficient time for the material to dissipate heat during hot deformation [49]. In the case of in-situ TiB2/ZE41 composite, the instability domains are smaller than those of the ZE41 alloy.
High temperature nano-indentation on the mechanical properties of Zr and Zr–Fe alloys: Experimental and theoretical analysis
2021, Mechanics of MaterialsCitation Excerpt :For example, Koch et al. (2015) studied the mechanical properties of Al–Cu alloy with HTNIT, and observed a continuous decrease of the hardness and Young's modulus but increase of the strain rate sensitivity with the increase of temperature up to 733 K. Xiao et al. (2019) carried out instrumented hardness measurements of recrystallized tungsten in the temperature range of 300 K–691 K by nano-indentation, and corresponding crystal plasticity finite element method (CPFEM) model was developed to help comprehend the macroscopic deformation and microstructural evolution behavior. Similarly, the NTNIT method has also been applied to some other structural materials like Cu (Franke et al., 2010), Mg (Sánchez-Martín et al., 2015) and Ni-based superalloys (Sawant et al., 2008), whereas, corresponding application for Zr alloys is still limited so far. It is also essential to develop mechanistic models and simulation methods to help clarify the fundamental mechanisms for the variation of materials properties (Argatov, 2010; Rezaei et al., 2018; Li et al., 2020a, 2020b).
Influence of temperature on crystallographic orientation induced anisotropy of microscopic wear in an AZ91 Mg alloy
2021, Tribology InternationalDeformation mechanisms of basal slip, twinning and non-basal slips in Mg–Y alloy by micropillar compression
2021, Materials Science and Engineering: AAtomistic and finite element study of nanoindentation in pure aluminum
2020, Materials Today CommunicationsCitation Excerpt :Chang et al. [40] used FEM to study nanoindentation in Cu nanowires and found that indenter tip radius is the key source of error in results. Martın et al. [41] studied the deformation mechanism using Atomic Force Microscopy (AFM) and finite element crystal plasticity simulations to observe the twinning activity. However, FEM simulations of nanoindentation based on bulk-scale material data may not be reliable since, mechanical properties such as yield stress, fracture strain etc. at nanoscale differ from those at bulk-scale due to presence of fewer defects.