An investigation of hot deformation response of particulate-reinforced magnesium+9% titanium composite

Abstract

The deformation response of magnesium based metal matrix composite was investigated by means of hot compression tests. The flow curves were obtained in the temperature and strain rate range of 300-500 °C and 0.001-1 s -1 respectively in order to obtain the processing maps of the studied material and interpreting them on the basis of the dynamic material model. Micro-structural characterization studies conducted on the deformed composite samples, using optical and scanning electron microscopy, revealed a recrystallized grain morphology, debonding of Titanium particles, particle breakage and cracking of the matrix. The observations were performed in order to describe the behavior of the material under hot forming operation in terms of material damage and micro-structural modification.

Differentiating the mechanical response of hierarchical magnesium nano-composites as a function of temperature

“…Mg and its alloys often start losing their strength at temperature as low as 90°C making them unsuitable for many applications that require certain threshold strength at higher temperature. Although in last few decades, significant work has been performed on quasi-static characterization of Mg or Mg alloys at ambient temperatures [5][6][7][8][9][10], little research has been carried out at high temperature.…”

Effect of temperature and strain rate on compressive response of extruded magnesium nano-composite

“…Magnesium-based composites are the most suitable for modern industrial applications in which weight is a critical problem due to its excellent specific strength and dimensional stability [3]. But magnesium and its alloys are having poor formability at room temperature because of its hexagonal close-packed crystal (HCP) structure.…”

Constitutive behavior of Csf/AZ91D composites compressed at elevated temperature and containing a small fraction of liquid

“…In general, the mechanical behavior of composites containing liquid phase depends on the deformation conditions as well as the proportion and morphology of liquid phase, while the latter dependents on the metallurgical condition. For the magnesium matrix composites, the mechanical behavior of magnesium matrix composite containing liquid phase were less reported although many attempts have been devoted to understand their hot tensile [15,16], compressive [17][18][19] or superplastic [20,21] deformation behaviors in the solid state.…”