High temperature deformation of polycrystalline C40 Mo(Si,Al)2

Polycrystalline Mo(Si,Al)(2) with C40 crystal structure was deformed in compression with a strain rate of 10(-4) s(-1) at 1300 degrees C. The specimens were deformed to a strain of 10%-15% and showed maximum stresses around 150 MPa prior to pronounced softening. No crack formation or significant increase in porosity could be observed. Post-test microstructure analysis revealed that the material was inhomogeneously deformed on both inter and intragranular levels. Dynamic recrystallization occurred alongside low angle grain boundary formation in highly deformed grains. Furthermore, complex intragranular deformation fields suggest that slip systems other than < 2 (1) over bar(1) over bar0 >[0001] may be active during deformation.

Automated summary

Polycrystalline Mo(Si,Al)(2) with C40 crystal structure was deformed in compression at a high temperature. The study revealed characteristics such as maximum stress and strain rate, as well as the occurrence of dynamic recrystallization and low angle grain boundary formation.