Texture Evolution during Deformation of a Mo-Hf-C Alloy Studied with Electron Backscatter Diffraction

Complementary High Spatial Resolution Methods in Materials Science and Engineering

“…In this image, the grain orientations present in the Mo matrix are shown parallel to the loading direction (LD), which is schematically displayed in the inset in Figure 1b. [4] Such a behavior is well known for body centered cubic (bcc) metals like molybdenum, as reported in refs. [4] Such a behavior is well known for body centered cubic (bcc) metals like molybdenum, as reported in refs.…”

“…[4] Such a behavior is well known for body centered cubic (bcc) metals like molybdenum, as reported in refs. [11] However, after deformation (w ¼ 0.30) and [4] : (a) as-sintered MHC microstructure exhibiting random grain orientations; (b) as-deformed MHC microstructure after deformation with a logarithmic deformation degree of w ¼ 0.30. [11] However, after deformation (w ¼ 0.30) and [4] : (a) as-sintered MHC microstructure exhibiting random grain orientations; (b) as-deformed MHC microstructure after deformation with a logarithmic deformation degree of w ¼ 0.30.…”

“…For this reason, they are used, for example, for modern rotating X-ray anodes as well as for extrusion and forging dies. [4] After sintering the microstructure of MHC consists of large HfO 2 particles, Mo 2 C at the grain boundaries and large mm-sized plate-like shaped HfC particles. [1] Especially the Mo-Hf-C alloy, named MHC, possessing a nominal composition of 0.65 at.% Hf and 0.65 at.% C, reveals a good balance between its high strengthening potential (%1 vol.% HfC may be used for precipitation hardening) and its processability.…”

“…[24][25][26] Separate investigations in order to quantify these contributions are already in progress. [4] This means that also more than 50 vol% of the nm-sized HfC particles have a distinct alignment to the incident neutron beam, which results in the formation of streaks. These streaks originate from the special alignment of the small strain-induced carbides, which precipitate during aging in the textured matrix of deformed MHC.…”