Thermomechanical processing of a molybdenum alloy using hydrostatic extrusion

Raffo, Peter L.

doi:10.1007/bf03037844

Cited by 3 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…the entire hafnium and carbon content was available to form precipitates during aging. [1][2][3][4][5][6] For the present PM processed material, APT measurements in the as-sintered condition revealed a hafnium content of y0 . 12% and no carbon in solid solution.…”

Section: Discussionmentioning

confidence: 99%

“…Outstanding mechanical properties, particularly for thermomechanically processed materials, were reported. [1][2][3][4][5][6] The aim of the present work was to clarify the precipitation mechanism of small hafnium carbides in the PM processed alloy MHC, as sintered and following thermo-mechanical processing (TMP). The TMP applied involved deformation and heat treatment of as-sintered specimens in a high temperature deformation dilatometer.…”

mentioning

confidence: 99%

See 1 more Smart Citation

On the precipitation mechanism in the molybdenum based alloy MHC (Mo–Hf–C)

Lang¹,

Pohl²,

Schatte³

et al. 2014

Powder Metallurgy

View full text Add to dashboard Cite

The precipitation mechanism of small hafnium carbides in the sintered and thermo-mechanically processed molybdenum based alloy MHC (Mo–0·65Hf– 0·65C (at.-%)) is reported. Light and scanning electron microscopy revealed hafnium oxides, large hafnium carbides and molybdenum carbide layers at the grain boundaries in the as-sintered material. Additionally, atom probe tomography showed a residual dissolved content of 0·12 at.-%Hf, but no carbon in solid solution. After thermo-mechanical processing of the as-sintered material in a deformation dilatometer, transmission electron microscopy revealed small hafnium carbides with diameters of 10–100 nm. These carbides were preferentially located at dislocations and dislocation networks. Without deformation prior to aging, no formation of small hafnium carbides was observed. X-ray diffraction confirmed that decomposition of molybdenum carbides had occurred, which delivered the carbon for the formation of strain induced precipitates.

show abstract