Properties of alloy TsM-10

Weldable ductile molybdenum alloy development

“…The ductile-laminate failure mode and microstructure for Alloys #4, #5, and #6 is shown in Fig. 6 to consist of elongated, sheet-like grains similar in shape to those observed for wrought unalloyed molybdenum and other molybdenum alloys [1,2,[6][7][8][9][10][11][12][20][21][22]. The ductile laminate failure mode for molybdenum alloys is produced by fracture initiation at grain boundaries that leaves ligaments of sheet-like grains that neck to failure with a high degree of plasticity [20][21][22].…”

“…The segregation of zirconium, boron, and carbon to grain boundaries for these Mo-Zr-B alloys resulted in suppressed oxygen concentration at grain boundaries preventing embrittlement in the HAZ of these welds [4,5]. Motivation for that earlier work with Mo-Zr-B alloys was based on earlier efforts by several Russian investigators on similar boron-containing alloys TsM-6 (Mo-Zr-B) and TsM-10 (Mo-Al-B) where improved weld properties were observed [12][13][14]. The zirconium and/or aluminum may also act as a gettering agent for oxygen.…”

“…The compositions of the alloys were selected to bound previous work on Mo-Zr-B alloys of 1500 ppm Zr and 6 ppm B and Mo-Al-B alloys of 30 ppm Al and 10 ppm B [3][4][5][12][13][14]. Microstructure examinations are performed using metallography, fractography, and atom probe tomography.…”

Deformation and fracture properties in neutron irradiated pure Mo and Mo alloys

“…Since polycrystalline molybdenum can inherently weak grain boundaries, grain boundary strengthening and refinement techniques have been used to prevent or delay grain boundary embrittlement [13][14][15][16][17][18][19][20][21][22][23][24][25]. Significant improvement in ductility and fracture toughness has been achieved so far mainly by controlling impurities, reducing the grain size, and adding alloy elements such as Re, Ti, Zr, Al, B, and C, or oxide and carbide particles.…”