Fracture toughness of molybdenum sheet under brittle-ductile transition

Measuring the fracture toughness of molybdenum-0.5 pct titanium-0.1 pct zirconium and oxide dispersion-strengthened molybdenum alloys using standard and subsized bend specimens

“…Some of the results were obtained using specimens that were not shown in Figures 4 and 5. Some banding was observed in the microstructure of the ODS (Figures 6(g) and (h)) and precracked or specimens that were precracked using an EDM wire, [5,6] which violates the intent of the standard [20,21] and TZM (Figure 7(b)) molybdenum, which likely results from the mechanical working used to form the plate. A coarser may not provide the most accurate measure of fracture toughness.…”

“…in literature for molybdenum, TZM, and molybdenum-1 pct Zr. [4][5][6][7][8][9][10][11][12][13] Due to the crack-arrest behavior associated with compression-compression fatigue precracking, the fatigue precrack length beyond the notch was only 0.36 to 0.51 mm, and the shown in Figure 3 for fracture-toughness data. Thus, a more total length (a/W ) was nominally 0.37 to 0.46 for most of conservative measure of DBTT is obtained for molybdenum the tests, which does not strictly meet the ASTM E399 using fracture-toughness testing of precracked specimens.…”

“…The microstructures of the produces lower toughness values and a higher DBTT in longitudinal and transverse sections from fractured K IC comparison to molybdenum produced by arc casting. [1][2][3][4][5][6][7][8][9][10][11] specimens were metallographically evaluated with a Murakami's etch. Fractographic examinations were also performed using scanning electron microscopy.…”

“…[4][5][6][7][8][9][10][11][12][13] A MOLYBDENUM is a refractory metal that undergoes review of some fracture-toughness data for molybdenum no phase change for the bcc crystal structure from the ambiand molybdenum-based alloys has been reported. [4] Most of ent to the melting temperature (2610 ЊC).…”

Experimental study and computer simulation of fracture toughness of sheet metal after laser forming

“…For instance, Koval et al. [10] tested the fracture toughness of molybdenum sheet in the temperature range −196-300 • C. It was found that there is no monotonic temperature dependence of fracture toughness of molybdenum sheet because of the change in the cleavage crack nucleation mechanism. Singhal et al [11] tested the fracture toughness of Ti-62222 alloy sheet, which was exposed to high temperature for long times.…”