Tensile properties and fracture mode of a wrought ODS molybdenum sheet following fast neutron irradiation at temperatures ranging from 300°C to 1000°C

Irradiation hardening in unalloyed and ODS molybdenum during low dose neutron irradiation at 300°C and 600°C

“…For example, an oxide dispersion strengthened (ODS) molybdenum alloy has exhibited excellent creep-resistance when the material is worked to produce a fine La-oxide dispersion and a fine grain size (%1.2 lm) [20][21][22][23]. The fine grain size and fine oxide dispersion of ODS Mo are also believed to produce high tensile ductility, high fracture toughness, and a low ductile to brittle transition temperature (DBTT) [24][25][26][27]. The mechanical properties and DBTT for molybdenum are sensitive to interstitial purity levels.…”

“…Irradiation of commercially available unalloyed molybdenum or molybdenum alloys at temperatures as high as 600°C generally results in the formation of a high number density (>10 19 /m 3 ) of sessile defects that impede dislocation motion and increase the flow stress of the material above the inherent fracture stress promoting brittle failure [27][28][29][30][31]. Irradiation hardening results in embrittlement that is characterized by a substantial increase in the DBTT that can easily exceed 600°C.…”

Dose dependence of true stress parameters in irradiated bcc, fcc, and hcp metals

“…Ductile metals experience an increase of strength and reduction of ductility after low temperature irradiation, which sometimes results in embrittlement [1][2][3][4][5][6][7][8][9]. In recent studies, the true stress-true strain behavior has been emphasized in the analysis of radiation effects to understand the correlation between microstructural evolution and mechanical properties [10][11][12][13].…”

Some Applications of Electron Back Scattering Diffraction (EBSD) in Materials Research

“…Molybdenum and its alloys are used in a variety of markets, including the electronics, materials processing and aerospace industries. There are a number of different properties that make molybdenum so attractive, notably its strength at high temperature, high stiffness, excellent thermal conductivity and low coefficient of thermal expansion [Cockeram et al, 2005].…”