Non-destructive studies on tensile and fracture properties of molybdenum at low temperatures (148 to 423 K)

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Tensile and fracture properties of molybdenum have been studied using the automated ball indentation technique. Tests have been carried out at several temperatures in the range of 148 to 423 K at a constant strain rate. Tensile properties determined from these tests agreed well with published results from conventional tensile tests. Temperature dependence of indentation energy to fracture, the fracture toughness parameter specific to this technique using critical stress-to-fracture concept, showed a sharp transition from brittle to ductile condition. These results complement the previous studies on pressure vessel steels, and clearly demonstrate that automated ball indentation technique is a reliable and non-destructive method for determining tensile and fracture properties of materials.

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