Using cold-working processes such as wire drawing, the ductile-to-brittle transition temperature T
DBT of tungsten can be lowered. Sufficiently worked wires can show ductility at ambient temperature. To understand the shift of T
DBT, a series of drawn tungsten wires including all drawing stages from the hammered rod to very thin wires was investigated using complementary microstructural analysis methods and mechanical tests. The results indicate that the shift of T
DBT is a consequence of the wires’ special microstructure and the distribution and the properties of dislocations.
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Using cold-working processes such as wire drawing, the ductile-to-brittle transition temperature T
DBT of tungsten can be lowered. Sufficiently worked wires can show ductility at ambient temperature. To understand the shift of T
DBT, a series of drawn tungsten wires including all drawing stages from the hammered rod to very thin wires was investigated using complementary microstructural analysis methods and mechanical tests. The results indicate that the shift of T
DBT is a consequence of the wires...
»