Mechanical Properties of Y2O3-doped W-Ti Alloys Articles uri icon

publication date

  • September 2010

start page

  • 203

end page

  • 209

issue

  • 3

volume

  • 404

international standard serial number (ISSN)

  • 0022-3115

electronic international standard serial number (EISSN)

  • 1873-4820

abstract

  • W and W alloys are currently considered promising candidates for plasma facing components in future fusion reactors but most of the information on their mechanical properties at elevated temperature was obtained in the 1960s and 1970s. In this investigation, the strength and toughness of novel Y2O3-doped W-Ti alloys manufactured by powder metallurgy were measured from 25 ºC up to 1000 ºC in laboratory air and the corresponding deformation and failure micromechanisms were ascertained from analyses of the fracture surfaces. Although the materials were fairly brittle at ambient temperature, the strength and toughness increased with temperature and Ti content up to 600 ºC. Beyond this temperature, oxidation impaired the mechanical properties but the presence of Y2O3 enhanced the strength and toughness retention up to 800 ºC.