The effect of crystallographic orientation on solid metal induced embrittlement of Ti-6Al-1Mo-1V in contact with copper
Paper i proceeding, 2013
Solid metal induced embrittlement (SMIE) occurs when a metal experiences tensile
stress and is in contact with another metal with lower melting temperature. SMIE is believed to
be a combined action of surface self-diffusion of the embrittling species to the crack tip and
adsorption of the embrittling species at the crack tip, which weakens the crack tip region. In the
present study, both SMIE of the near alpha alloy Ti-8Al-1Mo-1V in contact with copper and its
influence by crystallographic orientation have been studied. U-bend specimens coated with
copper were heat treated at 480°C for 8 hours. One of the cracks was examined in detail using
electron backscatter diffraction technique. A preferable crack path was found along high angle
grain boundaries with grains oriented close to [0001] in the crack direction; this indicates that
there is a connection between the SMIE crack characteristics and the crystallographic
orientation.
EBSD
titan
crystallographic orientation
metal induced embrittlement (MIE)