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SUMMARY:Mechanics of Hydrogen diffusion and embrittlement - Professor Norm
 an Fleck\, CUED
DTSTART:20180614T140000Z
DTEND:20180614T150000Z
UID:TALK106942@talks.cam.ac.uk
CONTACT:Hilde Hambro
DESCRIPTION:Hydrogen embrittlement results from the diffusion of hydrogen 
 into a metallic alloy\, such as pipeline steels\, and subsequent embrittle
 ment at various trapping sites\, such as grain boundaries. These traps are
  sites of hydrogen embrittlement\, and the degree to which the traps soak 
 up hydrogen depends upon the type of site and the enthalpy of trapping.\n\
 nA large number of material parameters dictate the diffusion process. A no
 n-dimensional analysis has been performed in order to identify the small n
 umber of governing non-dimensional groups and to analyse the two standard 
 tests: hydrogen uptake in the electro-permeation test and hydrogen release
  in the thermal desorption test. Fracture mechanics for hydrogen embrittle
 ment from short cracks has also been developed but many questions still re
 main.
LOCATION:CUED\, LR6
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