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SUMMARY:Some aspects of twinning in hcp metals: twin boundary faceting\, m
 igration mechanisms\, interaction with stacking faults - Andriy Ostapovets
 \, Institute of Physics of Materials (IPM)\, Czech Academy of Sciences (CA
 S)\, Brno\, Czech Republic.
DTSTART:20230511T140000Z
DTEND:20230511T150000Z
UID:TALK199045@talks.cam.ac.uk
CONTACT:Julie Smith
DESCRIPTION:Twinning plays an important role in materials with low symmetr
 y\, e.g. hcp metals  (Mg\, Ti and their alloys). Migration of twin boundar
 ies are often accompanied by deformation of material (deformation and tran
 sformation twins). Classical twin boundaries are considered as flat interf
 aces lying along a plane\, which is invariant to twinning shear.  However\
 , in general\, twin is a 3-dimensional object\, which can be bounded by di
 fferent types of interfaces. Some of these interfaces are significantly di
 fferent from symmetrical invariant interfaces.  Present work discusses unu
 sual twin interfaces in hcp metals. The examples of such interfaces are le
 ss common twins (e.g. (1 1 -2 6) twin) and asymmetrical twin boundaries\, 
 which are widely observed during previous years. Connection between twin b
 oundary migration mechanisms and nucleation of asymmetrical facets in twin
  boundaries is considered.
LOCATION:Goldsmiths 2 &amp\; https://us06web.zoom.us/j/81688365420?pwd=b3R
 pdHgxNVhWbWQrbXluMUxYNWVtQT09 Meeting ID: 816 8836 5420 Passcode: 047859
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