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VERSION:2.0
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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260810T211118Z
UID:https://www.mpie.de/events/46464/3428329
DTSTART:20260812T113000Z
DTEND:20260812T123000Z
CLASS:PUBLIC
CREATED:20260810T065951Z
DESCRIPTION:High-pressure torsion (HPT) generates ultrafine-grained (UFG) m
 icrostructures with high densities of deformation-induced defects\, result
 ing in enhanced mechanical properties but limited thermal stability.In thi
 s study CuSn5\, CuZn5\, and CuZn30 alloys subjected to HPT and subsequent 
 short-time annealing were investigated. ACOM and EDX were used to correlat
 e the grain boundary type with the local distributions of Sn and Zn. The a
 lloys exhibited composition dependent segregation behavior\, leading to di
 fferent degrees of grain boundary stabilization. In CuSn5\, Sn segregation
  occurred at high angle grain boundaries (HAGBs)\, resulting in stabilizat
 ion of the microstructure up to 200°C. In CuZn5\, the segregation of Zn w
 as deformation-driven\, and also stabilized the UFG microstructure\, i.e. 
 no grain growth after annealing at 200°C. In the case of CuZn30\, the seg
 regation mechanism was reversed and Zn was depleted from the HAGBs. Anneal
 ing for several hours resulted in a homogeneous distribution of the alloyi
 ng elements. These results demonstrate that solute segregation is not only
  thermally driven but can also be influenced by mechanical deformation. Ov
 erall\, the segregation of Sn and Zn can enhance the thermal stability of 
 defect rich UFG-Cu alloys.\nSpeaker: Yuting Dai
LAST-MODIFIED:20260810T071212Z
LOCATION:Max Planck Institute for Sustainable Materials\, Room: Large Confe
 rence Room No. 203
ORGANIZER;CN=on invitation of Prof. Gerhard Dehm:mailto:
SUMMARY:Microstructural Evolution and Mechanical Properties of Cu-X (X = Sn
 \, Zn) Alloys Processed by High-Pressure Torsion Followed by Short-Time An
 nealing
URL;VALUE=URI:https://www.mpie.de/events/46464/3428329
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