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DTSTART:19700329T020000
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UID:ude20260226140000
CLASS:PUBLIC
SUMMARY:Materials Chain Invitation Talk Lin Tian
DTSTART;TZID=Europe/Berlin:20260226T140000
DTEND;TZID=Europe/Berlin:20260226T000000
DTSTAMP:20260226T140000Z
LOCATION;ENCODING=QUOTED-PRINTABLE:Campus Außerhalb : Ruhr University Bochum Seminar room 03-121 of the ZGH building
CONTACT:Herr Christoph Flethmann ()
DESCRIPTION:Herr Christoph Flethmann ()
Materials Chain Invitation Talk Lin Tian
Abstract:

In situ straining techniques in transmission electron microscopy (TEM) have been widely used to enable dynamic, defect-level investigations of material deformation. Various in situ mechanical testing methods have been developed to probe deformation and fracture processes under controlled environments.
As a case study, this talk presents an in situ fracture testing method implemented in an environmental transmission electron microscope (ETEM) to investigate hydrogen embrittlement. The fracture behavior of a Cr–Mo low-alloy steel tested under vacuum and hydrogen gas environments is compared. The results show that the specimen tested in vacuum underwent significant plastic deformation and failed via void nucleation and coalescence. In contrast, the specimen tested in hydrogen gas exhibited zigzag crack propagation, which is considered a characteristic feature of hydrogen embrittlement. 

Thursday, 26. February 2026
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