期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2018.02.086
关键词
Nickel base single crystal superalloy; Mechanical twinning; Deformation mechanism; Creep; High temperature
Multiaxial high-temperature creep tests have been performed at 1050 degrees C on a first-generation Ni-based single crystal superalloy through the use of asymmetric notched specimens. Mechanical twins have been observed by EBSD and TEM analyses. A finite element simulation in a crystal plasticity framework has also been carried out to better understand the presence of mechanical twins at stress concentrators depending on stress triaxiality, plastic strain rate, and damage level.
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