Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 153, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2021.106479
Keywords
Nickel base single crystal; Misorientation; Fatigue life; Crystal plasticity
Funding
- National Science and Technology Major Project [2017-VI-00030073]
- National Natural Science Foundation of China [52075244, 11632010, 52002181]
- Shuimu Tsinghua Scholar Program of Tsinghua University [2019SM065]
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The study reveals that the misorientation of nickel-base single crystal superalloy can affect its fatigue life, and the actual misorientation angle's impact on fatigue life has been quantified for the first time.
The misorientation of nickel-base single crystal (NBSX) superalloy is always ignored in the current research, which in fact has a certain influence on the fatigue life of NBSXs. To investigate this influence, the fatigue tests of NBSX superalloy DD5 with different misorientation angles have been carried out at 980 degrees C, and the failure mechanism has been investigated based on the fractographic observation and crystal plastic finite element (CPFE) analysis. The effect of real misorientation on the fatigue life of NBSX has been quantified, which is also reported for the first time.
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