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 °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.

中文翻译：

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取向错误对镍基单晶高温合金DD5 980℃疲劳寿命的影响

镍基单晶（NBSX）高温合金的取向错误在目前的研究中一直被忽视，实际上这对NBSXs的疲劳寿命有一定的影响。为了研究这种影响，在 980 °C 下进行了不同取向角的 NBSX 高温合金 DD5 的疲劳试验，并基于断口观察和晶体塑性有限元 (CPFE) 分析研究了失效机制。实际定向错误对 NBSX 疲劳寿命的影响已被量化，这也是首次报道。