Nominal mode I and mixed mode I/II fatigue tests were carried out using the intermetallic compound Ni3Al(CrB) in the form of single crystal specimens. The effects of crystal orientation and load mode on fatigue crack initiation and growth were studied. The fracture surfaces of the single crystals were characterized by a cleavage-like appearance and cracking occurred either on a single {111} plane or on multiple {111} planes irrespective of whether mode I or mixed mode I/II loadings were applied. It was found that the crack initiation and growth behaviour are dependent on both crystal orientation and applied loading mode. The cracking behaviour predicted by three mixed mode fracture criteria (MTS, SED and G criteria) in polycrystalline materials under mixed mode loading can be understood from the present results on single crystals.
部门归属
zhang, gp (reprint author), acad sinica,inst met res,state key lab fatigue & fracture mat,shenyang 110015,peoples r china
G. P. Zhang,Z. G. Wang. Mode I and mixed mode I/II fatigue cracking in Ni3Al(CrB) single crystals[J]. Fatigue & Fracture of Engineering Materials & Structures,1997,20(6):883-894.
APA
G. P. Zhang,&Z. G. Wang.(1997).Mode I and mixed mode I/II fatigue cracking in Ni3Al(CrB) single crystals.Fatigue & Fracture of Engineering Materials & Structures,20(6),883-894.
MLA
G. P. Zhang,et al."Mode I and mixed mode I/II fatigue cracking in Ni3Al(CrB) single crystals".Fatigue & Fracture of Engineering Materials & Structures 20.6(1997):883-894.
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