期刊
PHILOSOPHICAL MAGAZINE
卷 92, 期 25-27, 页码 3326-3345出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786435.2012.669068
关键词
microbeam; bond coat; focused ion beam; fracture toughness; finite element modeling
类别
资金
- Defense Research & Development Organization (DRDO), India
A novel method is proposed for fracture toughness determination of graded microstructurally complex (Pt,Ni)Al bond coats using edge-notched doubly clamped beams subjected to bending. Micron-scale beams are machined using the focused ion beam and loaded in bending under a nanoindenter. Failure loads gathered from the pop-ins in the load-displacement curves combined with XFEM analysis are used to calculate K-c at individual zones, free from substrate effects. The testing technique and sources of errors in measurement are described and possible micromechanisms of fracture in such heterogeneous coatings discussed.
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