Mixed Mode Crack Propagation of Zirconia/Nickel Functionally Graded Materials
محل انتشار: ماهنامه بین المللی مهندسی، دوره: 26، شماره: 8
سال انتشار: 1392
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 664
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شناسه ملی سند علمی:
JR_IJE-26-8_001
تاریخ نمایه سازی: 17 خرداد 1393
چکیده مقاله:
Zirconia-nickel functionally graded materials were obtained by powder metallurgy technique. The microstructure, residual stress, fracture toughness and Vickers hardness were investigated. Mixedmodefracture response of YSZ /Ni functionally graded materials was examined utilizing the threepoint bending test and finite element method (Cosmos/M 2.7). The results show that the stress intensity factors (KI, KII) for the FGM are less than those for non-graded composite (NGCs) under mixed mode loading conditions. There are some local perturbations in the crack propagation paths of the FGM andNGC specimens. Most of local perturbations exhibit in the layers with high Ni content such as the layers with 30%, 40% and 50% Ni, respectively. The local perturbations are believed to be caused by the local heterogeneity of the microstructure. The residual stress (maximum tensile stress) of the NGC (YSZ/50%Ni) was 122 MPa and was in agreement with the published paper
کلیدواژه ها:
Functionally Graded Materials (FGM) ، Powder Metallurgy Technique ، Mixed Mode Fracture ، Finite Element Method ، Non-graded Composite (NGCS) ، Maximum Principle Stress (MPS)
نویسندگان
a.r EL-Desouky
Department of Production Engineering and Mechanical Design, Faculty of Engineering, Menoufiya University, Shebin El-Kom, Egypt
M. S. EL-Wazery
Department of Production Engineering and Mechanical Design, Faculty of Engineering, Menoufiya University, Shebin El-Kom, Egypt