Bending strength of an AlAl3Ni functionally graded material

摘要: Abstract The gradient of bending strength an Al-Al3Ni functionally graded material (FGM) has been examined using 3-point tests. Specimens with rectangular cross-sections 6 × mm2 were machined from a thick-walled FGM tube such that the thickness direction specimen coincided radial tube. Thus specimens had composition A13Ni phase in direction. Four types characterized by four nominal volume fractions Al3Ni at crack initiation plane, namely Vf= 0, 24, 49 and 53 vol%, employed study. Fracture surfaces consisted cleavage facets surrounded dimples aluminum phase. Brittle fracture dominated process FGM. strengths plotted on standard normal Weibull probability paper. trends each data set exhibited good linearity, making it difficult to determine differences fit between two kinds papers. Maximum average stress 156 MPa was obtained 24 vol% specimen, decreased following order type: 49, 0 vol%. attained maximum value 160 Vf≈10 increase fraction due size effect controls brittle