Use of Brazilian disk test to determine properties of metallic-intermetallic laminate composites

Tensile and flexural properties of multilayered metal/intermetallics composites

“…Our analysis agrees well with the observation in Fig. 5a and the results by Jiang et al [16], where most of micro-cracks located around the main crack. Fig.…”

“…5a, micro-cracks of the sample subjected to the tensile loading merely generated along the main crack and distributed at the right side of the dotted line as marked. The phenomenon is similar to the result by Jiang et al [16] who made an investigation on the tensile properties of Ti/TiAl 3 laminated composites. However, for the sample subjected to the bending loading (Fig.…”

“…Vecchio et al [14] and Li et al [15] have made a great effort to investigate the mechanical properties of the multilayered Ti/TiAl 3 composites which may be used as armor layers in tank or other military vehicles due to their outstanding toughness and ballistic properties. In tension [16], compression [15], bending/R-curve [14], and ballistic [17,18] tests, one common trait observed for this multilayered composites was the failure initiated in the intermetallic layers. Nonetheless, the occurrence of crack bridging, crack deflection, stress redistribution, and crack front blunting could effectively tough the multilayered Ti-TiAl 3 composites, which resulted in an excellent combination of specific strength, toughness and stiffness for structural applications.…”

Fracture toughness of Ceramic-Fiber-Reinforced Metallic-Intermetallic-Laminate (CFR-MIL) composites

“…Each method has its own set of processing characteristics for synthesizing different laminate composites. A number of brittle intermetallics-ductile metal laminates, such as Ti-Al [3,[5][6][7][8][9][10][11][12][13][14][15], Ni-Al [3][4][5][6], Nb-Al [16] and Ti-Cu [17] composite systems have been produced using these processing techniques. It was demonstrated [8,9] that the Ti-Al 3 Ti Metal-Intermetallic-Laminate (MIL) composites are among the most promising owing to the unique properties of these materials.…”

“…The crack propagation and damage evaluation of Ti-Al 3 Ti, as a function of the volume fraction of Ti, loading direction, strain and strain-rate, were also investigated experimentally in our previous work [14]. In our recent work [15], tensile mechanical properties of the Ti64-MIL composite with a volume fraction of ~23%Ti were investigated, and both in-plane and through-thickness tensile strengths of this MIL composite were measured using the compressively-load Brazilian test. The systematic studies of the Ti-Al 3 Ti MIL composites demonstrated that these composites have unique mechanical properties, such as high stiffness, high modulus and low density [9], however, depending on the volume fraction of the remnant Ti, the fracture toughness is in the range of 10-50 MPam [10][11][12].…”