Flexural elastic limit of Zr61Ti2Cu25Al12 amorphous alloy under four-point bending loading mode
The bending test of Zr61Ti2Cu25Al12 amorphous alloy was designed according to the span-thickness ratio recommended in the current metal material bending performance test standard,and the specimen would undergo large deflection elastic deformation.It was proved that the upper limit of the span-to-thickness ratio of the bending specimen without large deflection elastic deformation depended on the elastic strain limit of the material.The elastic strain limit of the zirconium-based amorphous alloy was 2%,and the upper limit of the span-to-thickness ratio without large deflection elastic deformation in the four-point 1/4 bending mode was 22.Under the premise of ensuring small deflection deformation,through the four-point bending cyclic loading and unloading test,the bending yield stress corresponding to the initial shear deformation of the outermost surface of the Zr61Ti2Cu25Al12 alloy sample was about 1 760 MPa,and the bending elastic limit σp0.01 corresponding to 0.01%residual strain was 2 040 MPa.
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