Simulation And Experimental Study On The Fracture Properties Of Zr-based Amorphous Alloys

As a new class of structural materials,amorphous alloys have great potential in practical applications.They always demonstrate more plastic deformation under complex stress conditions,exhibiting better mechanical properties.In this work,some single-side-notched amorphous alloy samples with different notch radii and geometries were designed and prepared and tested under tensile stress.The absorption of plastic energy of the notched samples were also calculated and analyzed.The calculation results have shown that the notched amorphous alloy samples can release more plastic energy than the conventional amorphous alloy samples before fracture.In contrast,the conventional amorphous alloys have uniform stress states,while the amorphous alloys with notches are under complex stress states.Therefore,in order to accumulate more plastic energy,a more concentrated stress state and a more rational distribution of complex stress state are needed.In order to investigate the effect of different complex stress states on the notched amorphous alloy samples,the different thermal loading types and analyses of the amorphous alloy samples with notches were carried out.The simulation results show that the residual stress of the amorphous sample with external heat source changes the complex stress state of the notched sample,and the maximum cell strain energy of the sample changes obviously with different thermal loadings.The results indicate that the external heat sources on the amorphous alloy samples will cause the formation of new complex stress fields,which will change the properties of structural materials.Further simulation study on thermal stress loading mode shows that less residual stress distribution near the notch will lead to higher energy absorption capacity.In this paper,the correlations among the design parameters were also simulated and analyzed.The simulation results show that the distribution of output parameters is different when the input parameters satisfy certain distribution conditions.The simulation results show that the variation of the structural parameters at a small range will not lead to large fluctuations on the strain energy.The variation of the properties,caused by a small range variation of structural parameters,is consistent with our previous research findings.