Low temperature tensile behavior and constitutive modeling of TC4 titanium alloy
The test studies on the tensile behaviors of TC4 titanium alloy were carried out at 20,10,0,-10,-20,-30 and-40 ℃,and the effect laws of temperature change on the mechanical properties of the material were analyzed.The Johnson-Cook and Modified Zer-illi-Armstrong consititutive models were constructed to predict the dynamic constitutive relationship of TC4 titanium alloy,and the constitu-tive models of TC4 titanium alloy at the plastic stage were introduced into ABAQUS software for tensile finite element simulation analy-sis.The results show that TC4 titanium alloy has a certain sensitivity in the test temperature interval.With the decrease of temperature,the elastic deformation capacity of TC4 titanium alloy changes little,the plastic deformation capacity,tensile strength and yield strength gradually increase,while the maximum elongation increases first and then decreases,and the maximum value is reached at 0 ℃,and the minimum value is reached at-40 ℃.The stress value of the material is the maximum at-40 ℃ and the minimum at 20 ℃ in the plastic stage.The fracture strain value is the maximum at 0 ℃ and the minimum at-40 ℃.It also is found that the Johnson-Cook constitutive prediction results are in good agreement with the test values.The simulation and test have a good agreement in the plastic stage and frac-ture stage,and the error of yield strength tensile strength and elongation is less than 5％.
TC4 titanium alloylow temperature tensileconstitutive modelmechanical propertyfinite element simulation
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