کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
830074 | 1470350 | 2013 | 8 صفحه PDF | دانلود رایگان |
Flow stress behavior of extruded Al–5.7Zn–1.9Mg–1.5Cu alloy bar was studied by thermal compression test with temperature and strain rate ranging from 300 °C to 450 °C and 0.01 s−1 to 10 s−1 respectively. It was founded that the characteristic of flow stress during 350–450 °C can be described by exponential correlation with activate apparent energy of 152 kJ/mol. With the founded constitutive equation, the die forging processing of a connecting rod in friction screw press was simulated with DEFORM-3D software. The optimum preheat temperature of die forging process are 425 °C for billet, and 200 °C for container. The simulation of the hot forming process shows good agreement with experiments results of geometry and streamline of the workpiece.
► Flow stress of Al–Zn–Mg–Cu alloy is studied by thermal compression.
► The obviously different softening rate above and below 350 °C is considered.
► The flow stress constitutive equation is described by exponential correlation above 350 °C.
► With the equation, the die forging processing of a connecting rod was simulated.
► The forming process parameters were optimized by simulation and validated in practice.
Journal: Materials & Design - Volume 47, May 2013, Pages 465–472