A series of true stress via true strain curves were mapped under given temperatures

including 250

300

350

400

450

500 ℃

and strain rate

including 0.1

0.01.0.001 s-1

based on the measurements of mechanical properties of squeezing casting aluminum alloy with different pressures

such as 20

50

75 MPa by means of digital-controlled thermal-mechanical physical analogue machine Gleeble-1500D.The effects of temperature

strain rate and squeezing pressure on the mechanical properties of the aluminum alloy at elevated temperature have been examined.The results indicate that the flow stress of the aluminum alloy is decreased with the increase of the temperature and is increased with the increase of the strain rate.The higher flow stress can be obtained with a higher squeezing pressure

exhibiting the effects of squeezing pressure on the mechanical properties of the aluminum alloy at elevated temperature.