Cryogenic strength, ductility and toughness of 8090 Al-Li alloy were found to be superior to those at ambient temperature, and up to optima at about 20 K.

• 本文研究了极低温度下8090Al-Li合金的力学性能,发现它在极低温度下的强度、延性和韧性均优于室温下的性能,且均在20K左右达到最大值;