Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 13 No. 4 August 2003|
by thermo-mechanical treatment
（State Key Laboratory of Metal Matrix Composites,
Shanghai Jiaotong University, Shanghai 200030, China）
Abstract:Tension-compression fatigue test was performed to study the effect of the cold working + ageing treatment on the fatigue property of Al-Li alloy under stress-controlled condition. The main results show that: fatigue strength of specimen is improved obviously after cold working + ageing treatment; compared to the simple ageing treatment, the necessary ageing time can be reduced apparently to reach the peak-ageing strengthening effect; the fatigue strength of specimen cut from the vertical direction to cold working direction is higher than that cut from the parallel direction.
Key words: Al-Li alloy; thermo-mechanical treatment; fatigue property