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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 4    August 2003

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Improving fatigue property of Al-Li alloy
by thermo-mechanical treatment
DING Jian(丁 剑), ZHANG Di(张 荻), FAN Tong-xiang(范同祥),
LV Wei-jie(吕维洁), QIN Ji-ning(覃继宁)

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

ISSN 1672-7029
CN 43-1423/U

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