The experiments on notched specimens of an Aluminium alloy indicat that the notch fatigue life can be increased by a tensile over-pre loading but decreased by a compressive over-pre loading.
预过载拉伸可提高铝合金缺口疲劳寿命，但效果不及喷丸； 过载量太大还使寿寿命趋于子下降。
The experiments on notched specimens of an Aluminium alloy indicat that the notch fatigue life can be increased by a tensile over-pre loading but decreased by a compressive over-pre loading.
预过载拉伸可提高铝合金缺口疲劳寿命，但效果不及喷丸； 过载量太大还使寿寿命趋于子下降。
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