The results shows that the smooth and notchfatigue strength of the meta-bainite consisting of bainite ferrite and retained austenite is higher than that of martensite.
与马氏体组织相比，由贝氏体铁素体和残余奥氏体组成的准贝氏体组织，其光滑及缺口疲劳强度均较高。
2
The experiments on notched specimens of an Aluminium alloy indicat that the notchfatigue 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。
3
Compared with the forging die steel, casting forging die steel although toughness is low, but high strength, red hardness is good, with low notch sensitivity and high resistance to thermal fatigue.