【摘要】 本研究发现,即使在横截面各处载荷条件完全相同的拉—拉疲劳试验中,金属表层疲劳损伤沿试样厚度方向的分布也是不均匀的,是由外向里逐渐发展的。正是由于这个原因,表面强化对于改善疲劳性能具有特殊的意义。更多还原

【Abstract】 It is found that the distribution of fatigue damage in the metal surface layer is not homogenous along the thick direction, the fatigue grows from the surface to the interior. Due to this reason, the surface hardening (e. g cold work hardening, establishment of surface residual stress field) are especially important for improving the fatigue properties of metals更多还原