hardening effect

Pre twisted tungsten projectile is soft inside and hard outside because of long rod's work hardening effect.

预扭转钨弹由于其长杆的加工硬化效应，具有外硬内软、外脆内韧的特性。

The experimental results proved that ( 1) there is an additional cyclic strain hardening effect caused by non-proportional loading, and ( 2) the relative orientation between maximum shear plane and free surface plays significant role on fatigue life.

非比例加载引起的附加循环硬化；（2）最大剪切平面与自由表面相对取向对疲劳寿命的影响；

The results showed that the hardening effect is better by treated with 0.3% sodium sulfite for 5 h.

实验结果表明：采用0.3%的亚硫酸钙处理5h后硬化效果较好；

Austeinitic FeCr 18.2 Ni 6.9 Mo 205 C 1.5 alloy can produce an obvious age hardening effect.

奥氏体FeCr18.2Ni6.9Mo2.5C1.5合金时效时可产生明显的二次硬化效果.