辐照脆化是指在核技术的设备中，零部件处于高能电子、中子等粒子流的辐射下，结构材料发生脆化，通常表现为几何尺寸变化，体积膨胀，密度变小，强度、硬度上升和塑性下降以及物理性能的变化。
在设备老化机理中，关键问题是中子辐照脆化、腐蚀损伤、疲劳及磨损。
On ageing mechanism of these components, the critical problems are neutron irradiation embrittlement, corrosion damage, fatigue and erosion.
在核压力容器钢的中子辐照脆化评价中，断口剪切面积百分比是一个重要的参数。
Percent shear fracture appearance is an important factor to evaluate neutron irradiation embrittlement of nuclear pressure vessel steel.
分析表明，中子辐照脆化、腐蚀损伤、疲劳及磨损引起核电厂不可更换部件及更换困难部件的老化、降级是制约或极大程度影响电厂寿命的关键问题。
The results show that neutron radiation embrittlement, corrosion damage, fatigue and wear are the key issues which cause aging or degradation of un replaceable or difficultly replaceable components.
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