微观分析表明，疲劳断口上韧窝的增大增深、疲劳源数量增加等是疲劳寿命增加的主要原因。
The main reason for the fatigue life enhancement is correlated with the enlarged dimples and more fatigue sources on the fracture surface.
热处理是一个控制过程，用来改变材料(如金属和合金)的微观结构来传递它们的特性，例如可延长组件的使用寿命。
Heat treatment is a controlled process used to alter the microstructure of materials such as metals and alloys to impart properties which benefit the working life of a component, for example.
齿面经过脉冲电化学光整加工后表面粗糙度低、微观几何形貌平滑，不仅使齿轮寿命大幅度提高而且工作噪音也大幅度降低。
The lower surface roughness and smooth microform by electrochemical finishing not only enhance highly the life of gear, but reduce the noise.
以焊接处微观结构缺陷尺寸作为初始裂纹尺寸，采用基于裂纹闭合的全寿命预测模型，以焊接区域不同位置的长裂纹扩展速率曲线作为基线，利用J。
Fatigue life prediction from the initial crack size to failure based on long crack propagation at different zones of welded joint was made by using j.
用正电子淹没寿命谱方法（PAL S）研究了质子辐照对空间级硅橡胶KH- L - Y微观结构的影响。
The positron annihilation lifetime spectrum(PALS) method was employed to study the effect of proton radiation on microstructure of the space grade KH-L-Y polysilicone rubber.
对微细高速钢麻花钻破坏断口进行了显微观察和测量，根据微小孔钻削实验结果，分析了造成钻头折断的原因和影响其使用寿命的因素。
The fault plane of micro-drill is measured with microscope. According to the result of test, the main elements of destroying drill is investigated.
重点分析研究其微观组织特征，目的是解决亚共晶白口铸铁使用寿命短和脆性大的难题。
The analysis and study laid emphasis on the microstructure characteristic of hypoeutectic white cast iron in order to resolve the difficult problems of low useful life and high brittleness.
管线钢内部的微观组织的组成对材料的使用寿命和性能有着重要的影响。
Composition of Pipeline steel's microstructure has important influence to material service life and performance.
本文讨论了材料退化失效的基本概念，给出了微观结构随机演化的动力学方程，统一导出了失效几率，可靠性、失效几率密度、失效率和平均寿命。
Some key concepts in degradated failure of materials is discussed. The stochastic evolution equation of defect clusters is given and the failure probability reliability and failure rate are derived.
金属基金刚石工具中的金刚石与结合剂之间的界面微观结构对结合剂与金刚石的粘结强度、金刚石的出刃状态以及金刚石工具的使用性能和寿命都有重要的影响。
The interfacial microstructure between diamond and bonds in metal matrix diamond tool play an important role on the bonding of diamond, protrusion status, machining performance and tool life.
研究了纳米晶体铜材料的压制工艺条件对其相对密度和显微硬度的影响，并用正电子湮没寿命谱、扫描电镜和热重分析仪对其微观结构进行了表征。
The influence of relative density and microhardness on pressing parameter of nanocrystalline Cu was studied, and its microstructure was characterized by PAS, SEM and TG.
混凝土表面区域的微观结构与本体材料很不同，因为对材料的使用寿命有很大影响而显得非常重要。
The microstructures of the surface regions of a concrete differ from that of the bulk material, and are important because they have a major effect on durability.
混凝土表面区域的微观结构与本体材料很不同，因为对材料的使用寿命有很大影响而显得非常重要。
The microstructures of the surface regions of a concrete differ from that of the bulk material, and are important because they have a major effect on durability.
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