热疲劳断口具有穿晶解理特征。
此外，对疲劳断口进行了分析对比。
Besides, This paper also analyzes and compares the fatigue fractures.
归纳总结了叶片疲劳断口的特征形貌。
The fatigue fracture surface features of blade are summarized firstly.
通过理化试验，得出凸轮轴断口属扭转疲劳断口。
Through physical and chemical experiments, it is obtained that the break of the CAM shaft is a torsional fatigue break.
利用SEM观察疲劳断口和TEM观察位错形貌。
The fractograph and dislocation were observed with SEM and TEM.
利用SEM观察疲劳断口和TEM观察位错形貌。
The fractograph and dislocation morphology were observed by means of SEM and TEM.
还介绍了发生过载损伤后高温低循环疲劳断口的特征。
In addition the features of high temperature low cycle fatigue fracture surfaces are given.
对840d车轮辐板孔疲劳断口形貌进行观察并测量疲劳弧线间距。
The fracture surfaces of 840d wheel web with a hole have been investigated and the intervals of fatigue line also have been measured.
断口分析表明，合金低周疲劳断口的主要特征是平行的条纹及韧窝。
The chief character of fracture is fatigue striation and dimple.
由此可以断定油管断口属疲劳断口，油管的断裂失效性质是疲劳断裂。
Therefore it can be judged that the fractures in the tubing are fatigue fractures and the tubing failure is caused by fatigue fracture.
扫描电镜分析结果显示添加稀土的镁合金疲劳断口呈现出准解理断裂特征。
The results by SEM results show that AZ91D alloy by addition rare earth elements possess the features of quasi-cleavage fracture.
本文对淬火加回火渗碳钢的拉伸一拉伸疲劳断口进行了内裂纹的分析和研究。
Internal fatigue cracks occurred in the fracture of a quenched and tempered carburized steel specimen under tension-tension fatigue loads are discussed in this paper.
该系统可实现疲劳断口条纹尺寸测定、区域面积积分、裂纹角度测量等功能。
By using this system, a series of functions for measuring the size of the fatigue section, integrating the area of region and determining the Angle of the crack can be completed.
疲劳断口上存在典型的疲劳裂纹萌生区、缓慢扩展区、快速扩展区和最后瞬断区。
The fatigue fractography consists of several different zones, including fatigue crack initiation, slow, fast propagation and final fracture.
疲劳试验发现，疲劳试样断裂位置多发生在焊缝处，并对疲劳断口进行了SEM分析。
Fatigue beaked on weld seam more than other places. Fatigue crack initiation occurred inside materials and fatigue fracture was analyzed by SEM.
本文还在疲劳断口的研究方面进行了新的尝试，探讨了二次裂纹对疲劳裂纹扩展的影响。
We also make tentative researches for fatigue fracture and for the effect of secondary crack on fatigue crack growth.
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.
疲劳断口有应力发白现象；应力发白区为疲劳裂纹形核和萌生区，其寿命占疲劳总寿命的大部分；
The stress whitening can be clearly seen on the fatigue fracture surface and its region is the initiation and nucleation of fatigue crack which is the main part of total fatigue life.
通过疲劳断口的电镜扫描试验，证明防爆膜的疲劳破坏是由存在于金属内部的微裂纹和杂质所引起。
The photographs of the sweep electron microscope show that fatigue damage are caused mainly by microcracks and impurities of metal.
研究了稀土元素对AZ 91 D压铸镁合金高周疲劳性能的影响，并对疲劳断口的组织形貌进行了分析。
Influence of rare earth elements on high-cycle fatigue properties of AZ91D alloy was investigated and the fatigue fracture morphology was also analyzed.
本文用宏观和微观方法测量了几种高强度钢的疲劳裂纹扩展速率，用金相和断口复型法观察了疲劳断口的微观形态以及与显微组织的关系。
The studies were carried out of the test of fatigue crack growth rate and relative to the microscopic morphology of fracture surface in certain high-strength steels.
论述了表面疲劳裂纹检测在汽车修理中的重要地位，简单分析了疲劳断口的特征，重点讨论了汽车零件表面疲劳裂纹的发生规律及其常见部位。
The importance of examination of surface fatigue cracks in automobile repair is stated in this paper, and the features of fatigue fracture are briefly analysed.
对45碳钢氮碳共渗处理疲劳断裂后的断口附近的显微硬度，组织特征进行了分析。
The microhardness, microstructure characteristics of the nitrocarburized 45 carbon steel after fatigue fracture were studied.
较高的疲劳性能与裂纹尖端闭合应力、断口表面粗糙度以及裂纹扩展路径弯折程度有关。
The high fatigue properties were found to be related with higher crack closure stress, rough fracture surface and tortuousity of crack path.
本文论述应用电子显微断口分析法对疲劳断面进行定量分析。
The application of electron fractography to the quantitative analysis of fatigue fracture surfaces is discussed in this paper.
踏面斜裂纹及断口的宏观形貌和理化检验与分析表明，踏面斜裂纹伤损属于滚动接触疲劳裂纹伤损类型。
The macro profile and physicochemical examination of the tread oblique crack shows that the crack falls into the category of rolling contact fatigue type.
利用扫描电镜对多轴比例和非比例加载下的薄壁管多轴疲劳试样的断口表面进行扫描观测分析。
The fatigue fracture surfaces of multiaxial fatigue specimens subjected to proportional and non-proportional multiaxial loadings were observed and analyzed by using the scan electron microscope.
采用扫描电镜进行断口分析，结果表明，零件内弯处外表面上的冲压伤痕是导致其早期疲劳断裂的主要原因。
The fracture surface was inspected by SEM. The results showed that the stamping damage on the surface around the inside bend was the main factor to cause the early fracture.
利用扫描电镜对试样断口进行了观察和分析，并对疲劳寿命提高机制进行了讨论。
The fractographs of specimen are analyzed by SEM, and the mechanism of fatigue life improvement is discussed.
利用扫描电镜对失效压铸模具热疲劳裂纹的宏观、微观、断口形貌进行了分析。
The macro-morphology, micro-morphology and fracture morphlogy of failure die casting dies were analyzed.
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