其冲击断口微观形貌由室温时的韧窝断口逐渐变为低温下的塑性沿晶断口。
The fracture appearance is dimple at room temperature, it changes into intercrystalline fracture at low-temperature.
结果表明：欠时效态3J 21合金的室温断口为韧窝断口，而低温断口呈现混合断裂特征。
It was found that the room-temperature fracture of the under-aged 3j21 alloy was of a dimple, while the low-temperature fracture assumed a mixed rupture feature.
峰时效态3J 21合金的拉伸断口为韧窝断口，断口附近显微组织中滑移线之间的距离大。
The tensile fracture of 3j21 alloy is a dimple fracture at peak-aged state. The distance between the slip lines is larger in the microstructure near the fracture of the alloy at under-aged state.
合金的断口形貌由韧窝向河流花纹状的解理形貌转变。
The fractures of the alloys change from dimple to cleavage fracture with river pattern.
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.
对叶片断口扫描电镜分析显示，断口具有准解理、韧窝、应力腐蚀等复杂特征。
Scanning electron microscopy analysis on blade fracture shows: the fracture is characterized by cleavage, quasi-cleavage and stress corrosion and so on.
少量铁素体的焊缝凝固裂纹断口上有许多小塑性区，有明显的韧窝。
Some plastic regions could be found and some dimples had been observed on the fracture surfaces of the solidification cracking of austenitic-ferritic weld metals.
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.
很明显，断口中的大韧窝是以WC颗粒为中心的。
The larger dimples are obviously centered around WC particles.
复合材料的拉伸断口假设为韧窝混合断裂。
断口分析表明，随着测试温度的提高，韧窝逐渐变小，呈脆性断裂特征。
The dimples of composites fracture gradually decreases, exhibits brittle fracture, as the testing temperature increases.
随着时效时间的延长，拉伸断口逐渐由韧窝穿晶型向沿晶突脊型及沿晶韧窝型过渡。在固溶状态下，当拉伸应力超过届服强度以后，出现平直滑移带及交叉滑移带；
In the as-quenched condition, straight slip bands and cross slip bands are shown on the surface of specimens after tensile stress has reached the yield stress;
随着时效时间的延长，拉伸断口逐渐由韧窝穿晶型向沿晶突脊型及沿晶韧窝型过渡。在固溶状态下，当拉伸应力超过届服强度以后，出现平直滑移带及交叉滑移带；
In the as-quenched condition, straight slip bands and cross slip bands are shown on the surface of specimens after tensile stress has reached the yield stress;
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