铸件冷却收缩时，小的裂纹源进一步扩展形成裂纹缺陷。
On cooling and contraction, the small cracks further expand into hot tearing defect.
微孔在应变应力作用下扩展，贯通，形成裂纹，穿过铁素体。
With increasing stress, small holes are created, gather, grow and finally become a crack that crossed ferrite grain.
使钢产生热脆性，降低钢的延展性和韧性，在锻造和轧制时形成裂纹。
Causes the steel to produce the hot brittleness, reduces the steel the ductility and the toughness, when forging and rolling crack.
指出铸锭中的冷隔形成的表层横向冷裂纹是最终形成裂纹缺陷的根本原因。
It was considered that transverse cold cracking on surface due to cold shuts in ingots was the root cause of the crack defects.
破断面观察结果显示，在室温中，氢气会导致平滑试片在表面形成裂纹，而在凹槽试片中产生劈裂破坏形态。
Fractographic observations showed that hydrogen could induce surface cracks for smooth specimens and a cleavage fracture pattern for notch specimens at RT.
结果表明：轮箍裂纹是由于钢锭中存在严重的皮下气泡，在轮箍热加工过程中皮下气泡处金属被氧化烧穿导致不能粘合而形成裂纹。
The result showed that the crack forming was due to the billet metal in the subcutaneous blow holes were oxidated during heating process and could not be sticked.
这些问题在和平进程中形成一条明显的裂纹。
These issues have created a stark fault line within the Peace Process.
轴承零件在淬火冷却过程中因内应力所形成的裂纹称淬火裂纹。
Bearing parts in the process of hardening cooling by internal stress due to the formation of quenching cracks crack said.
疲劳裂纹的形成是该阶段最重要的特征。
The formation of fatigue cracks became the most important features in this stage.
根据不同电流等级及不同触头闭合压力，对银基触头材料裂纹类型及形成机理进行了分析研究。
The study on crack types and their formation mechanisms of silver based contact materials are carried out according to the various currents and various contact closed forces.
晶粒尺寸对形成寿命、扩展寿命和裂纹长度的分布特性都有影响。
The initiation life, growth life and crack length distributions are affected by the grain size.
本文用空间解析几何方法，推导了在一般非平行斜入射光条件下，裂纹体表面所形成的反射焦散线和初始曲线的方程。
The equations of caustic curve and its initial curve for a crack illuminated by an oblique incident light beam in reflection arrangement were deduced using the space analytic geometry method.
热开裂指在液态下产生裂缝，而冷开裂是在固态条件下，一般在环境温度下形成的裂纹。
Hot cracks refer to the liquid condition, whereas cold cracks are generated in the solid condition, generally at ambient temperature.
淬火裂纹：裂纹在钢材的淬火或淬火后形成，由于冷却时的高应力所造成；也有可能是在淬火油中的水所导致。
Quench Cracks: Cracks formed in a steel part during or after quench, resulting from high stresses in cooling; could be caused by water in the quench oil.
裂纹形成的断裂为穿晶解理机制，预应变可导致更多的二次裂纹。
The fractography of the fatigue crack initiation displayed cleavage facet and more second cracks after pre-training.
压圈原材料中心疏松及锭型偏析是导致裂纹形成的主要原因。
The results showed that central porosity and ingot shape segregate were the major causes of the cracking.
还会形成穿透型裂纹，造成镀层下本体金属的疲劳或应力腐蚀裂纹。
Through-thickness cracking also can lead to fatigue or stress corrosion cracking of the base metal beneath the plating.
本文对解理台阶的形成模型——解理裂纹与螺位错交割模型进行了诠释。
Its explicitly explained how the cleavage step pattern is formed by the cleavage crack intersecting with screw dislocation.
结果表明，失效形貌呈典型的接触疲劳特征，两种疲劳裂纹形成模式同时存在。
The results showed that failure morphology was of typical contact fatigue characteristics, and two modes of fatigue crack formation worked.
高温蠕变损伤是由于过热引起的，过热使金相组织内部产生蠕变空洞，在热应力下空洞扩展连接而形成蠕变裂纹。
Creep damage is mainly caused by superheat. Because of superheat, creep cavities are formed inside microstructure, under heat stress condition, growth and join of cavities induce creep cracking.
本文主要论述了动荷载作用下岩石等脆性材料的断裂破坏机理、裂纹形成与扩展以及裂纹的止裂与控制等内容。
Fracture mechanism, initiation and propagation of cracks, and the control method of cracks in rock like brittle material under dynamic load are described in this paper.
最后，在钢基体相中形成的裂纹以“搭桥”方式将其前后的裂纹连接起来。
At last the crack that it has formed in the steel based phase connects back and forth cracks of it by bridging.
结果表明：原始的萌生裂纹不一定是最后形成宏观贯通破坏的主裂纹。
Numerical simulation results show that initial cracks are not always the leading cracks which result in the ultimate macroscopical perforation failure.
利用MATLAB生成几组随机数来模拟参考裂纹尺寸和应力水平不同时的裂纹形成时间(TTCI)值，并以此检验了理论推导的正确性和合理性。
Finally, several groups of random Numbers were produced with MATLAB to simulate TTCI values when cracks propagated, with which correctness and rationality of theoretical deduction were verified.
本文分析了飞机前襟翼作动筒连接螺栓底座表面裂纹的形成原因。
The cause of the surface cracks of a bolt bed was analyzed in this paper.
实验还观察到砂岩表面微缺陷发生闭合的全过程，在冷却过程也有微裂纹形成等现象。
Also a closing course of initial crack and thermal cracking coming into being in the cooling process are observed in our experiment.
对双金属带锯条表面裂纹的形成原因进行了分析。
The surface cracks of the bimetal strip sawblade was investigated in the paper.
对双金属带锯条表面裂纹的形成原因进行了分析。
The surface cracks of the bimetal strip sawblade was investigated in the paper.
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