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应力腐蚀裂缝
相关语句
  stress corrosion cracks
     ELECTROCHEMICAL BEHAVIOURS INSIDE STRESS CORROSION CRACKS OF 1Cr13 STAINLESS STEEL
     1Cr13不锈钢应力腐蚀裂缝内的电化学机制研究
短句来源
     Specimens stressed at yieiding point in acidic occluded solutions were tested to simulate the mechanical and environmental states within stress corrosion cracks for "1Cr13 steel /0.5mol/L Cl-" system, and to determine the corrosion rates as well as the electrochemical behaviour of crack tips at different propagating stages.
     模拟1Cr13不锈钢在0.5mol/L NaCl溶液中应力腐蚀裂缝尖端的环境变化和受力状态,进行腐蚀及电化学测试,绘制了描述该体系应力腐蚀裂缝内各阶段热力学和动力学行为的实验电位~pH图.
短句来源
     Progresses and Problems in the Research of Electrochemical Behaviors Within Stress Corrosion Cracks
     应力腐蚀裂缝内电化学行为的研究进展情况和存在的问题
短句来源
     The methods for the research on the electrochemical behaviors within stress corrosion cracks are reviewed, which consisted of pratical and modeled measurements and theoretical alalysis.
     应力腐蚀裂缝内电化学行为的研究方法分为实际测量、模拟测试和理论计算三种。
短句来源
  “应力腐蚀裂缝”译为未确定词的双语例句
     Accelerating Effect and Critical pH value of Occluded cell Corrosion within pits crevices or S.C.Cracks
     在蚀孔、缝隙或应力腐蚀裂缝中的闭塞电池腐蚀的加速效应和临界pH值
短句来源
     Simulated occluded solutions were used to study the accelerating effect within pits, crevices or S.C. cracks for the system of 18—8 steel in Cl~solution.
     利用模拟闭塞区溶液研究了18—8不锈钢在Cl~-溶液中蚀孔、缝隙或应力腐蚀裂缝内的加速腐蚀效应。
短句来源
     There is a critical strength level, below which no SCC is observed.
     强度低于临界值,则不出现应力腐蚀裂缝
短句来源
     The potential/pH diagrams interpreted the thermody- namic as well as kinetic behaviour inside stressed cracks.
     放氢平衡线和免蚀线. 以及闭塞区腐蚀和放氢动力学曲线等叠加绘制而成的实验电位一pH图,能解释应力腐蚀裂缝内的热力学和动力学行为。
短句来源
     The experimental potential / pH diagrams depicting kinetic and thermodynamic behaviours inside cracks as well as mechanical and environmental effects on occluded cell corrosion were constructed.
     腐蚀率~pH曲线、电位~时间曲线和电位~pH图等均表明上述体系应力腐蚀裂缝内存在1个临界pH值(90℃时约为4.1).
短句来源
  相似匹配句对
     Stress Corrosion of Titanium Alloy
     钛合金的应力腐蚀
短句来源
     CRANKS CRACKING CAUSED BY STRESS CORROSION
     曲臂应力腐蚀开裂
     Corrosion
     腐蚀
短句来源
     EFEFCTS OF STRESS ON THE CORROSION BEHAVIOUR OF OCCLUDED CELL INSIDE S.C.CRACKS
     应力腐蚀裂缝内闭塞区腐蚀行为的影响
短句来源
     There is a critical strength level, below which no SCC is observed.
     强度低于临界值,则不出现应力腐蚀裂缝
短句来源
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  stress corrosion cracks
At 48?h of aging, the specimen failed by SCC and the corrosion current pulses had high intensity and low frequency, and were associated with the nucleation and propagation of stress corrosion cracks during slow strain rate tests.
      
In all components, unpeened sections developed stress corrosion cracks within a few hours in the magnesium chloride test; in contrast, the shot peened surfaces survived hundreds of hours.
      
Bonded composite reinforcements, such as boron/epoxy or carbon/epoxy, are becoming widely used to repair fatigue or stress corrosion cracks in aluminium alloy aircraft components.
      
These stress field equations are employed in analyzing a dissolution model for the arrest of stress corrosion cracking by crack tip blunting, which is often observed with the arrest of stress corrosion cracks.
      
The phenomena of branching and blunting of stress corrosion cracks are reviewed and their effects demonstrated for a martensitic steel.
      
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The methods for the research on the electrochemical behaviors within stress corrosion cracks are reviewed, which consisted of pratical and modeled measurements and theoretical alalysis.Three important but unclear problems are also presented, these are processes of electrochemical kinetics at cracktips, the distributions of current and inpedence within cracks and the influence of polarization on the electrochemistry of crack tips.

应力腐蚀裂缝内电化学行为的研究方法分为实际测量、模拟测试和理论计算三种。本文简略地介绍和评述了各种研究方法的进展情况及优缺点。存在的主要问题是:裂尖的电化学动力学过程、裂缝内电流及阻抗的分布规律、外部极化对裂尖电化学状态的影响等尚不清楚。

Simulated occluded solutions were used to study the accelerating effect within pits, crevices or S.C.cracks for the system of 18—8 steel in Cl~solution.A critical pH=1.3 ([Cl~-]=1.5M) was found from whence the corrosion rate started to accelerate rapidly as pH continued to decrease. The rise of external potential above critical potential is only necessary at the initial stage to cause pH fall and Cl~- increase in the pits or cracks, but after occluded pH dropped below the critical point the action of internal...

Simulated occluded solutions were used to study the accelerating effect within pits, crevices or S.C.cracks for the system of 18—8 steel in Cl~solution.A critical pH=1.3 ([Cl~-]=1.5M) was found from whence the corrosion rate started to accelerate rapidly as pH continued to decrease. The rise of external potential above critical potential is only necessary at the initial stage to cause pH fall and Cl~- increase in the pits or cracks, but after occluded pH dropped below the critical point the action of internal HCl acidic cell will predominate during propagation of the cracks or pits, so to cause hydrogen embrittlement ahead of crack tip.

利用模拟闭塞区溶液研究了18—8不锈钢在Cl~-溶液中蚀孔、缝隙或应力腐蚀裂缝内的加速腐蚀效应。发现一个临界pH值,pH≌1.3([Cl~-]≌1.5M),当pH降至低于临界值以下时腐蚀率加速上升。在裂缝或蚀孔的引发阶段,外部电位需要超过临界破裂电位,以引起蚀孔或缝隙内的pH下降和Cl~-浓集。但当闭塞区pH下降到临界值以下后,腐蚀的加速过程和裂缝(或蚀孔)的扩展则由缝内H+Cl~-酸性电池的作用所控制。并将导致裂尖区氢脆。

Stress corrosion cracking of En 24 steel has been systematically investigated using constant displacement cantilever beam tests, slow strain rate tests,potentiodynamic polarization and etching technique. The experiments were performed in natural sea water at various applied potentials and a range of heat treatments was used to obtain hardness from 250 to 550 kgfmm~(-2). The results show that the trend of environment sensitive fracture of En 24 steel decreases with the decrease of strength level. There is a critical...

Stress corrosion cracking of En 24 steel has been systematically investigated using constant displacement cantilever beam tests, slow strain rate tests,potentiodynamic polarization and etching technique. The experiments were performed in natural sea water at various applied potentials and a range of heat treatments was used to obtain hardness from 250 to 550 kgfmm~(-2). The results show that the trend of environment sensitive fracture of En 24 steel decreases with the decrease of strength level. There is a critical strength level, below which no SCC is observed. The stress corrosion susceptibility is dependent upon applied potential, being least at an applied potential of-900 mV(SCE). The experimental data, including crack growth rates, fractographs, physico-metallurgical and electrochemical parameters etc, suggest that the mechanism of SCC of En 24 steel is closely related to the applied potential. At potentials more negative than-900 mV, hydrogen induced cracking occurs. From-570 to-900 mV, environmentally assisted cracking results from an anodic dissolution mechanism while both mechanisms may be operative at potentials near to-900 mV.

用恒位移弯曲试验,慢应变速率试验、动电位扫描和浸蚀试验研究了En24钢在海水中的应力腐蚀特性。结果表明,En24钢的环境敏感断裂倾向随强度降低而降低;强度低于临界值,则不出现应力腐蚀裂缝。外加电位对En24钢的环境敏感特性有重要影响,裂缝扩展平台速度于-900mV处出现极小值。依据裂缝扩展动力学、断口形貌、物理冶金参数和电化学等方面的判据,认为En24钢在海水中的应力腐蚀与电位密切相关。低于-900mV,属氢致开裂;高于-900mV,则由阳极溶解过程所制约;在一定电位范围内,不排除两种机理共同作用的可能性。

 
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