1) threshold of stress corrosion
应力腐蚀门槛应力值
2) SCC-threshold
应力腐蚀门槛值
1.
While the way of improving the SCC-threshold of 37SiMnCrNiMoV is studied by using orthogonal test design,which leads to good results.
本文应用正交优化设计对提高37SiMnCrNiMoV的应力腐蚀门槛值的方法进行了研究,取得了良好的效果。
3) threshold stress
门槛应力
1.
During dynamically charging four kinds of C90 tubular steels with hydrogen,the concentration of divisible hydrogen c0 is directly proportional to cathodic current i, and thenormalized threshold stress σc.
四种高强度油并管钢动态充氢时，进入试样的可扩散氢含量c0和充氢电流i成正比；而氢致断裂门槛应力σc与名义屈服强度σt之比和Inc0成正比，即σc／σt=A-BInc0。
2.
The threshold stress decreased linearly with the logarithm of hydrogen concentration for the samples in constant load tests.
用电化学和恒载荷拉伸试验方法,测定了不同充氢电流下氢在X80管线钢中的扩散系数、试样中可扩散氢浓度以及管线钢氢致断裂门槛应力。
3.
Hydrogen permeation coefficient and diffusible hydrogen content in drill pipe steel S135 during cathodic charging with hydrogen were studied by an electrochemical method,and the hydrogen induced cracking(HIC) threshold stress of the steel was investigated using constant load tests.
通过电化学渗氢技术与恒载荷拉伸试验方法,研究了不同充氢电流密度下S135钻杆用钢的氢扩散系数、试样中的可扩散氢浓度及其氢致开裂门槛应力。
4) KISCC
应力腐蚀门坎值(K_(ISCC))
5) stress intensity factor for slow crack growth
应力强度因子门槛值
1.
So in the basis of the theory of fracture mechanics,the stress intensity factor for slow crack growth,Kth and the crack growth rate are studied on the pre-cracked compact tensile sp.
为此，本课题基于断裂力学理论，研究了Ti55合金电子束焊缝(EBW)在不同原始氢浓度下裂纹扩展的应力强度因子门槛值K_(th)及裂纹扩展速率da／dt，为有效控制氢致延迟裂纹的产生和扩展奠定理论基础。
6) stress corrosion cracking
应力腐蚀
1.
Role of Hydrogen in Stress Corrosion Cracking of High Strength Pipeline Steel;
氢在高强度管道钢应力腐蚀中的作用
2.
Stress Corrosion Cracking of Pipeline Stell Welded Joints and Defence;
油气管道焊接接头的应力腐蚀及防护
3.
Influence of inhomogeneity on stress corrosion cracking of welded joints;
不均匀性对焊接接头应力腐蚀开裂的影响
补充资料：焊接接头应力腐蚀
焊接接头应力腐蚀
welded joint stress corrosion
honJle Jiet0U ylngll fush}焊接接头应力腐蚀(welded joint Stress Cor-rosion)金属焊接接头处在腐蚀介质和表面拉伸应力联合作用下产生的脆性开裂现象。铬镍奥氏体不锈钢应力腐蚀开裂倾向大于马氏体或铁素体钢。关于这种腐蚀的机理迄今尚无完整的理论。以铬镍奥氏体不锈钢应力腐蚀为例，其特征为:(1)对腐蚀介质和材料的匹配有选择性，如MgC12、CaCI:等对不锈钢并无腐蚀作用，但在有表面拉应力时，就容易产生腐蚀开裂。(2)腐蚀裂纹只发生在局部区域，而不是整个与介质接触的界面上。(3)应力腐蚀开裂总是从表面开始，并沿厚度方向向纵深发展，不断地沿其尖端作选择性腐蚀，可在不太大的拉应力作用下迅速扩展，在几乎没有明显的塑性变形下即发生脆性开裂。(4)应力腐蚀开裂时的显微裂纹常常既有主干又有分支，貌似落叶后的树干和树枝。(5)在显微镜下观察一般多呈穿晶形式，也有穿晶或混合形式。(6)300℃以上很少见到应力腐蚀开裂现象。最易于出现应力腐蚀开裂的温度范围大约是50~200‘C。 (许祖泽)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条