迄今，该系高强铝合金的强度已大幅提高，但抗应力腐蚀开裂性能有待改进。
So far, high-strength aluminum alloy has fairly high strength, but its stress corrosion cracking resistance needs to be further enhanced.
依据NACE标准研究了X80级管线钢的抗硫化物应力腐蚀开裂(SSCC)和氢致开裂(HIC)行为。
Based on the NACE standard, the behavior of restriction on hydrogen induced cracking (HIC) and sulfide stress corrosion cracking (SSCC) of X80 grade pipeline steel was investigated.
先天的安全储备不足加上各敏感性因素引起的应力波动，两者的效应总和达到混凝土的抗拉极限值，造成结构开裂；
The congenital safety margin and the stress fluctuations which caused by various sensitive parameters combine to the antipulls limit value of the concretes, and create the structure dehiscence.
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