Fatigue Crack Growth in 2-1/4-Cr-1Mo Steel Exposed to Hydrogen Containing Gases
Fatigue Crack Growth in 2-1/4-Cr-1Mo Steel Exposed to Hydrogen Containing Gases
复制标题
暴露于含氢气体的 2-1/4-Cr-1Mo 钢的疲劳裂纹扩展
DOI：
10.1115/1.3443678
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发表时间：
1979
影响因子：
1.2
通讯作者：
R. Wei
中科院分区：
文献类型：
--
作者：
R. Brazill;G. Simmons;R. Wei
煤气化容器和管道（外部）中使用的钢可能暴露于温度和压力高达600/sup 0/K和10 MPa的氢气、水蒸气（蒸汽）、硫化氢、甲烷、一氧化碳、二氧化碳和其他气体的混合物中。在某些操作条件下，这种混合物可以增强或抑制这些钢中的裂纹生长。作为一个程序的一部分，以确定这种增强或抑制的热力学条件，疲劳裂纹扩展实验已进行了2 1/4Cr-1 Mo（ASTM A542，2级）钢在氢气，水蒸气，和硫化氢在低压（低于133千帕）。结果表明，这些环境中的一些相当大的增强疲劳裂纹扩展，也表明，这种材料的应力腐蚀开裂的明显免疫力并不意味着相同的免疫力腐蚀疲劳。结果将讨论的温度，气体压力和负载变量的影响，并将解释的化学反应动力学。
Steels used in coal gasification vessels and piping (externals) can be exposed to mixtures of hydrogen, water vapor (steam), hydrogen sulfide, methane, carbon monoxide, carbon dioxide, and other gases at temperatures and pressures up to 600/sup 0/K and 10 MPa. Such mixtures, under certain operating conditions, can either enhance or inhibit crack growth in these steels. As a part of a program to identify thermodynamic conditions for this enhancement or inhibition, fatigue crack growth experiments have been carried out on a 2 1/4Cr-1Mo (ASTM A542, Class 2) steel in hydrogen, water vapor, and hydrogen sulfide at low pressures (below 133 kPa). The results indicate considerable enhancement of fatigue crack growth by some of these environments and also indicate that the apparent immunity of this material to stress corrosion cracking does not imply the same immunity to corrosion fatigue. The results will be discussed in terms of the influences of temperature, gas pressure and loading variables, and will be interpreted in terms of chemical reaction kinetics.