RATE CONTROLLING PROCESSES FOR CRACK-GROWTH IN HYDROGEN-SULFIDE FOR AN AISI-4340 STEEL

被引：34
|
作者：
LU, M [1 ]
PAO, PS [1 ]
WEIR, TW [1 ]
SIMMONS, GW [1 ]
WEI, RP [1 ]
机构：
[1] LEHIGH UNIV,BETHLEHEM,PA 18015
来源：
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1981年 / 12卷 / 05期
关键词：
545 Iron and Steel;
D O I：
10.1007/BF02648345
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The kinetics of crack growth for an AISI 4340 steel (tempered at 477 K) have been determined as a function of pressure at room temperature and as a function of temperature at hydrogen sulfide pressures of 0. 133 and 2. 66 kPa. At the lower pressure, the rate of crack growth is controlled by the rate of transport of hydrogen sulfide to the crack tip. At the higher pressure, crack growth is controlled by the rate of diffusion of hydrogen into the steel ahead of the crack tip. Embrittlement results from hydrogen produced by reactions of hydrogen sulfide with the steel.
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页码：805 / 811
页数：7
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