Embrittlement of T-200 maraging steel in a hydrogen sulfide solution

Hydrogen embrittlement of ultra high strength 300 grade maraging steel

“…2. Another important observation is that the HE susceptibility increases with the strength of the material and decreases with the reverted austenite content, in good agreement with studies of Rao et al [14], Reddy et al [18], Tsay et al [20], and Wang et al [23].…”

“…At a low strain rate, diffusion and concentration of hydrogen into the material is predominantly at grain boundaries [20,23]. This promotes intercrystalline fracture [20], and propagation along the martensite lath boundaries [23] in maraging steels. Previous studies have showed that at high strength conditions maraging steels have been most susceptible to HIC [14,18].…”

“…Hydrogen-induced crack (HIC) propagates along both reverted austenite and martensite lath boundaries as result of enrichment in the hydrogen concentration [23]. Maraging steels in over-aged conditions exhibits higher resistance to HE in comparison to other aging conditions [19,20,23]. In this work, HE susceptibility of ultra high strength 300 grade maraging steel in solution annealed and aged conditions was studied using slow strain rate test (SSRT).…”

“…Maraging steels may suffer HE when exposed to certain environments [14,[17][18][19][20][21][22][23].…”

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“…5 In addition, maraging steel is less prone to hydrogen embrittlement when compared to materials of similar strength, due to the slower diffusion of hydrogen in the material. [6][7][8] In fact, the materials used for the fabrication of the lift system would have been more likely to exhibit hydrogen embrittlement than the maraging steel.…”