Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1583283 | Materials Science and Engineering: A | 2007 | 4 Pages |
Abstract
Hydrogen-assisted cracking (HAC) of T-250 maraging steel has been studied. The results showed that HAC could occur in air when the relative humidity (RH) was â¥30%. The arrested threshold stress intensity factor, KIH (MPa m1/2), decreases linearly with increasing the logarithm of hydrogen concentration entered into the samples during putting in humid air or charging in the solution, C (ppm), i.e. KIH = 49.5-26.1 ln C. The threshold stress intensity factor for the crack initiating from notch tip in humid air with RH = 82%, KIH(Ï), increases with increasing the square root of notch radius Ï, as Ï > Ï0 = 0.08 mm, i.e. KIH(Ï>0.08âmm)=â32.7+244.9Ï, however, when Ï â¤Â Ï0, KIH(Ï â¤Â 0.08 mm) = KIH = 37.5 MPa m1/2.
Related Topics
Physical Sciences and Engineering
Materials Science
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Authors
Y.P. Zhang, D.M. Shi, W.Y. Chu, L.J. Qiao, Y.L. Shi, S.L. Zheng, S.B. Wang,