J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (10): 2213-2219.DOI: 10.1016/j.jmst.2019.03.043
• Orginal Article • Previous Articles Next Articles
Y.H. Fanac, B. Zhanga*(), J.Q. Wangc, E.-H. Hanc, W. Kec
Received:
2019-01-19
Revised:
2019-03-10
Accepted:
2019-03-25
Online:
2019-10-05
Published:
2019-08-28
Contact:
Zhang B.
Y.H. Fan, B. Zhang, J.Q. Wang, E.-H. Han, W. Ke. Effect of grain refinement on the hydrogen embrittlement of 304 austenitic stainless steel[J]. J. Mater. Sci. Technol., 2019, 35(10): 2213-2219.
C | Cr | Ni | Si | Mn | P | S | Fe |
---|---|---|---|---|---|---|---|
0.042 | 18.87 | 9.33 | 0.27 | 1.6 | 0.026 | 0.002 | Bal. |
Table 1 Chemical compositions (wt%) of the investigated austenitic stainless steel.
C | Cr | Ni | Si | Mn | P | S | Fe |
---|---|---|---|---|---|---|---|
0.042 | 18.87 | 9.33 | 0.27 | 1.6 | 0.026 | 0.002 | Bal. |
Fig. 4. Typical hydrogen permeation curves of 800A, 900A and 950A samples (tb refers to the breakthrough time defined as the time when the transient current density equals 10% of the steady-state current density).
Fig. 5. Typical engineering stress?strain curves of 800A, 900A and 950A samples tested in air and hydrogen environment with a strain rate of 2 × 10-5 s-1.
Fig. 6. SEM images of fracture surfaces of the 800A samples (a, b, c), 900A (d, e, f) and 950A (g, h, i) after slow strain rate test. (a, d, g) samples tested in the air; (b, e, h) the fracture surfaces tested under hydrogen charging (D refers to dimple fracture and QC refers to quasi cleavage fracture); (c, f, i) magnifying SEM images of quasi cleavage fractures shown in (b, e, h).
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