In:
Materials and Corrosion, Wiley, Vol. 71, No. 6 ( 2020-06), p. 887-899
Kurzfassung:
In this paper, FeCrNiBSiMo x ( x = 1.0, 1.5, 2.0, 2.5) stainless steels were successfully prepared using a laser melting deposition technology, with the aim to investigate the effect of Mo content on microstructure and corrosion behaviors. The results showed that the as‐deposited specimens were composed mostly of α‐Fe and a small amount of (Cr, Mo) 7 C 3 , and (Cr, Mo) 7 C 3 existed in the inter‐dendritic (ID) region. As the Mo content increased, grain refinement could be clearly observed, and the area of the ID region increased from 27% to 54%. The low‐angle boundaries accounted for 60–70% of the grain boundaries of the as‐deposited specimens. Increasing the content of Mo improved the microhardness of the as‐deposited specimens from 652 HV to 813 HV. The corrosion current density of the as‐deposited specimens with the Mo mass fractions of 1.0%, 1.5%, 2.0%, and 2.5% were 1.37 × 10 −6 , 1.02 × 10 −7 , 6.19 × 10 −7 , and 3.06 × 10 −7 A/cm 2 , respectively. The as‐deposited specimen with Mo content of 1.5% had lower cumulative erosion loss and erosion loss rate than other as‐deposited specimens. The FeCrNiBSiMo x ( x = 1.5) specimen exhibited excellent resistance to electrochemical corrosion and cavitation erosion.
Materialart:
Online-Ressource
ISSN:
0947-5117
,
1521-4176
DOI:
10.1002/maco.201911353
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2020
ZDB Id:
1481051-7
ZDB Id:
1224916-6
ZDB Id:
202688-0
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