Effects of Addition of V and Nb on Ω in High Cr Ferritic Steels

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Creep tests and microstructural observations in several high Cr ferritic steels bearing V and Nb were carried out in order to investigate effects of addition of V and Nb on , which is a coefficient of  method. Creep strength was improved with increasing the V content and was slightly lowered by increasing the Nb content.  in all the steels bearing V or Nb was lager than that in fundamental steel. The dependence of  on the amount of additions was different between V and Nb. In steels bearing V,  became larger with increasing V content. In steels bearing Nb,  became smaller. These results revealed that  corresponds to the creep strength, indicating that the value of  can be estimated using the strengthening effects of the additive element.

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Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

95-98

Citation:

M. Mitsuhara et al., "Effects of Addition of V and Nb on Ω in High Cr Ferritic Steels", Materials Science Forum, Vols. 561-565, pp. 95-98, 2007

Online since:

October 2007

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$38.00

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DOI: https://doi.org/10.1016/s1359-6454(97)00176-6

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