Analysis of Creep Deformation Process of Heat Resistant Steels Using Positron Annihilation Lifetime

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Creep deformation mechanism of the steels with a different matrix, α (ferrite), α’ (martensite) and γ (austenite), and precipitates such as MX and M23C6 has been analyzed using positron annihilation lifetime measurement. The positron annihilation lifetime has been found to be a very useful tool for evaluating the characteristic creep damage of the steels with different microstructure and the corresponding microstructural evolution during creep deformation. The creep deformation process of the α steel is heterogeneous, while the α’+M23C6 steel exhibits gradual changes in the creep rate in both transient and acceleration creep regions with the largest off-set strain, implying the homogeneous creep deformation. The α’+M23C6+ MX steel is in between the α and α’+M23C6 steels. The homogeneous creep deformation takes place in the γ steel.

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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:

2233-2236

Citation:

M. Igarashi et al., "Analysis of Creep Deformation Process of Heat Resistant Steels Using Positron Annihilation Lifetime", Materials Science Forum, Vols. 561-565, pp. 2233-2236, 2007

Online since:

October 2007

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$38.00

[1] K. Muramatsu: Proc. Advanced Heat Resistant Steels For Power Generation, edited by R. Viswanathan and J. Nutting, The University Press, Cambridge, (1998), 543.

[2] K. H. Mayer: Proc. 28 th MPA seminar, Stüttgart, (2002), Paper No. 47.

[3] F. Masuyama: Proc. Advanced Heat Resistant Steels For Power Generation, edited by R. Viswanathan and J. Nutting, The University Press, Cambridge, (1998), 33.

[4] M. Igarashi, S. Muneki and F. Abe: Proc. 8 th Int. Conf. On Creep and Fracture of Engineering Materials and Structures, edited by T. Sakuma and K. Yagi, Trans Tech Publications, Switzerland, 171-174 (2000), 505.

[5] K. Yamada, S. Muneki, M. Igarashi and F. Abe: ISIJ International, 42 (2002), 779.

[6] M. Igarashi, K. Yamada, H. Okubo, S. Muneki and F. Abe: CAMP ISIJ, 19 (2005), 303. (in Japanese).

[7] M. Igarashi, M. Yoshizawa, H. Semba, H. Okada, K. Yamada, H. Okubo, S. Muneki and F. Abe: Proc. 1st Inter. Sympo. on Steel Science (IS3-2007), ISIJ, Kyoto, May 16-19, 2007, in press.

[8] Y. Shirai: Bulletin of JIM, 27(1988), 869. (in Japanese).

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