Effects of alloying additions and material microstructure on the accuracy of the predictive law of creep crack growth for W-strengthened 9-12% Cr ferritic heat-resistant steel

Ryuji Sugiura; A. Toshimitsu Yokobori; Shinjyu Takamori; Masaaki Tabuchi; Akio Fuji; Mitsuo Yoda; Kenichi Kobayashi; Takeo Yokobori

doi:10.2320/matertrans.MRA2007112

Effects of alloying additions and material microstructure on the accuracy of the predictive law of creep crack growth for W-strengthened 9-12% Cr ferritic heat-resistant steel

Ryuji Sugiura, A. Toshimitsu Yokobori, Shinjyu Takamori, Masaaki Tabuchi, Akio Fuji, Mitsuo Yoda, Kenichi Kobayashi, Takeo Yokobori

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

The life of creep crack growth for W-strengthened 9-12%Cr steel is sensitive to the alloying additions and to differences in material microstructure, such as lath martensitic structure and grain size caused by differences in cooling rates in the steel ingots during the manufacturing process, which results in the large scatter of experimental data from the law of creep crack growth life. In the present study, creep crack growth tests were conducted using W-strengthened 9-12%Cr steels with various contents of alloying additions and the dimensions of micro-nano structures, The effects of the composition of alloying additions and material microstructures on the life of creep crack growth for W-strengthened 9-12%Cr steel were clarified.

Original language	English
Pages (from-to)	2928-2936
Number of pages	9
Journal	Materials Transactions
Volume	48
Issue number	11
DOIs	https://doi.org/10.2320/matertrans.MRA2007112
Publication status	Published - 2007 Nov

Keywords

Crack growth
Creep
Grain size
Lath martensitic structure
Molybdenum equivalence (molybdenum% + 1/2tungsten%)
Tungsten strengthened 9-12%chromium ferritic heat-resistant steel

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.2320/matertrans.MRA2007112

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Sugiura, R., Yokobori, A. T., Takamori, S., Tabuchi, M., Fuji, A., Yoda, M., Kobayashi, K., & Yokobori, T. (2007). Effects of alloying additions and material microstructure on the accuracy of the predictive law of creep crack growth for W-strengthened 9-12% Cr ferritic heat-resistant steel. Materials Transactions, 48(11), 2928-2936. https://doi.org/10.2320/matertrans.MRA2007112

Effects of alloying additions and material microstructure on the accuracy of the predictive law of creep crack growth for W-strengthened 9-12% Cr ferritic heat-resistant steel. / Sugiura, Ryuji; Yokobori, A. Toshimitsu; Takamori, Shinjyu; Tabuchi, Masaaki; Fuji, Akio; Yoda, Mitsuo; Kobayashi, Kenichi; Yokobori, Takeo.

In: Materials Transactions, Vol. 48, No. 11, 11.2007, p. 2928-2936.

Research output: Contribution to journal › Article › peer-review

Sugiura, R, Yokobori, AT, Takamori, S, Tabuchi, M, Fuji, A, Yoda, M, Kobayashi, K & Yokobori, T 2007, 'Effects of alloying additions and material microstructure on the accuracy of the predictive law of creep crack growth for W-strengthened 9-12% Cr ferritic heat-resistant steel', Materials Transactions, vol. 48, no. 11, pp. 2928-2936. https://doi.org/10.2320/matertrans.MRA2007112

Sugiura, Ryuji ; Yokobori, A. Toshimitsu ; Takamori, Shinjyu ; Tabuchi, Masaaki ; Fuji, Akio ; Yoda, Mitsuo ; Kobayashi, Kenichi ; Yokobori, Takeo. / Effects of alloying additions and material microstructure on the accuracy of the predictive law of creep crack growth for W-strengthened 9-12% Cr ferritic heat-resistant steel. In: Materials Transactions. 2007 ; Vol. 48, No. 11. pp. 2928-2936.

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abstract = "The life of creep crack growth for W-strengthened 9-12%Cr steel is sensitive to the alloying additions and to differences in material microstructure, such as lath martensitic structure and grain size caused by differences in cooling rates in the steel ingots during the manufacturing process, which results in the large scatter of experimental data from the law of creep crack growth life. In the present study, creep crack growth tests were conducted using W-strengthened 9-12%Cr steels with various contents of alloying additions and the dimensions of micro-nano structures, The effects of the composition of alloying additions and material microstructures on the life of creep crack growth for W-strengthened 9-12%Cr steel were clarified.",

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