Results of a Japanese round robin program for creep crack growth using Gr.92 steel welds

M. Tabuchi; A. T. Yokobori; Ryuji Sugiura; M. Yatomi; A. Fuji; K. Kobayashi

doi:10.1016/j.engfracmech.2010.03.044

Results of a Japanese round robin program for creep crack growth using Gr.92 steel welds

M. Tabuchi, A. T. Yokobori, Ryuji Sugiura, M. Yatomi, A. Fuji, K. Kobayashi

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

24 Citations (Scopus)

Abstract

High-Cr ferritic heat-resistant steels are commonly used for boiler components in ultra-super critical thermal power plants operated at about 600 °C. In the welded joints of these steels, Type-IV cracks initiate in the fine-grained HAZ during long-term use at high temperatures, causing their creep strength to decrease. To assist the standardization of the testing and evaluation method for creep crack growth (CCG) in the welded components, we conducted round robin tests (RRT) using 9Cr-0.5Mo-1.8. W-V-Nb steel (ASME Grade 92 steel) welded joint as part of the VAMAS TWA31 collaboration. The CCG tests were carried out using the CT specimen and the circumferentially-notched round bar specimen for both the base metal and welded joint of Gr.92 steel. Testing was performed at four different laboratories. The effects of specimen configuration, temperature, load, and stress triaxiality conditions on the crack growth rate and fracture life were investigated.

Original language	English
Pages (from-to)	3066-3076
Number of pages	11
Journal	Engineering Fracture Mechanics
Volume	77
Issue number	15
DOIs	https://doi.org/10.1016/j.engfracmech.2010.03.044
Publication status	Published - 2010 Oct

Keywords

Creep crack growth
High temperature fracture mechanics
High-Cr ferritic Gr.92 steel
Weld joint

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1016/j.engfracmech.2010.03.044

Cite this

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title = "Results of a Japanese round robin program for creep crack growth using Gr.92 steel welds",

abstract = "High-Cr ferritic heat-resistant steels are commonly used for boiler components in ultra-super critical thermal power plants operated at about 600 °C. In the welded joints of these steels, Type-IV cracks initiate in the fine-grained HAZ during long-term use at high temperatures, causing their creep strength to decrease. To assist the standardization of the testing and evaluation method for creep crack growth (CCG) in the welded components, we conducted round robin tests (RRT) using 9Cr-0.5Mo-1.8. W-V-Nb steel (ASME Grade 92 steel) welded joint as part of the VAMAS TWA31 collaboration. The CCG tests were carried out using the CT specimen and the circumferentially-notched round bar specimen for both the base metal and welded joint of Gr.92 steel. Testing was performed at four different laboratories. The effects of specimen configuration, temperature, load, and stress triaxiality conditions on the crack growth rate and fracture life were investigated.",

keywords = "Creep crack growth, High temperature fracture mechanics, High-Cr ferritic Gr.92 steel, Weld joint",

author = "M. Tabuchi and Yokobori, {A. T.} and Ryuji Sugiura and M. Yatomi and A. Fuji and K. Kobayashi",

year = "2010",

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AU - Yokobori, A. T.

AU - Sugiura, Ryuji

AU - Yatomi, M.

AU - Fuji, A.

AU - Kobayashi, K.

PY - 2010/10

Y1 - 2010/10

N2 - High-Cr ferritic heat-resistant steels are commonly used for boiler components in ultra-super critical thermal power plants operated at about 600 °C. In the welded joints of these steels, Type-IV cracks initiate in the fine-grained HAZ during long-term use at high temperatures, causing their creep strength to decrease. To assist the standardization of the testing and evaluation method for creep crack growth (CCG) in the welded components, we conducted round robin tests (RRT) using 9Cr-0.5Mo-1.8. W-V-Nb steel (ASME Grade 92 steel) welded joint as part of the VAMAS TWA31 collaboration. The CCG tests were carried out using the CT specimen and the circumferentially-notched round bar specimen for both the base metal and welded joint of Gr.92 steel. Testing was performed at four different laboratories. The effects of specimen configuration, temperature, load, and stress triaxiality conditions on the crack growth rate and fracture life were investigated.

AB - High-Cr ferritic heat-resistant steels are commonly used for boiler components in ultra-super critical thermal power plants operated at about 600 °C. In the welded joints of these steels, Type-IV cracks initiate in the fine-grained HAZ during long-term use at high temperatures, causing their creep strength to decrease. To assist the standardization of the testing and evaluation method for creep crack growth (CCG) in the welded components, we conducted round robin tests (RRT) using 9Cr-0.5Mo-1.8. W-V-Nb steel (ASME Grade 92 steel) welded joint as part of the VAMAS TWA31 collaboration. The CCG tests were carried out using the CT specimen and the circumferentially-notched round bar specimen for both the base metal and welded joint of Gr.92 steel. Testing was performed at four different laboratories. The effects of specimen configuration, temperature, load, and stress triaxiality conditions on the crack growth rate and fracture life were investigated.

KW - Creep crack growth

KW - High temperature fracture mechanics

KW - High-Cr ferritic Gr.92 steel

KW - Weld joint

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Results of a Japanese round robin program for creep crack growth using Gr.92 steel welds

Abstract

Keywords

ASJC Scopus subject areas

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