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JAEA Reports

Fracture toughness tests of 9 Cr type steels at elevated temperature; 2 nd. Report

*; ; ; *; *

PNC TN9410 91-132, 85 Pages, 1991/06

PNC-TN9410-91-132.pdf:1.47MB

A series of high temperature fracture toughness tests of 9Cr type steels was put in practice on a three-years scheme in 1988. In this experimental study, Mod.9Cr-1Mo steel, 9Cr-2Mo steel and 9Cr-1Mo-Nb-V steel are tested, and these fructure toughness are investigated on the basis of J integral. In a first year, high temperature fracture toughness test method was established using R-curve method and unloading compliance method, and J$$_{a}$$ values of Mod. 9Cr-1Mo steel were measured at RT, 400$$^{circ}$$C, 500$$^{circ}$$C, 550$$^{circ}$$C and 600$$^{circ}$$C. In a second year, fracture toughness tests of 9Cr-2Mo steel, 9Cr-1Mo-V-Nb steel and these aged materials were performed, and several factors which affected fracture toughness values of 9Cr type steels were clarified. In this report, the test results in a second year are summarized. In a last year, fracture toughness tests of weldment and thick plate of 9Cr type steel are going to be carried out. Furthermore, an effect of crack direction on J$$_{a}$$ value will be studied.

JAEA Reports

Fracture toughness test of 9Cr type steel at elevated temperature (No.1)

*; *; Kano, Shigeki; *; *; *; *

PNC TN9410 89-096, 105 Pages, 1989/05

PNC-TN9410-89-096.pdf:2.31MB

A series of high temperature fracture toughness tests of 9Cr type steel was put in practice on a three-year scheme in 1988, In this experimental study, Mod.9Cr-1Mo steel, 9Cr-2Mo steel and TEMPALOY SW-9(9Cr-1Mo-Nb-V) steel are tested, and fracture toughness (J$$_{Q}$$) of base metal (As-received, SR-treated, Aged) and weldment (weld metal, HAZ) of these three types of steel are investigated. In a first year, fracture toughness tests of base metal (As-received, SR-treated) of Mod.9Cr-1Mo steel were carried out at RT, 400$$^{circ}$$C, 500$$^{circ}$$C, 550$$^{circ}$$C and 600$$^{circ}$$C, respectively. In this report, the test results in the first year are shown. Fracture toughness tests were performed using R-curve method and unloading compliance method according to ASTM E813. The fracture toughness value was the lowest at 400$$^{circ}$$C. Even at 400$$^{circ}$$C, however, Mod.9Cr-1Mo steel showed enough high fracture toughness (J$$_{c}$$$$>$$ 350kJ/m$$^{2}$$), In the fracture toughness test, tearing modurous T$$_{mat}$$ was also measured.

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