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Tsuchida, Yutaka*; Ebihara, Kenichi
Tetsu To Hagane, 103(11), p.653 - 659, 2017/11
Times Cited Count：2 Percentile：11.38(Metallurgy & Metallurgical Engineering)A single peak in thermal desorption profiles of hydrogen, which are measured in low-temperature thermal desorption spectrometry (L-TDS) for a very thin plate specimen of tempered martensitic steel, was reproduced successfully by the superposition of two Gaussian distributions. Then, the parameters concerning the detrapping rate constants for both peaks, which are trap energy and pre-exponential factor, were calculated using the Choo-Lee plot. We confirmed that Kissinger model incorporating the obtained parameters could simulate the two peaks. In addition, we reproduced the single peak well using the reaction-diffusion equation incorporating the obtained parameters and the appropriate trap site concentration. From the results, we interpreted that the one peak corresponds to dislocation and the other to grain-boundary.
Tsuchida, Noboru; ; ; ; ; Saito, Minoru;
ANL/RERTR/TM-19, CONF-9209266, 0, p.259 - 266, 1995/00
no abstracts in English
Tsuchida, Noboru; ; ; ; ; Saito, Minoru;
JAERI-M 92-152, 92 Pages, 1992/10
no abstracts in English
*; *; *; *
PNC TN941 85-128, 70 Pages, 1985/09
High temperature tensile tests were performed on SUS304, SUS321 and 2.25Cr-1MO Steel to verify the tensile properties of Materials Strength Standard for Monju. Tensile tests were also performed at ultra-high temperatures (up to 900
C) on SUS304 and SUS321 steel plates and SUS321 steel forging. Evaluation of high temperature and high strain rate tensile properties which simulate the tensile condition of sodium-water reaction was made. Major results obtained are as follows: (1)Tensile properties of SUS 304, SUS321 and 2.25Cr-1Mo steel below 650C. (i)Tensile strength and 0.2% proof strength did not fall below the design tensile strength and design yield strength respectivety. (ii)Fracture elongation and reduction of area agreed well with those of references, and showed satisfactory values. (iii)Elasto-plastic paramaters were almost comparable with those for Monju design. This proves the validity of Elasto-plastic parameters for Monju. (2)Tensile properties of SUS304 steel plate, SUS 321 steel plate and forging at 650
900C. (i)Tensile properties data (tensile strength, 0.2% proof strength, fracture elongation and reduction of area) were obtained up to 900C at strain rates of 1 and 10%/min. (ii)Fracture elongation and reduction of area of these steels were high enough, and improved as the strain rate increased. (iii)An attempt to evaluate the effect of strain rate on tensile strength was made. Applying this to the ultra-high temperature data at 110%/min, tensile strength under JIS high temperature test condition was estimated.
Segawa, Tomoomi; Kawaguchi, Koichi; Ishii, Katsunori; Tsuchida, Hayahisa*; Fujiwara, Kota*; Kaneko, Akiko*; Abe, Yutaka*
no journal, ,
Development and demonstration of elemental technologies in simplified pellet fabrication method are developed. While the cylindrical vessel is expected to have a higher speed and capacity than the flat vessel, spilling phenomenon occurs, and device design optimization is required. The mechanism of flashing and spilling, and microwave heating characteristics of high loss solution are studied. The progress of the development of elemental technologies and microwave heating test results using simulated reprocessed solutions are reported. The dielectric loss of distilled water increased from the lower end to near the central axis, and water was internally heated, and then strong convection currents were formed with a large velocity vector from the center upward. In contrast, in KCl solution with 10 mass%, which has the same dielectric loss rate as the reprocessed solution, the outer periphery was heated and large convection was hardly generated, suggesting that heating is non-uniform.
