TY - JOUR
T1 - Mechanical properties and microstructures of high-chromium V-Cr-Ti type alloys
AU - Sakai, K.
AU - Satou, M.
AU - Fujiwara, M.
AU - Takanashi, K.
AU - Hasegawa, A.
AU - Abe, K.
N1 - Funding Information:
The authors gratefully acknowledge the contributions of Dr T. Shishido, Institute for Materials Research, Tohoku University, to the preparation of the samples. This work was partly supported by the JUPITER-II program (Japan–USA Program of Irradiation/Integration Test for Fusion Research) and a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
PY - 2004/8/1
Y1 - 2004/8/1
N2 - The mechanical properties of V-Cr-Ti type alloys depended on heat treatment conditions and Cr concentrations. In this paper the correlation between mechanical properties and heat treatment conditions as a function of Cr concentrations was explored using mini-size Charpy impact tests and microstructure observations. Vanadium alloys evaluated were V-xCr-4Ti (x=4, 7, 10, 12, 15, 20). Microstructure observations using transmission electron microscope (TEM) were performed to characterize the precipitates. The typical precipitates in the V-xCr-4Ti alloys were identified as Ti(C,O,N) and TiO 2. Ti(C,O,N) was observed in specimens annealed between 900 and 1000 °C and TiO2 was between 1100 and 1200 °C. The DBTT of V-(4,7)Cr-4Ti alloys was around -190 °C, while DBTT for the other alloys were above -30 °C. It is proposed that formation of precipitates larger than 400 nm in diameter found in the alloys containing more than 10% of Cr as well as solution hardening of Cr are affected to the increase of the DBTT of the alloys.
AB - The mechanical properties of V-Cr-Ti type alloys depended on heat treatment conditions and Cr concentrations. In this paper the correlation between mechanical properties and heat treatment conditions as a function of Cr concentrations was explored using mini-size Charpy impact tests and microstructure observations. Vanadium alloys evaluated were V-xCr-4Ti (x=4, 7, 10, 12, 15, 20). Microstructure observations using transmission electron microscope (TEM) were performed to characterize the precipitates. The typical precipitates in the V-xCr-4Ti alloys were identified as Ti(C,O,N) and TiO 2. Ti(C,O,N) was observed in specimens annealed between 900 and 1000 °C and TiO2 was between 1100 and 1200 °C. The DBTT of V-(4,7)Cr-4Ti alloys was around -190 °C, while DBTT for the other alloys were above -30 °C. It is proposed that formation of precipitates larger than 400 nm in diameter found in the alloys containing more than 10% of Cr as well as solution hardening of Cr are affected to the increase of the DBTT of the alloys.
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U2 - 10.1016/j.jnucmat.2004.04.089
DO - 10.1016/j.jnucmat.2004.04.089
M3 - Conference article
AN - SCOPUS:3342893258
VL - 329-333
SP - 457
EP - 461
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
IS - 1-3 PART A
T2 - Proceedings of the 11th Conference on Fusion Research
Y2 - 7 December 2003 through 12 December 2003
ER -