ウエダ　ヨシオ   Ueda Yoshio   上田　良夫    所属   追手門学院大学  理工学部 電気電子工学科    職種   教授
言語種別	英語
発行・発表の年月	2017/07
形態種別	論文
査読	査読あり
標題	Degradation of tungsten monoblock divertor under cyclic high heat flux loading
執筆形態	共著・編著（代表編著を除く）
掲載誌名	FUSION ENGINEERING AND DESIGN
掲載区分	国外
出版社・発行元	ELSEVIER SCIENCE SA
巻・号・頁	120,pp.49-60
著者・共著者	Shuhei Nogami,Michitoshi Toyota,Wenhai Guan,Akira Hasegawa,Yoshio Ueda
概要	The degradation behavior of the ITER divertor under the cyclic high heat flux loading has been varied in the previous studies, which would be induced by the intrinsic difference in the thermo-mechanical properties of each pure W material. Therefore, the experimental characterization of the thermo-mechanical properties of the W materials and the numerical structural analysis using these data are necessary to clarify the degradation mechanism and the prediction of the fracture scenario and lifetime. In this study, the degradation behavior of the pure W monoblock divertor mockup during the cyclic high heat flux loading test at 20 MW/m(2) was evaluated and the macro-crack formation mechanism was discussed based on the structural analysis. The macro-crack formation of the divertor mockup in the present study could occur due to a complexed low temperature cleavage fracture accompanied by the plastic deformation under cyclic loading.
DOI	10.1016/j.fusengdes.2017.04.102
ISSN	0920-3796/1873-7196