Study on development policy for new cryogenic structural material for superconducting magnet of fusion reactor

Arata Nishimura,Yoshinori Ono,Osamu Umezawa, Susumu Kumagai, Yohko Kato,Tetsuya Kato,Tetsumi Yuri,Masayuki Komatsu

Nuclear Materials and Energy（2022）

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摘要

•Mechanical properties at 4 K of XM-19 with 100 mm thick were measured.•Midsection of huge wrought showed lower strength. Nb segregation must be avoid.•Crystal refinement, precipitation by V and Nb and N solution strengthening are useful.•Area of over 1200 MPa yield stress and over 150 MPa√m fracture toughness is a new target.•Development policy of a new cryogenic structural material was presented.

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关键词

Cryogenic structural material,Fusion DEMO,Hall-Petch diagram,Fracture toughness,Huge component

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