AbstractThe similarities and differences in the cracking susceptibility between welding and resolidification after plasma disruption were examined experimentally using a number of primary candidate alloy samples with different chemical compositions. The product of the number density and the average depth of the cracks was measured after simulated disruption, employing a hydrogen ion beam as the heat source, and was compared with the Varestraint test result. An adequate correlation was observed between them, which indicates that the cracking susceptibility during plasma disruption can be well estimated from the welding cracking susceptibility.
溶接時とプラズマ崩壊後の再凝固時における割れ感受性の類似点と相違点を、異なる化学組成を有する複数の一次候補合金試料を用いて実験的に検討した。水素イオンビームを熱源として用いた模擬崩壊試験後における割れの数密度と平均深さの積を測定し、バレストレイン試験結果と比較した。両者の間には適切な相関関係が観察され、プラズマ崩壊時の割れ感受性は溶接時の割れ感受性から良好に推定可能であることが示された。