closed dislocation meaning in English

闭合性脱位
无创脱位

It was found that many dislocations were emitted from the crack tip during the early stage of crack propagation and were driven out of the crack tip area , and them piled up inversely . a closed dislocation free zone ( dfz ) was formed between the crack tip and the pile - up dislocations . keeping displacement constant , the dislocations were still emitted from the crack tip for a while
本文首先系统地研究了工业纯金属( fe ， al ， ti和mg )断裂的微观过程，发现所研究的工业纯金属断裂过程裂尖均首先发射位错，并离开裂尖向前运动、在裂尖留下无位错区，位错反塞积在五位错区的端部，反塞积位错群一般呈封闭状包围无位错区。