Abstract
Dislocation loop motion plays an important role in irradiation creep but their dynamic evolution is hardly investigated. In this work, the one-dimensional motion of loops was investigated by in-situ TEM in Fe9Cr1.5W ferritic/martensitic steel under the combination of irradiation and constant compression stress and compared with the case of irradiation only to highlight the synergistic effect. Loops preferred to glide along one side that was close to the compression direction and the other side was retarded.. The proportion of large mobile loops was also increased. Jump frequency was doubled after the addition of compression, indicating the high sensitivity to stress.
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