Effect of External Stress on Microstructural Change during Electron-Irradiation in Nickel

• Published in: Journal of nuclear science and technology Vol. 21; no. 9; pp. 671 - 677
• Main Authors: JITSUKAWA, Shiro, KATANO, Yoshio, SHIRAISHI, Kensuke
• Format: Journal Article
• Language: English
• Published: Tokyo Taylor & Francis Group 01.09.1984; Atomic Energy Society of Japan; Taylor & Francis Ltd
• Subjects: Condensed matter: structure, mechanical and thermal properties; creep mechanism; Cross-disciplinary physics: materials science; rheology; Defects and impurities in crystals; microstructure; electron beams; Electrons and positron radiation effects; Exact sciences and technology; external stress; Frank loop; growth rates; irradiation; Materials science; Metals, semimetals and alloys; micrestructural change; nickel; Physical radiation effects, radiation damage; Physics; radiation damage; rhombus loop; Specific materials; stress-enhanced void swelling; Structure of solids and liquids; crystallography; unfault; High voltage electron microscopy; Mechanical stress; Irradiation; Transition metal; Metal; Substructure; Dislocation loop; Stable dislocation; Experimental study; Microstructure; Dislocation; Electrons
• ISSN: 0022-3131; 1881-1248
• DOI: 10.1080/18811248.1984.9731099

The microstructural change in pure nickel was continuously observed with a high voltage electron microscope during electron-irradiation with applying external load at 723 K. Frank loops with diameter larger than 10 nm were observed to unfault during the irradiation under external stress. The unfaulting of the radiation-produced Frank loops, which nucleated without external load, was induced by the loading of resolved shear stress of 3.7 MPa or larger along unfaulting direction. The growth rate of the unfaulted loops was fairly larger than that of Frank loops. Unfaulted loops were observed to glide during irradiation under the external stress when they grew to exceed a certain critical size by climb.