Evolution of cellular dislocation structures and defects in additively manufactured austenitic stainless steel under ion irradiation. (15th March 2020)

• Record Type: Journal Article
• Authors: Li, Shilei; Hu, Jing; Chen, Wei-Ying; Yu, Jingyue; Li, Meimei; Wang, Yandong
• Is Part Of: Scripta materialia. Number 178(2020)
• Page Start: 245
• Page End: 250
• Publication Date: 2020-03-15
• Subjects: Additive manufacturing -- Austenitic stainless steel -- Ion irradiation -- Irradiation-induced defect -- Cellular dislocation structure; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.11.036
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The evolution of irradiation-induced defects in additively manufactured (AM) austenitic stainless steel was investigated in situ by 1 MeV Kr ion irradiation at 450 and 600 °C in a transmission electron microscope. Cellular dislocation structure in AM steel act as sink/trap sites for the irradiation-induced defects, resulting in the lower density and smaller dislocation loops in AM steel than conventional forged (CF) steel at 450 °C. The higher stacking fault energy and local stress concentration induced by cellular dislocation structure in AM steel promotes the unfaulting process and the formation of network dislocation at 600 °C. Graphical abstract: Image, graphical abstract