Atomic scale observation of FCC twin, FCC → 9R and 9R → 12R' transformations in cold-rolled Hafnium. (15th January 2022)

• Record Type: Journal Article
• Authors: Zhang, Yingdong; Li, Geping; Yuan, Fusen; Han, Fuzhou; Ali, Muhammad; Guo, Wenbin; Ren, Jie
• Is Part Of: Scripta materialia. Number 207(2022)
• Publication Date: 2022-01-15
• Subjects: Pure Hafnium -- Phase transformation -- 9R structure -- 12R' structure -- Face-centered cubic twin; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2021.114284
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The face-centered cubic (FCC) twin, FCC →9R and 9R → 12R' transformations were observed simultaneously in cold-rolled pure Hf. The formation of FCC twin was due to the Shockley partial dislocations extended in the different basal planes. For FCC →9R transformation, the collective gliding of Shockley partial dislocations along (111) planes with every three atomic layers eventually lead to the stacking sequence of close-packed structure, i.e. ACBACBA CBA changed to ABACACB CBA. The 9R → 12R' transformation was related to the formation of the full dislocations at every three atomic layers. Graphical abstract: Image, graphical abstract