title: EBSD and electron channeling study of anomalous slip in oligocrystals of high chromium ferritic stainless steel.
abstract: In the present study, electron backscatter diffraction (EBSD) and electron channeling contrast imaging (ECCI) techniques were applied to investigate the deformation pattern of coarse ferrite grains after being subjected to 3%, 6%, and 10% tensile deformation. Oligocrystals of Crofer®22H ferritic steel were obtained as experimental material at 1075°C for 22min annealing. Using kernel average misorientation (KAM) mapping obtained from EBSD, possible slip planes are (110), (101), (12-1) and (32-1) in grain A; (0-11), (-101), (-112), (1-21) in grain B; and (0-11), (1-21) and (11-2) in grain C. Combining ECCI and EBSD techniques enables us to identify two a0[11¯1]/2 edge dislocations that occur on the (110)[1-11] and (32-1)[1-11] slip systems for grain A, thereby breaking down Schmid's law.
authors.affiliation: Department of Materials Science and Engineering, National Cheng-Kung University, Tainan 701, Taiwan.
authors.forename: Zheng-Wen
authors.initials: ZW
authors.lastname: Hsiao
authors.affiliation: Department of Materials Science and Engineering, National Cheng-Kung University, Tainan 701, Taiwan.
authors.forename: Ting-Yi
authors.initials: TY
authors.lastname: Wu
authors.affiliation: China Steel Corporation, Kaohsiung 81233, Taiwan.
authors.forename: Delphic
authors.initials: D
authors.lastname: Chen
authors.affiliation: Department of Materials Science and Engineering, National Cheng-Kung University, Tainan 701, Taiwan. Electronic address: jckuo@mail.ncku.edu.tw.
authors.forename: Jui-Chao
authors.initials: JC
authors.lastname: Kuo
authors.affiliation: Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 811, Taiwan.
authors.forename: Dong-Yih
authors.initials: DY
authors.lastname: Lin
keywords: Anomalous slip; EBSD; KAM; Oligocrystal; bcc