Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yasui Toshiaki and Ishida Sho and Fukumoto Masahiro,Material flow observation for dissimilar friction stir welding of aluminum alloy and steel by X-ray CT method,Journal of Japan Institute of Light Metals,04515994,The Japan Institute of Light Metals,2014,64,11,604-610,https://cir.nii.ac.jp/crid/1390001206340206208,https://doi.org/10.2464/jilm.64.604