4304 構造用アルミニウム合金の摩擦攪拌接合継手の曲げ性(DS1 軽量化対応接合技術-アルミニウム合金の摩擦攪拌接合施工法に関する研究-,ディベロップメント・セッション)

概要

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Studies were carried out on bending properties of friction stir joints under the combination of 5083, 6N01 (6005C) and 7N01 (7204) alloys of 8 mm thick (t) parent materials by two or three fabricators and four ways of friction stir welding (FSW) procedures, and also on difference in bending properties caused by the dissimilarities. Bend test was performed with a former in 5XX joints for 5083 parent materials and also with a roller in 6XX and 7XX joints for 6N01 and 7N01 parent materials, respectively, basically according to ISO5173. In all of 5XX joints, no crack was observed till the bend diameter of 32mm (4t) for both of face and root sides. In almost all of 6XX joints, the critical bend diameter was 41 mm (5.1t). However, in the joint under the specified combination of parent materials and procedure, the diameter was 28 mm (3.5t). It is considered that the distribution of higher local elongation kept over comparatively wider range of the joint contributed to its bendablity. In all of 7XX joints, the critical bend diameter was 54 mm (6.8t). Any difference of the bendability could not be observed for dissimilarities in parent materials or FSW procedures in 5XX and 7XX joints.
2008-12-09