溶接学会論文集
Print ISSN : 0288-4771
レーザ・アークハイブリッド溶接を用いた十字継手の疲労強度
判治 剛舘石 和雄清水 優内田 大介木村 陵介浅野 浩一
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2018 年 36 巻 4 号 p. 219-229

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This study examined fatigue strength of cruciform joints fabricated with laser-arc hybrid welding. Load-carrying and non-load-carrying cruciform welded joints with a plate thickness from 8mm to 25mm were tested under tensile cyclic loads and out-of-plane bending cyclic loads. Measurements of weld toe profile, residual stress and hardness around a welded portion were also conducted. The test results revealed that the fatigue strength of the hybrid welded joints is equivalent to that of arc welded joints and satisfies the fatigue design curves for arc welded joints in JSSC recommendation. Besides, the thickness effect on fatigue strength was observed in the hybrid welded joints as well as in arc welded joints.

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