Effect of weld reinforcement on fatigue properties of A6N01 aluminum alloy welded joint |
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Authors: | Liu Jian Yu Min Fang Xifeng Wang Ren and Cheng Yongming |
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Affiliation: | CSR Qingdao Sifang Co., Ltd., Qingdao, 266111,School of Material Science and Engineering, Southwest Jiaotong University, Chengdu, 6100063,CSR Qingdao Sifang Co., Ltd., Qingdao, 266111,CSR Qingdao Sifang Co., Ltd., Qingdao, 266111 and CSR Qingdao Sifang Co., Ltd., Qingdao, 266111 |
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Abstract: | Fatigue properties of smooth and reinforcement A6N01 aluminum alloy welded joints were characterized in this paper. Based on measured S-lgN curves and fatigue fracture morphologies, effect of weld reinforcement on the fatigue property of the welded joint was studied. Results show that the weld toe is the weakness region of the reinforcement welded joint due to the stress concentration in this area, thus the fatigue fracture occurred at the weld toe for all the reinforcement welded joints; while the fatigue property of the smooth welded joint was improved due to remove of the weld reinforcement, and the welding defect was the key factor of the fatigue fracture, thus its fracture zones mainly located at welding zone and fusion line. |
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Keywords: | smooth and reinforcement welded joint fatigue S-N curve fracture morphology |
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