Mechanistic Factors In‰uencing Fatigue Behavior of the A5052/SPC270C Joints by Friction Stir Spot Welding
Mechanistic Factors In‰uencing Fatigue Behavior of the A5052/SPC270C Joints by Friction Stir Spot Welding
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影响 A5052/SPC270C 搅拌摩擦点焊接头疲劳行为的机械因素
DOI：
10.11283/jlwa.56.61
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
岡根正樹，清水貴明，安井利明，福本昌宏
中科院分区：
文献类型：
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作者：
大西 航助;朱 世杰;安池 俊也，高橋 剛，福地 孝平;岡根正樹，清水貴明，安井利明，福本昌宏
对A5052铝镁合金与低碳钢SPC 270 C的搅拌摩擦点焊接头进行了疲劳试验。试验结果表明，接头的疲劳强度和疲劳断裂模式的转变与焊缝区A5052的厚度有关，而与切入深度无关。无论接合条件如何，单位接合面积的净剪切强度几乎相等。最后，它被澄清，在这项研究中使用的异种FSSW接头的疲劳性能显着影响的平衡，在三种独立的强度，这是在连接界面处的剪切强度，疲劳强度的焊接区域下方的部分A5052和SPC 270 C之间的连接间隙周围的焊接区域的疲劳强度起源。
Al-Mg alloy A5052 and low carbon steel SPC270C joints by the friction stir spot welding (FSSW) were used for fatigue tests. From the experimental results, it was found that fatigue strengths and transition in fatigue fracture mode of the joints depended on thickness of A5052 beneath FSSW region rather than plunge depth condition. The net shear strength per unit joining area was almost equal irrespective of the joining condition. Finally, it was clarified that fatigue property of the dissimilar FSSW joint used in this study was significantly influenced by equilibrium in three kinds of independent strength which were a shear strength at joining interface, a fatigue strength of partial A5052 beneath the welded area and a fatigue strength originated at joining gap between A5052 and SPC270C around periphery of the welded region.