Charge Weld Effects on High Cycle Fatigue Behavior of a Hollow Extruded AA6082 Profile
Charge Weld Effects on High Cycle Fatigue Behavior of a Hollow Extruded AA6082 Profile
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DOI：
10.1007/s11665-010-9755-5
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发表时间：
2011-10
影响因子：
2.3
通讯作者：
N. Nanninga;N. Nanninga;C. L. White;R. Dickson
中科院分区：
文献类型：
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作者：
N. Nanninga;N. Nanninga;C. L. White;R. Dickson
对沿空心AA6082挤压过程中不同位置的试样的疲劳性能进行了评估，其中电荷焊缝（多坯料挤压中连续坯料之间的界面）性能和取芯程度（坯料后端高度剪切的坯料表面材料的积累）预计会发生变化。在靠近挤压前端的地方，充药焊缝分离较大，含充药焊缝横向试样的疲劳强度较低。载荷焊缝分离与疲劳破坏的关系直接关系到载荷焊缝的性能。试样较低的疲劳性能可能与沿装药焊缝界面的早期过载疲劳破坏有关。取心似乎对疲劳行为没有显著影响。
Fatigue properties of specimens taken from different locations along the length of a hollow AA6082 extrusion, where charge weld (interface between successive billets in multi-billet extrusions) properties and the degree of coring (accumulation of highly sheared billet surface material at back end of billet) are expected to vary, have been evaluated. The fatigue strength of transverse specimens containing charge welds is lower near the front of the extrusion where the charge weld separation is relatively large. The relationship between fatigue failure and charge weld separation appears to be directly related to charge weld properties. The lower fatigue properties of the specimens are likely associated with early overload fatigue failure along the charge weld interface. Coring does not appear to have significantly affected fatigue behavior.