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首页> 外文期刊>Journal of Materials Engineering and Performance >Tensile and Fatigue Behavior of Friction-Stir Welded Tailor-Welded Blank of Aluminum Alloy 5754
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Tensile and Fatigue Behavior of Friction-Stir Welded Tailor-Welded Blank of Aluminum Alloy 5754

机译：5754铝合金搅拌摩擦拼焊板的拉伸疲劳性能。

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摘要

Friction stir welding is becoming increasingly desirable in many applications, including tailor-welded blanks in which two sheets of different thicknesses are joined together to form blanks that can be subsequently stamped into a final product shape. In this article, we have studied the static tensile and tension-tension fatigue behavior of friction stir welded joint in a tailor-welded blank of aluminum alloy 5754. It was observed that the yield and tensile strengths of friction stir welded specimens with weld located 90° to the tensile direction are close to the base material values, but its elongation is nearly half the elongation for the base material. The friction stir welded joints had relatively high-fatigue strength, and was even superior to that of the base aluminum alloy in the high-cycle region. Pre-straining caused by press forming lowered the elongation to failure, but improved the fatigue performance.
机译：摩擦搅拌焊接在许多应用中变得越来越受欢迎，包括定制焊接的毛坯，其中将不同厚度的两片连接在一起以形成毛坯，随后可以将这些毛坯冲压成最终产品形状。在本文中，我们研究了在5754铝合金拼焊板中搅拌摩擦焊接接头的静态拉伸和拉伸-拉伸疲劳行为。观察到，在90度焊缝处搅拌摩擦焊接的试样的屈服强度和拉伸强度相对于拉伸方向的角度接近基材值，但是其伸长率几乎是基材伸长率的一半。搅拌摩擦焊接头具有较高的疲劳强度，在高循环区域甚至优于基础铝合金。压制成型引起的预应变降低了断裂伸长率，但改善了疲劳性能。

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