Laser Deep Penetration Welding of an Aluminum Alloy with Simultaneously Applied Vibrations

Laser Deep Penetration Welding of an Aluminum Alloy with Simultaneously Applied Vibrations
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同时施加振动的铝合金激光深熔焊

DOI:
10.1007/s40516-016-0032-9
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发表时间:
2017
影响因子:
--
通讯作者:
Vollertsen
Vollertsen
中科院分区:
--
文献类型:
--
作者:
Woizeschke;Nicolay;Vollertsen

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在铝焊接中,焊缝的晶粒结构是影响焊缝性能的重要因素。在铸造技术中,机械振动对液态金属凝固过程中晶粒生长的影响被称为细化方法。在本文中,这种方法的可移植性从相对长时间的过程中的铸造领域的激光深熔焊接的短时间过程进行了研究。因此,在板上焊道全熔透焊接实验期间,试样以高达4 kHz的频率进行正弦振动。通过在每个焊缝的横截面显微照片的中心上应用圆形截距程序来确定所得的晶粒尺寸。结果表明,晶粒细化是在一般可实现的机械振动在可听频率范围内的激光全穿透小孔焊接的铝合金EN AW-5083。
In aluminum welding, the grain structure of produced seams is an essential factor with respect to the seam properties. In the casting technology the effect of mechanical vibrations on the grain growth during the solidification of liquid metals is known as a refinement method. In this paper, the transferability of this approach from comparatively long-time processes in the field of casting to the short-time process of laser deep penetration welding is investigated. Therefore, specimens were sinusoidal vibrated with frequencies up to 4 kHz during bead-on-plate full-penetration welding experiments. The resulting grain size was determined by applying the circular intercept procedure on the center of a cross-section micrograph of each weld. The results show that grain refinement is in general achievable by mechanical vibrations in the audible frequency range during laser full penetration keyhole welding of the aluminum alloy EN AW-5083.
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发表时间: 1981
影响因子: 16.1
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