Mechanical manipulation of solidification during laser beam welding of aluminum

Mechanical manipulation of solidification during laser beam welding of aluminum
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铝激光束焊接过程中凝固的机械控制

DOI:
10.1007/s40194-017-0530-1
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发表时间:
2018
影响因子:
2.1
通讯作者:
--
中科院分区:
材料科学3区
文献类型:
--
作者:

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机械振动影响凝固过程中的形核和晶粒长大条件,是铸造工艺领域中常用的细化方法。本文研究了铝合金激光焊接过程中的外加振动对焊接组织的影响。因此,研究了能较好地描述铸造过程中晶粒细化的频率幅值因子是否可以用来描述激光深熔焊接过程中的晶粒细化。结果表明,由于外加激励,局部晶粒度减小,等轴晶率增加。在这项研究中,没有观察到最终的等轴晶百分比与频率和幅度的乘积的关系。
Mechanical vibrations affect the nucleation and grain growth conditions during solidification and are used as refinement method in the field of casting processes. This paper contributes to identify the influence of applied vibrations during laser beam welding of aluminum on the resulting grain structure. Therefore, it is investigated if the frequency amplitude factor, which suitably describes the grain refinement in casting processes, can be used to describe the grain refinement in laser deep penetration welding. The results show a local grain size reduction and an increase of the percentage of equiaxed grains due to applied excitation. A dependence of the resulting percentage of equiaxed grains on the product of frequency and amplitude cannot be observed within this study.
DOI: 10.1179/imtr.1981.26.1.71
发表时间: 1981
影响因子: 16.1
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