Investigations about the influence of the time–temperature curve on the formation of intermetallic phases during electron beam welding of steel–aluminium material combinations
Investigations about the influence of the time–temperature curve on the formation of intermetallic phases during electron beam welding of steel–aluminium material combinations
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DOI：
10.1007/s40194-014-0128-9
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发表时间：
2014-04
影响因子：
2.1
通讯作者：
U. Reisgen;C. Otten;J. Schönberger
中科院分区：
文献类型：
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作者：
U. Reisgen;C. Otten;J. Schönberger
方形对接接头的电子束焊接已用于低合金钢 DC05 和铝合金 AlMg3 的无填充材料的连接。为此，开发了一种夹紧装置，该装置允许板自由膨胀和收缩，并且还可以通过电子束进行原位加热。为了考察边缘时间-温度曲线对金属间相形成的影响，在一系列试验中，钢板的预热温度从100℃逐渐升高到500℃。通过 EBSD 分析可以识别出两种金属间相：钢侧为 η 相 (Al5Fe2)，铝侧为 θ 相 (Fe4Al13)。通过测量的各个相宽度的相关性、温度曲线的评估和准静态拉伸试验的结果，已经确定了对各种金属间相的发展产生影响的因素。最大拉伸强度为 200 MPa，总相宽度为 2.3 μm。
Electron beam welding of square butt joints has been used for the joining of the low-alloy steel DC05 and the aluminium alloy AlMg3without filler materials. To this end, a clamping device which allows free expansion and shrinking of the plates and also in situ heating by the electron beam has been developed. In order to examine the influence which the time–temperature curve at the edge exerts on the formation of the intermetallic phases, in a test series, the preheating temperature of the steel plate has been successively increased from 100 to 500 °C. It has been possible to identify two intermetallic phases by EBSD analysis—on the steel side, the η-phase (Al5Fe2) and, on the aluminium side, the Θ-phase (Fe4Al13). Through the correlation of the measured individual phase widths, the evaluation of the temperature curves and the results from the quasi-static tensile tests, the factors which exert influence on the development of various intermetallic phases have been identified. A maximum tensile strength of 200 MPa with a total phase width of 2.3 μm has been achieved.