Potentials of in situ monitoring of aluminum alloy forging by acoustic emission
Potentials of in situ monitoring of aluminum alloy forging by acoustic emission
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DOI：
10.1016/j.acme.2016.04.012
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发表时间：
2016-09
影响因子：
4.4
通讯作者：
B. Behrens;A. Bouguecha;C. Buse;K. Wölki;A. Santangelo
中科院分区：
文献类型：
--
作者：
B. Behrens;A. Bouguecha;C. Buse;K. Wölki;A. Santangelo
锻造过程中的偏差会导致工件在超过材料的成形极限时失效。在生产过程中，优选早期检测制造故障。声发射（AE）技术的检查相对于它的能力，以检测在润滑条件下的偏差，并在不同的铝零件的几何形状和合金的结构完整性在形成。在第一步中，不同形状的试样进行镦粗，以便研究发生的缺陷以及改变摩擦条件与声发射响应的相关性。然后，锻造十字接头并进行声发射分析。结果表明，锻造过程中的裂纹检测是可行的，但受到材料塑性的限制。此外，它表明，在成形过程中的声发射特性强烈依赖于各自的合金。对于无缺陷温锻，发现AE信号中反映了不同的阶段，便于检测过程偏差。
Deviations during forging processes lead to workpiece failure when the forming limits of the material are exceeded. In production processes an early detection of manufacturing faults is preferred. The acoustic emission (AE) technique is examined with respect to its ability to detect deviations in lubrication conditions and in the structural integrity of different aluminum part geometries and alloys during forming. In a first step, an upsetting of varying specimen shapes was performedinordertostudy correlationsofoccurring defectsaswell as changing friction conditions with acoustic emission response. Afterwards, a cross joint was forged and AE was analyzed. The results suggest that crack detection during forging is feasible but limited by material ductility. In addition, it is shown that the characteristics of the acoustic emission during forming strongly depend on the respective alloy. With respect to faultless warm forging it is found that different stages are reflected in the AE signal, facilitating the detection of process deviations.