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首页> 外文期刊>Journal of Materials Engineering and Performance >Damaging Prediction of Difficult-to-Work Aluminum Alloys During Equal Channel Angular Pressing
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Damaging Prediction of Difficult-to-Work Aluminum Alloys During Equal Channel Angular Pressing

机译：等通道角挤压过程中难加工铝合金的破坏预测

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摘要

Severe plastic deformation (SPD) is a well-established method in the recent years for grain refinement in metallic materials. Equal channel angular pressing (ECAP) is one of the most effective SPD techniques. Inherent failures of ECAP, consisting in billet damage, take place if not made a correct process design. In this article, the evolution of damaging for a difficult-to-work Al-Mg alloy during ECAP was investigated. A tridimensional finite element analysis was performed for four different die designs to study the influence of die geometry and process parameters on billet damaging. To validate modeling we used, load level and strain distribution were depicted. Experimental tests were performed to test the numerical prediction. The results show that cracking may be reduced or eliminated by inner fillet corner of the die channels. It was demonstrated that the predicted results were in good agreement with experimental data obtained for 5052 aluminum alloy. The direct effect of knowledge about load and damaging during ECAP is to prevent both tool and billet damage.
机译：严重的塑性变形（SPD）是近年来用于金属材料晶粒细化的公认方法。等通道角压（ECAP）是最有效的SPD技术之一。如果未进行正确的过程设计，则会发生ECAP固有的故障，包括坯料损坏。在本文中，研究了在ECAP期间难加工的Al-Mg合金的破坏演变。对四种不同的模具设计进行了三维有限元分析，以研究模具几何形状和工艺参数对坯料损坏的影响。为了验证我们使用的建模，描述了载荷水平和应变分布。进行实验测试以检验数值预测。结果表明，可以通过模具通道的内圆角减少或消除裂纹。结果表明，预测结果与5052铝合金的实验数据吻合良好。有关ECAP期间负载和损坏的知识的直接作用是防止工具和坯料损坏。

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