Investigation of the Influence of Low Cycle Alternating Bending Loads on the Properties of Thin Sheets Possessing Different Crystal Lattice Structures
Investigation of the Influence of Low Cycle Alternating Bending Loads on the Properties of Thin Sheets Possessing Different Crystal Lattice Structures
复制标题
低周交变弯曲载荷对不同晶格结构薄板性能影响的研究
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
W. Bach
中科院分区：
文献类型：
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作者：
M. Hepke;M. Rodman;H. Haverkamp;J. Zilberg;A. A. Briukhanov;D. Bormann;M. Schaper;W. Bach
低循环、交替弯曲是薄板制造和加工过程中常见的成形类型。这种成形发生在卷取成卷和从卷取出卷的过程中，同时在蚀刻过程、清洗、涂覆、矫直、弯曲和深冲压过程中通过轧制设备。研究了镁合金AZ31、工业纯铝和低碳钢板在3辊弯曲机和11辊矫直机上循环弯曲后的力学性能、显微组织和织构。建立了这种类型的成形对片材的性质的显著影响，特别是对于具有hcp晶格结构的材料。在后者的材料中观察到明显的各向异性，这可以解释为织构软化的效果。这可归因于在弯曲方向上激活了孪晶形成机制。研究了预轧、弯曲和退火工艺对镁合金AZ31板材性能的影响。
Low cycle, alternating bending is a common type of forming during the manufacture and processing of thin sheets. This forming occurs during the rolling-up into and rolling-out from coils, whilst passing through rolling equipment during the etching process, washing, coating, straightening, bending and deep drawing. Investigations of the mechanical properties, the microstructure and texture of sheets made of the magnesium alloy AZ31, technically pure aluminium and low carbon steels were carried out following cyclic bending on a 3-roller bending machine and on an 11-roller straightening machine. A significant influence of this type of forming on the sheet's properties was established, in particular for materials possessinghcp crystal lattice structures. Pronounced anisotropic properties were observed in the latter material which can be explained by the effect of texture softening. This can be attributed to the activation of twin formation mechanisms in the bending direction. The influence of the prior rolling, the bending regime and the annealing was demonstrated on improving the properties of the sheets made of the magnesium alloy AZ31.