Amalina Aina Kaharudin, Ran Saeki, Mai Takaya, Tadashi Minoda, Tomoyuki Homma
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引用次数: 0
摘要
采用VDA (Verband der Automobilindustrie)无预应变弯曲试验，对具有纤维和再结晶两种组织的1.4 mm厚Al-4.4Zn-1.4Mg(质量%)合金挤压扁棒的可弯曲性进行了评价。再结晶试样比纤维试样具有更好的弯曲性能。表面附近的织构条件对VDA的可弯曲性影响最大。然而，在VDA弯曲试验的载荷下降过程中，微孔隙的形成也导致了更快的开裂现象。
Influence of initial extruded microstructures of Al-4.4Zn-1.4Mg alloy flat bar on VDA bendability
The bendability of extruded Al-4.4Zn-1.4Mg (mass%) alloy flat bars with 1.4 mm thickness having two types of microstructures which are fibrous and recrystallized is evaluated by a Verband der Automobilindustrie (VDA) bending test without pre-strain. The recrystallized specimen has better bendability than the fibrous one. The texture condition nearby the surfaces affects the VDA bendability the most. However, the microvoid formations also contribute in faster cracking phenomena during the load drop of the VDA bending test.
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