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Relating microtexture and dynamic micro hardness in an extruded AA8090 alloy and AA8090-8 vol% SiCp composite

机译:挤出的AA8090合金和AA8090-8体积%SiCp复合材料的微观组织和动态显微硬度的相关性

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摘要

The present study involves combined measurements of microtexture and dynamic ultra micro hardness (DUH) in hot extruded AA8090 aluminum alloy and its composite reinforced with 8 vol% SiCp. Both the materials show strong crystallographic fiber textures-(111) and (001). The dynamic micro hardness shows a clear pattern of difference between these two fiber textures, (111) oriented grains being harder and stiffer. The difference in theta ld between the fibers, where theta and d are the average cell misorientation and cell size, respectively, was marginal in the alloy and thus cannot explain the observed hardness difference. The hardness difference can be explained from the difference in Taylor factors between the respective fibers. Elastic stiffness values estimated from microtexture and DUH follow a similar trend qualitatively. (C) 2005
机译:本研究涉及热挤压AA8090铝合金及其由8%体积SiCp增强的复合材料的微观组织和动态超微硬度(DUH)的组合测量。两种材料都显示出很强的结晶纤维质地-(111)和(001)。动态显微硬度显示出这两种纤维质地之间清晰的差异模式,(111)取向的晶粒越来越硬。纤维之间的θld差异(其中θ和d分别是平均孔取向错误和孔尺寸)在合金中仅占很小的比例,因此无法解释观察到的硬度差异。可以通过各纤维之间的泰勒因子的差异来解释硬度差。由微观纹理和DUH估算的弹性刚度值在定性上遵循相似的趋势。 (C)2005

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