Study on the Compression Stress-strain Behavior of Porous Al and Porous Al/Al2O3 Composite
摘 要
用粉末烧结法制备出了开孔型多孔铝及以Al2O3为增强相的铝基多孔复合材料,材料相对密度及孔径分别在0.25~0.40和100~400 μm范围内变化.对这两种多孔材料的压缩行为进行了研究.结果表明:Al/Al2O3复合材料有着比多孔铝更为有利的响应特征和更高的流动应力,该复合材料的压缩应力-应变曲线较为平坦,在与多孔铝相对密度相近时,屈服强度提高40%以上;经T6热处理,Al/Al2O3复合材料的屈服强度可进一步提高35%左右;此外,该复合材料的压缩行为具有明显的孔径依赖性,随孔径增大,流动应力升高,这主要与烧结过程中孔表面残留的气体有关.
Abstract
An open cell porous Al and Al/Al2O3 composite were fabricated by powder sintering technique.The relative density and pore size of resulted specimens can be changed in the ranges of 0.25-0.40 and 100-400 μm,respectively.The compression experiments were conducted and the results show that the porous Al/Al2O3 composite has a more beneficial response feature and higher flow stress than the porous Al.The former shows a relatively smooth plateau and when the relative densities of the two porous materials are approximately the same,the porous composite shows a 40% elevation relative to the porous Al,which can be further enhanced by T6 heat treatment that leads to around 35% increase.In addition,the stress-strain behavir of the porous composite shows significant pore size dependence,i.e.the flow stress increases with increasing the pore size,which is believed to be related to trapped gas in the pore surface during the sintering.
中图分类号 TB31 TB303
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收稿日期 2006/8/29
修改稿日期 2006/11/27
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备注孙蔚(1955-),女,安徽合肥人,副教授,硕士.
引用该论文: 孙蔚. Study on the Compression Stress-strain Behavior of Porous Al and Porous Al/Al2O3 Composite[J]. Materials for mechancial engineering, 2007, 31(8): 56~59
孙蔚. 多孔铝及多孔Al/Al2O3复合材料的压缩行为[J]. 机械工程材料, 2007, 31(8): 56~59
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参考文献
【1】Banhart J.Manufacture,characterization and application of cellular metals and metal foams[J].Progress in Mater Sci,2001,46:559-632.
【2】汤小东,孙雯,何德坪.孔结构参数对闭孔泡沫铝合金超声衰减性能的影响[J].机械工程材料,2006,30(10):59-61.
【3】吕艳凤,程和法,王强,等.开孔泡沫铝导电性的研究金属功能材料[J].金属功能材料,2006(3):4-6.
【4】王录才,曾松岩,王芳.复合结构泡沫铝隔声性能的研究[J].机械工程材料,2006,30(10):56-58.
【5】Han F S,Cheng H F,Wang J X,et al.Effect of pore combination on the mechanical properties of an open cell aluminum foam[J].Scripta Mater,2004,50:13-17.
【6】Kennedy A R,Asavavisitchai S.Effects of TiB2 particle addition on the expansion,structure and mechanical properties of PM Al foams[J].Scripta Mater,2004,50:115-119.
【7】Balch D K,Dunand D C.Load partitioning in aluminum syntactic foams containing ceramic microspheres[J].Acta Mater,2006,54:1501-1511.
【8】Zhao Y Y,Fung T,Zhang L P,et al.Lost carbonate sintering process for manufacturing metal foams[J].Scripta Mater,2005,52:295-298.
【9】Zhao Y Y,Sun D X.A novel sintering-dissolution process for manufacturing Al foams[J].Scripta Mater,2001,44:105-110.
【10】Han F S,Zhu Z G,Gao J C.Compressive deformation and energy absorbing characteristic of foamed aluminum[J].Metall Trans A,1998,29:2497-2502.
【11】Gibson L J,Ashby M F,Schajer G S,et al.The mechanics of two-dimensional cellular materials[J].Proc R Soc Lond,1982,382:25-42.
【2】汤小东,孙雯,何德坪.孔结构参数对闭孔泡沫铝合金超声衰减性能的影响[J].机械工程材料,2006,30(10):59-61.
【3】吕艳凤,程和法,王强,等.开孔泡沫铝导电性的研究金属功能材料[J].金属功能材料,2006(3):4-6.
【4】王录才,曾松岩,王芳.复合结构泡沫铝隔声性能的研究[J].机械工程材料,2006,30(10):56-58.
【5】Han F S,Cheng H F,Wang J X,et al.Effect of pore combination on the mechanical properties of an open cell aluminum foam[J].Scripta Mater,2004,50:13-17.
【6】Kennedy A R,Asavavisitchai S.Effects of TiB2 particle addition on the expansion,structure and mechanical properties of PM Al foams[J].Scripta Mater,2004,50:115-119.
【7】Balch D K,Dunand D C.Load partitioning in aluminum syntactic foams containing ceramic microspheres[J].Acta Mater,2006,54:1501-1511.
【8】Zhao Y Y,Fung T,Zhang L P,et al.Lost carbonate sintering process for manufacturing metal foams[J].Scripta Mater,2005,52:295-298.
【9】Zhao Y Y,Sun D X.A novel sintering-dissolution process for manufacturing Al foams[J].Scripta Mater,2001,44:105-110.
【10】Han F S,Zhu Z G,Gao J C.Compressive deformation and energy absorbing characteristic of foamed aluminum[J].Metall Trans A,1998,29:2497-2502.
【11】Gibson L J,Ashby M F,Schajer G S,et al.The mechanics of two-dimensional cellular materials[J].Proc R Soc Lond,1982,382:25-42.
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