Compression properties of Al/Al-Si-Cu alloy functionally graded aluminum foam fabricated by friction stir processing route
Compression properties of Al/Al-Si-Cu alloy functionally graded aluminum foam fabricated by friction stir processing route
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DOI：
10.2320/matertrans.m2012376
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发表时间：
2013-03
影响因子：
1.2
通讯作者：
Y. Hangai;Kousuke Saito;T. Utsunomiya;Soichiro Kitahara;O. Kuwazuru;N. Yoshikawa
中科院分区：
文献类型：
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作者：
Y. Hangai;Kousuke Saito;T. Utsunomiya;Soichiro Kitahara;O. Kuwazuru;N. Yoshikawa
泡沫铝具有重量轻、能量吸收能力强等优点，是一种很有前途的汽车零部件材料，可以提高汽车的燃油效率和乘员安全性。1，2）功能梯度泡沫铝（FG）材料的性能随位置的变化而变化，有望改善泡沫铝的性能。泡沫铝的制备方法有铸造法、粉末冶金法、复合泡沫铝法和先驱体法等，这些方法通过改变材料的孔结构来实现材料性能的变化。最近，已经开发了一种用于制造泡沫铝前体的摩擦搅拌加工（FSP）路线。11）FSP是根据摩擦搅拌焊接（FSW）的基本原理开发的，FSW是一种固态粘合工艺。12，13）已经证明，通过使用FSW将前体与添加的不同量的发泡剂粘合，可以制造具有不同孔结构的FG泡沫铝，其在发泡过程之前通过对粘合的粘合剂进行热处理来进行。14、15）通过这种FSP途径，还证明了具有不同合金成分的FG Al泡沫可以通过粘结含有不同Al合金的前体而容易地制造。16）可以预期，可以实现具有不同合金成分的FG Al泡沫，其表现出与泡沫中的每种Al合金相对应的受控变形行为和压缩性能。此外，还可以实现其他性能，例如表面的耐腐蚀性和内部的高能量吸收。采用FSP法制备了由高耐蚀性纯Al（A1050）和高强度Al-Si-Cu合金（ADC 12）组成的FG-Al泡沫。进行压缩试验，通过与均匀A1050和ADC 12泡沫的压缩响应进行比较，来研究A1050 ADC 12 FG泡沫的压缩响应。2.实验程序
Al foam is a promising material for automobile components to improve both fuel efficiency and the safety of passengers owing to its light weight and high energy absorption.1,2) Functionally graded (FG) Al foam, in which the properties vary with the position, is expected to improve the performance of Al foam. There are several processing routes for fabricating FG Al foam, such as the casting route replication process,36) powder metallurgy route replication process,7) syntactic foam process8) and precursor process.9,10) In these processes, the variation of properties is achieved through position-dependent pore structures. Recently, a friction stir processing (FSP) route for fabricating the precursor of Al foam has been developed.11) FSP was developed from the basic principles of friction stir welding (FSW), which is a solid-state bonding process.12,13) It has been demonstrated that FG Al foam with varying pore structures can be fabricated by bonding precursors with different amounts of blowing agent added using FSW, which is carried out prior to the foaming process by heat treatment of the bonded precursor.14,15) By this FSP route, it has also been demonstrated that FG Al foam with varying alloy composition can be easily fabricated by bonding precursors containing different Al alloys.16) It is expected that FG Al foam with varying alloy composition exhibiting controlled deformation behavior and compressive properties corresponding to those of each Al alloy in the foam can be realized. In addition, other properties can be realized, for example, corrosion resistance at the surface and high energy absorption in the interior. In this study, FG Al foam consisting of pure Al (A1050) with high corrosion resistance and AlSiCu alloy (ADC12) with high strength was fabricated by the FSP route. Compression tests were conducted to investigate the compressive response of the A1050ADC12 FG foam by comparing it with those of uniform A1050 and ADC12 foams. 2. Experimental Procedure