Effects of Mg content on aging behavior of sub-micron Al_2O_(3p)/Al-Cu-Mg composites  

Effects of Mg content on aging behavior of sub-micron Al_2O_(3p)/Al-Cu-Mg composites

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作  者:姜龙涛 朱德智 陈国钦 修子扬 武高辉 

机构地区:[1]School of Materials Science and Technology,Harbin Institute of Technology,Harbin 150001,China

出  处:《中国有色金属学会会刊:英文版》2006年第A03期1557-1561,共5页Transactions of Nonferrous Metals Society of China

基  金:Project(50071019) supported by the National Natural Science Foundation of China;Project(HIT2002.34) supported by the Science Research Foundation of Harbin Institute of Technology, China

摘  要:30%Al2O3p/Al-Cu-2.0Mg composite and Al2O3p/Al-Cu-2.5Mg composite with 0.3μm-Al2O3 particles were fabricated. Age-hardening behaviors of two composites and the related matrix alloys were studied by means of Brinell-hardness measurement, DSC and TEM. The results show that the hardness of the composite is improved obviously because of the addition of sub-micron Al2O3 particles. But the hardness increment of Al2O3p/Al composite after aging is lower than that of the related matrix alloy. Moreover, the formation of GP region is suppressed by the addition of sub-micron Al2O3 particles, which broadens the exothermic peak of S' phase. The increment of Mg content has a different influence on accelerating the aging processes of aluminum alloys and the composites, and the hardness also increases.30%Al2O3p/Al-Cu-2.0Mg composite and Al2O3p/Al-Cu-2.5Mg composite with 0.3 μm-Al2O3 particles were fabricated. Age-hardening behaviors of two composites and the related matrix alloys were studied by means of Brinell-hardness measurement, DSC and TEM. The results show that the hardness of the composite is improved obviously because of the addition of sub-micron Al2O3 particles. But the hardness increment of Al2O3p/Al composite after aging is lower than that of the related matrix alloy. Moreover, the formation of GP region is suppressed by the addition of sub-micron Al2O3 particles, which broadens the exothermic peak of S' phase. The increment of Mg content has a different influence on accelerating the aging processes of aluminum alloys and the composites, and the hardness also increases.

关 键 词: 铝合金 金相 时效行为 

分 类 号:TB331[一般工业技术—材料科学与工程]

 

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