超高强7090/SiCP复合材料的组织和性能
Microstructure and Mechanical Properties of Ultra High Strength 7090/SiCP Composite
摘 要
对喷射共沉积7090/SiCP复合材料坯经过挤压及不同热处理后棒材的微观组织和力学性能进行了研究,对其热处理工艺进行了确定.结果表明：复合材料坯经挤压后组织细小均匀,SiC颗粒均匀分布；采用470 ℃×1 h+490 ℃×1 h的双级固溶处理及120 ℃×28 h时效后,挤压棒材的抗拉强度可达785 MPa,弹性模量超过100 GPa；双级固溶＋时效复合材料的力学性能明显优于单级固溶+时效态的力学性能；复合材料的断裂主要是由SiC颗粒断裂和界面脱粘引起.
快速凝固
喷射共沉积
超高强铝合金
Al matrix composite
rapid solidification
spray co-deposition
ultra high strength Al alloy
Abstract
The microstructure and mechanical properties of the extruded and different heat-treated bars of spray co-deposited 7090/SiCP composite were studied and the heat treatment process was determined.The extruded composite presented fine microstructure and uniformly distributed SiC particles.Under the condition of 470 ℃×1 h+490 ℃×1 h dual solid-solution and 120 ℃×28 h ageing,the tensile strength and modulus of the composite could reach 785 MPa and 100 GPa respectively.The mechanical properties of the dual solid-solution treated composite were more excellent than those of single solid-solution treated composites.The fracture of the composite mainly resulted from the SiC particles breakage and Al/SiC interfacial debonding.
中图分类号 TG146.2 TB333
所属栏目
基金项目 湖南省科技厅重点资助项目(02Gky2004)
收稿日期 2005/8/24
修改稿日期 2006/1/20
网络出版日期
作者单位点击查看
备注袁武华(1973-),男,湖南长沙人,副教授.
引用该论文: YUAN Wu-hua,ZHANG Jian,CHEN Zhen-hua,LIU Bin. Microstructure and Mechanical Properties of Ultra High Strength 7090/SiCP Composite[J]. Materials for mechancial engineering, 2006, 30(9): 39～43
袁武华,张健,陈振华,刘斌. 超高强7090/SiCP复合材料的组织和性能[J]. 机械工程材料, 2006, 30(9): 39～43
被引情况:
【1】冯朝辉,苏海,高文理,卢健,陆政, "喷射共沉积SiCp/2024铝基复合材料轧板的显微组织及力学性能",机械工程材料 33, 86-89(2009)
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参考文献
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【3】陈振华,黄培云,蒋向阳,等.多层喷射沉积规律[J].中国有色金属学报,1995,5(4):70-72.
【4】Frank Su Y-H,Chen Y C,Chi Y A Tsao.Workability of spray-formed 7075 Al alloy reinforced with SiCp at elevated temperatures[J].Materials Science and Engineering A,2004,364:296-304.
【5】陈绍康.LC4合金低熔点共晶相组成及固溶变化[J].铝加工,1994,17(6):18-23.
【6】Ludtka G M,Laughlin D E.The influence of microstructure and strength on the fracture mode and toughness of 7xxx series aluminum alloys[J].Metall Trans,1982,13A(3):411-414.
【7】CHEN Kang-hua,HUANG Lan-ping.Strengthening-toughening of 7××× series high strength aluminum alloys by heat treatment[J].Trans Nonferrous Met Soc China,2003,13(3):484-490.
【8】王洪斌,刘慧敏,黄进峰,等.热处理对喷射成形超高强Al-Zn-Mg-Cu系铝合金的影响[J].中国有色金属学报,2004,14(3):398-404.
【9】Bruce M,Claire M,Ravi S,et al.The influence of Al3Zr dispersoids on the recrystallization of hot-deformed AA7010 alloys[J].Metallurgical and Materials Transactions A,2001,32(3):625-632.
【10】Wang S H,Uan J Y,Lui T S,et al.Examination on the aging and tensile properties of Al-Zn-Mg/Al3Ni eutectic composite[J].Metallurgical and Materials Transactions A,2002,33(3):707-711.
【11】袁武华.喷射沉积轻量化材料的研制——高性能7075/SiCP复合材料、8009合金板材的制备及应用研究[R].长沙:湖南大学,2005.77-79.
【12】Bhaduri A,Gopinathan V,Ramarkrishnan P,et al.Processing and properties of SiC particulate reinforced Al-6.2Zn-25Mg-1.7Cu alloy (7010)matrix composites prepared by mechanical alloying[J].Materials Science and Engineering A,1996,221:94-101.
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