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EFFECTS OF DOUBLE EXTRUSION ON THE MICROSTRUCTURE AND TENSILE PROPERTY OF THE PM PROCESSED SiCp/2009Al COMPOSITES
Liu Zhenyu; Wang Quanzhao; Xiao Bolue; Ma Zongyi; Liu Yue
Corresponding AuthorXiao Bolue(blxiao@imr.ac.cn)
2010-09-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume46Issue:9Pages:1121-1127
AbstractPowder metallurgy (PM), as an important method of fabricating SiC particle reinforced aluminum matrix (SiCp/Al) composites, has advantages in obtaining good interfacial bonding and enhancing tensile strength over casting or infiltrating method. The primary process of the PM method involves mixing, compaction and subsequent secondary plastic deformation. Especially, secondary plastic deformation is an important process to destroy the oxidation film on the Al particle surfaces and enhance Al-SiC bonding. However, the incorporation of the SIC particles restricts plastic flow ability of the composite and makes it difficult to be subjected to heavy single-step plastic deformation, such as single hot extrusion, hot rolling or hot forging. Instead, multi-step deformation is a critical processing approach for the SiCp/Al composites with low deformability. However, the previous attentions were mostly focused on single-step processing, multi-step plastic deformation of the SiCp/Al composites was seldom discussed. In this paper, 20%SiCp/2009Al (volume fraction) composite was fabricated using a common PM method and the effects of double extrusion on the microstructure and tensile property of the composite were investigated. It is indicated that the double extrusion could refine the SiCp size, align the SiCp and increase the aspect ratio of the SiCp, but did not exert critical effects of the grain size and < 111 > texture of the matrix. However, the average distance between the SiCp along the extrusion direction increased after the double extrusion, more easily inducing a SiCp-poor band which aligned approximately perpendicularly to the extrusion direction. This resulted in a decrease in the strength and an increase in the elongation along the extrusion direction.
Keywordpowder metallurgy composite aluminum alloy double extrusion SiCp-poor band
DOI10.3724/SP.J.1037.2010.00207
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000282804800016
PublisherSCIENCE PRESS
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/103103
Collection中国科学院金属研究所
Corresponding AuthorXiao Bolue
AffiliationChinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Liu Zhenyu,Wang Quanzhao,Xiao Bolue,et al. EFFECTS OF DOUBLE EXTRUSION ON THE MICROSTRUCTURE AND TENSILE PROPERTY OF THE PM PROCESSED SiCp/2009Al COMPOSITES[J]. ACTA METALLURGICA SINICA,2010,46(9):1121-1127.
APA Liu Zhenyu,Wang Quanzhao,Xiao Bolue,Ma Zongyi,&Liu Yue.(2010).EFFECTS OF DOUBLE EXTRUSION ON THE MICROSTRUCTURE AND TENSILE PROPERTY OF THE PM PROCESSED SiCp/2009Al COMPOSITES.ACTA METALLURGICA SINICA,46(9),1121-1127.
MLA Liu Zhenyu,et al."EFFECTS OF DOUBLE EXTRUSION ON THE MICROSTRUCTURE AND TENSILE PROPERTY OF THE PM PROCESSED SiCp/2009Al COMPOSITES".ACTA METALLURGICA SINICA 46.9(2010):1121-1127.
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