Aging microstructural characteristics of ZA-27 alloy and SiCp/ZA-27 composite

被引：12

作者：

Li, ZQ ^{[1
]}

Zhou, HZ ^{[1
]}

Luo, XY ^{[1
]}

Wang, T ^{[1
]}

Shen, K ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2006年 / 16卷 / 01期

关键词：

SiCp/ZA-27; composite; aging microstructure; ZA-27; alloy; precipitation; crystallographic orientation relationship;

D O I：

10.1016/S1003-6326(06)60017-4

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The aging characteristics of as-quenched microstructures of ZA-27 alloy and SiCp/ZA-27 composite(ZMCp) were investigated using SEM, EDS and TEM. The structure, morphology and size of sub-grains in primary dendrite in ZMCP continuously change during aging process. Little tiny spherical Zn-rich eta phase distributes in the dendrite. Amount of transitional a' phase, well coherent with equilibrium a(f) phase, in SiCp-neighboring dendrite edge zone is less than that in dendrite center zone. Both eutectic and peritectic beta phase transform into lamellar a and eta phases, obeying [2113](eta)//[110](a), and (002)(a)// (1 (1) over bar 01), In the like-eutecticum of ZMC(p) less amount of beta phase and decomposition products are found. The size of a phase decomposed from peritectic, beta phase in ZMCp is obviously larger than that in the monolithic alloy. The lamella decomposition of, beta phase beside SiCP is evidently more rapid than that in the alloy. SiC particulates strongly accelerate neighboring beta phase decomposition in aging process.

引用

页码：98 / 104

页数：7

共 25 条

[21]

Xu X. L., 2001, ACTA METALL SIN, V14, P109

[22] An experimental study on deformation behavior below 0.2% offset yield stress in some SiCp/Al composites and their unreinforced matrix alloys [J].

Zhang, F ;

Sun, PF ;

Li, XC ;

Zhang, GD .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 300 (1-2) :12-21

[23] Aging behavior of squeeze cast SiCw/AZ91 magnesium matrix composite [J].

Zheng, MY ;

Wu, K ;

Kamado, S ;

Kojima, Y .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 348 (1-2) :67-75

[24] Thermal failure mechanism and failure threshold of SiC particle reinforced metal matrix composites induced by laser beam [J].

Zhou, YC ;

Long, SG ;

Liu, YW .

MECHANICS OF MATERIALS, 2003, 35 (10) :1003-1020

[25]

ZHU YH, 1990, J MATER SCI, V32, P125

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