EFFECT OF HEAT TREATMENT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF EXTRUDED SiC/6061 COMPOSITE

被引：4

作者：

Glogovsky, Miroslav ^{[1
]}

Fujda, Martin ^{[1
]}

Vojtko, Marek ^{[1
]}

Zubko, Pavol ^{[1
]}

Skrobian, Milan ^{[2
]}

机构：

[1] Tech Univ Kosice, Fac Met, Kosice, Slovakia

[2] Sapa Profily As, Ziar Nad Hronom, Slovakia

来源：

ACTA METALLURGICA SLOVACA | 2015年 / 21卷 / 01期

关键词：

particulate reinforced composite; SiC; extrusion; mechanical properties; fracture;

D O I：

10.12776/ams.v21i1.547

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effect of heat treatment on microstructure and mechanical properties of extruded SiC/6061 aluminium alloy matrix composite was investigated. The heat treatment (annealing at 540 degrees C for 1.5 hours, water quenching and artificial aging at 170 degrees C for 7 hours) caused dissolution of Mg2Si particles and decomposition of small SiC particles. The 0.2 % yield strength and the ultimate tensile strength of extruded composite were increased by application of heat treatment due to precipitation of beta' ' phase particles. On the other hand, the ductility of composite was decreased. The fracture surface of as-extruded composite was consisted of numerous dimples. It was a result of micro voids nucleation at interface between matrix and SiC particles and second-phase particles. The fracture of heat treated composite was similar, micro voids were nucleated mainly on SiC particles, which were cracked during tensile test .

引用

页码：35 / 43

页数：9

共 29 条

[11] Effect of Precipitation on Development of Recrystallization Texture in a 6061 Aluminum Alloy [J].