Microstructure evolution and mechanical properties of Al-Zn-Mg-Cu alloy reprocessed by spray-forming and heat treated at peak aged condition

被引：71

作者：

Mazzer, E. M. ^{[1
]}

Afonso, C. R. M. ^{[2
]}

Galano, M. ^{[3
]}

Kiminami, C. S. ^{[2
]}

Bolfarini, C. ^{[2
]}

机构：

[1] Univ Fed Sao Carlos, Programa Posgrad Ciencia & Engn Mat, BR-13565905 Sao Carlos, SP, Brazil

[2] Univ Fed Sao Carlos, Dept Engn Mat, BR-13565905 Sao Carlos, SP, Brazil

[3] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 579卷

关键词：

Aluminum alloys; 7000; series; Spray forming; Aluminum processing; PRECIPITATION; PHASE;

D O I：

10.1016/j.jallcom.2013.06.055

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Machining chips of the alloy AA7050 were reprocessed by spray forming followed by hot-extrusion and heat treatment. The spray-formed deposit presented a microstructure with hardening eta' precipitates within the matrix and equilibrium eta' precipitates at the grain boundaries, refined grains and low segregation of the main elements Zn, Cu and Mg. The final microstructure at peak aged condition is mainly composed by Guinier-Preston (GP) zones, eta' metastable, eta equilibrium, Al3Zr dispersoids and the coarse Al7Cu2Fe intermetallic. A well-defined precipitation free zone along grain boundaries was not observed. Good mechanical properties were achieved. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：169 / 173

页数：5

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