Dissolution of the θ′ precipitates in an Al-1.7at. % Cu alloy deformed by equal-channel angular pressing

被引：0
|
作者：
Murayama, M [1 ]
Hono, K [1 ]
Horita, Z [1 ]
机构：
[1] Natl Res Inst Met, Tsukuba, Ibaraki 3050047, Japan
来源：
ULTRAFINE GRAINED MATERIALS | 2000年
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中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructural evolution during the equal channel angular (ECA) pressing process of an alpha+ theta' two-phase Al-1.7at.%Cu alloy has been studied by transmission electron microscopy (TEM) and energy-filtered transmission electron microscopy (EF-TEM). The theta' precipitates are fragmented into fine particles after a few passes of ECA perssing. The theta' precipitates are almost completely dissolved after 8 passes of the ECA pressing, and nearly single phase cc with a fine grain size of approximately 500 nm is obtained. The dissolution process of the theta' precipitates and the distribution of Cu atoms during the severe plastic deformation have been observed by energy-filtered TEM.
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页码：145 / 153
页数：9
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