Structure and consolidation of rapidly solidified Meso 10 alloy flakes

被引：5
|
作者：
Blaz, L. [1 ]
Sugamata, M. [2 ]
Wloch, G. [1 ]
Sobota, J. [1 ]
Kula, A. [1 ]
机构：
[1] AGH Univ Sci & Technol, Dept Struct & Mech Solids, Krakow, Poland
[2] Nihon Univ, Coll Ind Technol, Chiba, Japan
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 506卷 / 01期
关键词：
Powder metallurgy; AA7000 aluminum alloy; Rapid solidification; Extrusion; TEM; SAD pattern analysis; Quasicrystals; AL-SI ALLOYS; TRANSMISSION ELECTRON-MICROSCOPY; SERIES ALUMINUM-ALLOYS; MECHANICAL-PROPERTIES; MICROSTRUCTURAL EVOLUTION; COMPOSITES; PRECIPITATION; WHISKERS; NANOPARTICLES; PARTICLES;
D O I：
10.1016/j.jallcom.2010.06.173
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：
Hot compression tests were carried out on rapidly solidified (RS) and KOBO-extruded Meso 10 alloy (AA7000 series), in a range of temperatures between 293 K and 773 K. The flow stress was higher than that of as-extruded industrial 7N01 alloy with a composition close to AA7039. Structural observations revealed an uncommon structure of the rapidly solidified Meso 10 alloy. Fine Zn-rich particles, 20-180 nm in size, were observed in RS-flakes. The crystallographic structure of the particles does not resemble the structures of eta', eta, or T-phases that are commonly reported for age-hardenable AA7000 series alloys. Hot deformation and prolonged ageing of as-extruded material result in a transformation of the RS structure into one that is typical for AA7000 series alloys. For comparison, structural observations on RS-material produced by commonly used direct hot-extrusion that involves the preheating of the charge at 673 K were also performed. Effect of the processing path on materials properties is discussed. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：179 / 187
页数：9
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