Mechanical and functional properties of ultrafine grained Al wires reinforced by nano-Al2O3 particles

被引：44

作者：

Casati, R. ^{[1
]}

Wei, X. ^{[2
]}

Xia, K. ^{[2
]}

Dellasega, D. ^{[3
]}

Tuissi, A. ^{[4
]}

Villa, E. ^{[4
]}

Vedani, M. ^{[1
]}

机构：

[1] Politecn Milan, Dept Mech Engn, I-20156 Milan, Italy

[2] Univ Melbourne, Dept Mech Engn, Melbourne, Vic 3010, Australia

[3] Politecn Milan, Dept Energy, I-20133 Milan, Italy

[4] CNR, IENI, I-23900 Lecce, Italy

来源：

MATERIALS & DESIGN | 2014年 / 64卷

关键词：

Aluminum matrix nanocomposite; Nano-particle; Damping; Ultrafine grained material; Powder metallurgy; METAL-MATRIX COMPOSITES; DAMPING BEHAVIOR; PURE ALUMINUM; IN-SITU; NANOCOMPOSITES; CONSOLIDATION; FABRICATION; POWDERS; SIZE;

D O I：

10.1016/j.matdes.2014.07.052

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A powder metallurgy route based on high-energy ball milling, powder consolidation by hot extrusion and cold rolling was used to produce Al composite wires reinforced with Al2O3 nanoparticles. The process was capable of preparing fully dense nanocomposites characterized by well dispersed nanoparticles in a ultrafine grained matrix. Ball milling led to the fragmentation of the passivation oxide layer that covers the aluminum particles and of the alumina particle clusters added ex-situ in addition to embedding these nano-sized particles in the Al matrix and thus producing optimal precursors for subsequent consolidation. The nanocomposites showed improved mechanical performances in term of hardness and tensile strength. They also exhibited excellent damping behavior at high temperatures. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：102 / 109

页数：8

共 32 条

[1]

Ahmad Z., 2012, Aluminium Alloys: New Trends in Fabrication and Applications

[2] DISLOCATION GENERATION DUE TO DIFFERENCES BETWEEN THE COEFFICIENTS OF THERMAL-EXPANSION [J].