Strong and ductile particulate reinforced ultrafine-grained metallic composites fabricated by flake powder metallurgy

被引：98

作者：

Kai, Xizhou ^{[1
]}

Li, Zhiqiang ^{[1
]}

Fan, Genlian ^{[1
]}

Guo, Qiang ^{[1
]}

Tan, Zhanqiu ^{[1
]}

Zhang, Wenlong ^{[1
]}

Su, Yishi ^{[1
]}

Lu, Weijie ^{[1
]}

Moon, Won-Jin ^{[2
]}

Zhang, Di ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[2] Basic Sci Inst Gwangju Ctr, Kwangju 500757, South Korea

来源：

SCRIPTA MATERIALIA | 2013年 / 68卷 / 08期

关键词：

B4C/Al composite; Strain hardening; Dispersoid; Ductility; Flake powder metallurgy; MECHANICAL-PROPERTIES; MATRIX COMPOSITES; SIC PARTICLES; ALUMINUM; DEFORMATION; B4C; MICROSTRUCTURE; RESISTANT; EVOLUTION; STRENGTH;

D O I：

10.1016/j.scriptamat.2012.11.024

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A strategy of nanodispersion toughening is utilized to improve the ductility in micron particulate-reinforced aluminum composites, which involves increasing the strain hardening rate by introducing Al2O3 nanodispersoids into the ultrafine-grained (UFG) matrix using flake powder metallurgy. The as-fabricated B4C/UFG Al(Al2O3) exhibits simultaneous enhancement in tensile plasticity (8.9%) and strength (364 MPa) compared with its counterpart without the nanodispersoids. Thus, nanodispersion toughening promises an easy but effective pathway to optimize the strength and ductility of particulate-reinforced UFG metallic composites. (c) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：555 / 558

页数：4

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