Relationship between microstructure, properties and reaction conditions for Cu-TiB2 alloys prepared by in situ reaction

被引：128

作者：

Guo, Mingxing ^{[1
]}

Shen, Kun ^{[2
]}

Wang, Mingpu ^{[2
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Mat, Lab Mech Met, CH-1015 Lausanne, Switzerland

[2] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

来源：

ACTA MATERIALIA | 2009年 / 57卷 / 15期

关键词：

Particulate reinforced composites (MRC); Rapid solidification; Mechanical properties; Dislocation theory; STRENGTHENED COPPER-ALLOYS; MECHANICAL-PROPERTIES; MATRIX COMPOSITES; B ALLOYS; BEHAVIOR; DEFORMATION; PARTICLES; STABILITY; FRACTURE;

D O I：

10.1016/j.actamat.2009.06.030

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three Cu-TiB2 alloys (0.45, 1.6, 2.5 wt.% TiB2) have been prepared by a combination of in situ reaction and rapid solidification under optimized conditions. The relationship between microstructure, properties and in situ reaction condition for these Cu-TiB2 alloys was investigated and analyzed by modeling. It is shown that the distribution and size of TiB2 particles are strongly dependent on the choice of in situ reaction conditions and solute concentration; specifically, the size and aggregation level of TiB2 particles tend to increase as the volume per cent of TiB2 in the three Cu-TiB2 alloys increases when the same in situ reaction conditions are used. The forming, coarsening and aggregation models of TiB2 particles are established. The mechanical properties of three Cu-TiB2 alloys are directly related to the distribution and size of TiB2 particles, the change in the grain size and the residual solute concentration. A composite model reveals the separate contributions of these parameters to the mechanical properties. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：4568 / 4579

页数：12

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