Improvement of elevated temperature mechanical properties of Cu-Ni-Sn-Pb alloys

被引：9
作者：
Empl, D. [1 ]
Laporte, V. [1 ]
Vincent, E. [2 ]
Dewobroto, N. [2 ]
Mortensen, A. [1 ]
机构：
[1] Ecole Polytech Fed Lausanne, Inst Mat, Stn 12, Lab Mech Met, CH-1015 Lausanne, Switzerland
[2] Swissmet Ind Ltd, CH-4143 Dornach 1, Switzerland
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 16-17期
关键词：
Non-ferrous alloys; Phase transformation; Copper; Warm-shortness; COPPER-CHROMIUM ALLOYS; DYNAMIC EMBRITTLEMENT; GRAIN-BOUNDARY; HOT DUCTILITY; INTERGRANULAR FRACTURE; NICKEL-ALLOYS; LIQUID-METAL; BASE ALLOYS; PHOSPHORUS; ZIRCONIUM;
D O I：
10.1016/j.msea.2010.03.056
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Cu-Ni-Sn alloys with Pb additions exhibit high mechanical strength at room temperature coupled with good machinability but experience a significant ductility loss above the melting point of lead. We explore here the influence of minor additions of Al, Mn, Zr, B or P to the copper alloy CuNi9Sn6Pb1 on its tensile properties at 400 degrees C and 10(-2) s(-1). Only boron and phosphorous additions have a clear beneficial effect. Unlike other elements tested, these form intermetallic particles; it is proposed that the improvement results from a combination of capillary pinning and mechanical shielding by these particles of the molten lead inclusions in the alloy. (C) 2010 Elsevier B.V. All rights reserved.
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收藏
页码：4326 / 4333
页数：8
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