Effect of heat treatment on the highly corrosion-resistant Cu70Ni27.7Fe2.3 alloy

被引：17
|
作者：
Zhang Jie [1 ]
Wang Qing [1 ]
Wang Yingmin [1 ]
Wen Lishi [1 ]
Dong Chuang [1 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Key Lab Mat Modificat Laser Ion & Elect Beams, Dalian 116024, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 505卷 / 02期
基金：
美国国家科学基金会;
关键词：
Cu-Ni; Heat treatment; Cluster model; Corrosion; CU-NI ALLOYS; METALLIC GLASSES; QUASI-CRYSTALS; CUPRO-NICKEL; SEA-WATER; MODEL; MICROSTRUCTURE; CLUSTERS; FE;
D O I：
10.1016/j.jallcom.2010.06.148
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：
Minor Fe additions are widely added to enhance the corrosion resistance of cupronickel alloys. The present paper aims at optimizing the amounts of Fe in Cu-70(Ni,Fe)(30) (at.%) alloys using a cluster-plus-glue-atom model for stable solid solutions. By this model, it is assumed that one Fe atom and 12 Ni atoms formed a Fe-centered and Ni-surrounded cube-octahedron cluster and the isolated FeNi12 clusters embedded in a Cu matrix. The stable solid solution alloy composition of Fe-modified Cu70Ni30 alloy was described by a cluster formula [Fe-1 Ni-12]Cu-30.3 = CU70Ni27.7Fe2.3 (at.%). The effect of homogenizing annealing treatment on the microstructure and corrosion resistance was also investigated by XRD, TEM and electrochemical corrosion measurements. The corrosion test indicates that the Cu70Ni27.7Fe2.3 alloy annealed at 800 degrees C for 5 h possesses the best corrosion resistance in 3.5% NaCI solution. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：505 / 509
页数：5
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