Short-range ordering in a commercial Ni-Cr-Al-Fe precision resistance alloy

被引：29
|
作者：
Wang, Yong [1 ,2 ]
Jiang, Dingcheng [1 ]
Yu, Wenxin [3 ]
Huang, Shudong [1 ]
Wu, Da [3 ]
Xu, Yonghong [3 ]
Yang, Xianjun [3 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400045, Peoples R China
[2] Chongqing Univ, Int Joint Lab Light Alloys MOE, Chongqing 400045, Peoples R China
[3] Chongqing Chuanyi Metall Funct Mat Co Ltd, Chongqing 400702, Peoples R China
来源：
MATERIALS & DESIGN | 2019年 / 181卷
基金：
国家重点研发计划;
关键词：
L1(2) short-range order; Precision resistance alloy; Microdomain; K-state; Transmission electron microscope; ELECTRICAL-RESISTIVITY; K-STATE; PRECIPITATION; SIMULATIONS; HRTEM;
D O I：
10.1016/j.matdes.2019.107981
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Short-range order has been thought to be the primary reason of the abnormal increase of electrical resistivity after aging treatment in the Ni-20Cr based precision resistance alloys. However, there is no report on the microstructures of this alloy, to say nothing of the lattice type of the short-range order. In this work, the microstructure of a commercial Ni-20Cr-3.2Al-2.5Fe precision resistance alloy was investigated using X-ray diffraction, transmission electron microscopy and atom probe tomography techniques. A random solid solution was initially formed after quenching treatment. Short-range order with the L1(2)-type structure, which was formed due to aging treatment, resulted in a decrease in lattice parameter and an increase in electrical resistivity. The short-range order microdomains distributed in a random matrix coherently with the same composition. (C) 2019 The Authors. Published by Elsevier Ltd.
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页数：9
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