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author:

Wang, Wenweijiao (Wang, Wenweijiao.) [1] | Wang, Jian (Wang, Jian.) [2] | Li, Shangjin (Li, Shangjin.) [3] | Wang, Chen (Wang, Chen.) [4] (Scholars:王晨) | Zhou, Jianhui (Zhou, Jianhui.) [5] | Zeng, Jiawei (Zeng, Jiawei.) [6] | Tan, Wenlong (Tan, Wenlong.) [7] | Wang, Bingshu (Wang, Bingshu.) [8] (Scholars:汪炳叔)

Indexed by:

EI Scopus SCIE

Abstract:

In this paper, the effects of Nb addition on the mechanical properties, electrical conductivity and microstructure of the Cu-Ni-Si-Mg alloy were investigated. The results show that, after the secondary aging at 460 degrees C for 120 min, the alloy with 0.2 wt% Nb exhibits the best comprehensive properties with a hardness of 245.9 HV, a tensile strength of 747.28 MPa, a breaking elongation of 8.6%, and an electrical conductivity of 47.74 %IACS. The addition of Nb element can promote the precipitation of Ni2Si phase. The Nb-doped alloy has a higher quantity of precipitates and a smaller size of precipitates. The Nb element promotes the transition of the Ni2Si phase from a coherent to an incoherent relationship with the matrix in the Cu-Ni-Si-Mg alloy. In the initial stage of precipi-tation, the precipitation activation energy of the alloy with 0.2 wt% Nb is 46.86% lower than that of the alloy without Nb. The addition of Nb increases the proportion of sigma 3n (n = 1, 2, 3) grain boundary in the Cu-Ni-Si-Mg alloy. Furthermore, after the secondary aging, the Nb addition increases the recrystallized texture and recrys-tallized grains and decreases the cold-rolled texture and defects in the alloy.

Keyword:

Aging Cu-Ni-Si-Mg-Nb alloy Precipitates Precipitation kinetics

Community:

  • [ 1 ] [Wang, Wenweijiao]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 2 ] [Wang, Jian]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 3 ] [Li, Shangjin]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 4 ] [Wang, Chen]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 5 ] [Wang, Bingshu]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 6 ] [Zhou, Jianhui]Fujian Zijin Copper Co Ltd, Longyan 517499, Fujian, Peoples R China
  • [ 7 ] [Zeng, Jiawei]Fujian Zijin Copper Co Ltd, Longyan 517499, Fujian, Peoples R China
  • [ 8 ] [Tan, Wenlong]Fujian Zijin Copper Co Ltd, Longyan 517499, Fujian, Peoples R China
  • [ 9 ] [Wang, Chen]Fuzhou Univ, Coll Mat Sci & Engn, 2 Xue Yuan Rd,Univ Town, Fuzhou 350108, Fujian, Peoples R China

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Source :

MATERIALS CHARACTERIZATION

ISSN: 1044-5803

Year: 2022

Volume: 194

4 . 7

JCR@2022

4 . 8 0 0

JCR@2023

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:91

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 14

SCOPUS Cited Count: 14

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 3

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