Effect of Lanthanum Microalloying on Microstructure and Properties of As-Cast Cu-Ni-Si Alloy

被引：0

作者：

Liu J. ^{[1
,2
]}

Wu A. ^{[1
]}

Wang S. ^{[2
]}

Chen S. ^{[2
]}

Zhang M. ^{[2
]}

Song H. ^{[2
]}

Zhang S. ^{[2
]}

机构：

[1] School of Material Science and Engineering, Shenyang Ligong University, Shenyang

[2] Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang

来源：

Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2023年 / 41卷 / 05期

关键词：

as-cast microstructure; corrosion resistance; Cu-Ni-Si alloy; mechanical properties; rare earth microalloying;

D O I：

10.11785/S1000-4343.20230510

中图分类号：

学科分类号：

摘要：

The effects of rare earth La on the microstructure，mechanical properties and corrosion resistance of a Cu-Ni-Si alloy（C7025）were studied by means of optical metallography，energy spectrum analysis，electron backscatter diffraction，tensile test and electrochemical test. The results show that addition of appropriate La content can obviously refine the as-cast structure，with the increase of La content，the morphology of second phase in the matrix changes from granular shape to long strip and distributed along grain boundary. The yield strength and tensile strength of the alloy can be improved by adding proper amount of La. The yield strength and tensile strength can reach 322.2 and 444.8 MPa respectively with adding 0.044% La. Meanwhile，it is founded that the addition of La results in an unique M-shape relation between La contents and yield/tensile strength；The minimum average grain size is 95.3 μm as the addition amount is 0.17%；Furthermore，the addition of La can improve the corrosion resistance of the alloy，which can be the best as the addition amount is 0.17%. © 2023 Chinese Society of Rare Earths. All rights reserved.

引用

页码：930 / 941

页数：11

共 25 条

[1] Zhang P, Li Y P，, Lei Q，, Tan H，, Shi R K，, She J L，, Li S Y，, Zhu J L，, Sheng X F，, Zhang J，, Li Z., Microstructure and mechanical properties of a Cu-Ni-Ti alloy with a large product of strength and elongation [J], J. Mater. Res, 1221, (2020)
[2] Bouquerel J, Delbove M, Vogt J B., Advanced processing of EBSD data to distinguish the complex microstructure evolution of a Cu-Ni-Si alloy induced by fatigue [J], Mater. Charact, 145, (2018)
[3] Jia Y L, Wang M P，, Chen C，, Dong Q Y，, Wang S, Li Z., Orientation and diffraction patterns of δ-Ni<sub>2</sub>Si precipitates in Cu-Ni-Si alloy [J], J. Alloys Compd, 557, (2013)
[4] Wang W Y，, Zhu J L, Qin N N, Zhang Y F, Li S Y，, Xiao Z, Li Z., Effect of minor rare earth on the microstructure and properties of Cu-Cr-Zr alloy[J], J. Alloys Compd, 847, (2020)
[5] Liu S F, Luo L M, Zhou J P，, Lu X G, Cheng X M, Han J Q., Effect of yttrium addition on as-cast microstructure and properties of 6063 aluminum conductors [J], Journal of the Chinese Society of Rare Earths, 36, 2, (2018)
[6] Ru L J, Li W Y, Li W S, Li Y M., Effects of tace cerium addition on microstructure and properties of Cu0.9%Cr alloy [J], Journal of the Chinese Society of Rare Earths, 36, 5, (2018)
[7] Hu G Y，, Zhu C J, Xu D F，, Dong P X, Chen K H., Effect of cerium on microstructure，mechanical properties and corrosion properties of Al-Zn-Mg alloy[J], J. Rare Earths, 39, 2, (2021)
[8] Li J L, Chang L L, Li S L, Zhu X D，, An Z X., Microstructure and properties of as-cast Cu-Cr-Zr alloys with lanthanum addition [J], J. Rare Earths, 36, (2018)
[9] Guo F A, Xiang C J，, Yang C X，, Cao X M, Mu S G, Tang Y Q., Study of rare earth elements on the physical and mechanical properties of a Cu-Fe-P-Cr alloy [J], Mater. Sci. Eng, 147, (2008)
[10] Chen Y, Cheng M, Song H W, Zhang S H, Liu J S, Zhu Y., Effect of lanthanum addition on microstructure and mechanical properties of as-cast pure copper[J], J. Rare Earth, 32, 11, (2014)

← 1 2 3 →