Effect of high temperature heat treatment on microstructure and mechanical properties of electrodeposited nickel

doi:10.13251/j.issn.0254-6051.2023.10.015

Abstract

Abstract: In order to improve its subsequent plastic deformation capacity, the effect of high temperature treatment on the microstructure and mechanical properties of electrodeposited nickel was studied by means of X-ray diffractometer (XRD), optical microscope (OM), electron backscatter diffraction (EBSD), microhardness tester and electronic universal material testing machine. The results show that the diffraction peak intensity of electrodeposited nickel (111) surface is almost the strongest after heat treatment. The starting sheet grains grow preferentially and gradually grow across the interfaces. At the same time, the electrodeposited layer grains also grow gradually and the microstructure tends to be homogenized. After high temperature heat treatment, the microhardness is decreased significantly from 185 HV0.2 to 79.1 HV0.2, with a maximum reduction of 57％. After heat treatment at 1100 ℃ for 8 h, the interface between the electrodeposited nickel starting sheet and the electrodeposited layer disappears, the overall microstructure uniformity is the best, the average tensile strength is decreased by 31.13％, while the average elongation is increased by 128.46％, showing that the high temperature heat treatment at 1100 ℃ for 8 h is the optimal process.

Key words: electrodeposited nickel, high temperature heat treatment, starting sheet, microstructure, mechanical properties

CLC Number:

TG146.1⁺5

Zhang Han, Gao Yueyue, Qiao Jisen, Xia Tiandong. Effect of high temperature heat treatment on microstructure and mechanical properties of electrodeposited nickel[J]. Heat Treatment of Metals, 2023, 48(10): 109-115.

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