Influence of rolling ways on microstructure of N36 zirconium alloy strip

doi:10.13251/j.issn.0254-6051.2020.11.027

Abstract

Abstract: The second phase, grain size, and micro-texture of N36 zirconium alloy strips processed through different rolling ways were investigated by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM) and electron backscattered diffraction (EBSD). The results show that the textures of N36 alloy strip are mainly consist of {0001}$\bar{1}2\bar{1}0$ and {0001}$01\bar{1}0$ basal texture, and the second phase is mainly HCP type Zr(Nb, Fe)₂ particles. With the same total hot deformation, the deformation rate changes of each hot rolling pass have a little effect on the grain size and texture of the final strip but play an important role in the size of second phase particles(SPPs). With the larger deformation rate of the first hot rolling pass, the size of SPPs in final strip are smaller. During the hot rolling, the texture composition of final strips is affected by using cross rolling process, and also the [0001] axis of Zr lattice is more inclined to parallel to the normal direction (ND) of the strips. Meanwhile the grain is more scattering rotated on the RD-TD plane. In addition, during the final rolling of final strips, a larger deformation leads to a smaller grain size and a higher degree of recrystallization, which strengthens the {0001}$\bar{1}2\bar{1}0$ texture, and weakens the {0001}$01\bar{1}0$ texture.

Key words: N36 zirconium alloy, strip, rolling, texture, EBSD

CLC Number:

TG146.4

Jia Yuzhen, Qiu Jun, Yang Zhongbo. Influence of rolling ways on microstructure of N36 zirconium alloy strip[J]. Heat Treatment of Metals, 2020, 45(11): 148-153.

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