The effect of pre-compressed deformation on precipitation behavior of Zr-Sn-Nb-Fe-Cr-Cu alloy during aging
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College of Materials Science and Engineering,Chongqing University,Chongqing,China
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Abstract:
The precipitation behavior of second phase particles (SPPs) of Zr-Sn-Nb-Fe-Cr-Cu alloy after 6% and 12% pre-compressed deformation during aging was investigated by scanning electron microscope (SEM) and transmission electron microscope (TEM). It was found that the pre-deformation has a marked influence on precipitation behavior of Zr alloy. The average size of SPPs of 12% pre-compressed deformation samples was about 10nm larger than that of 6% pre-compressed deformation; and the average size of SPPs was linearly inversely proportional to the volume fraction of pre-deformation when the alloy was aging at 600℃. From TEM observation, the precipitates of orthorhombic Zr3Fe containing Cu element were detected when Zr alloys were aged at 550℃ for 30 minutes; the precipitates of hexagonal Zr(Fe,Nb)2 were also found with smaller size to Zr3Fe when the aging time prolonged to 1800 minutes. The pre-deformation has no remarkable impact on the type of SPPs.
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[Luan Baifeng, Hao Shaoyan, Wu Weiran, Li Shuo. The effect of pre-compressed deformation on precipitation behavior of Zr-Sn-Nb-Fe-Cr-Cu alloy during aging[J]. Rare Metal Materials and Engineering,2019,48(8):2523~2530.] DOI:[doi]