Superplasticity of nanostructured nickel alloy and composite fabricated by electrodeposition

Q3 Materials Science
Wang Yong
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引用次数: 0

Abstract

A nanostructured nickel alloy and a Ni/Si3N4(w) composite were fabricated by pulse current electrodeposition,and their superplastic tensile deformation behaviors were investigated at strain rates ranging from 1×10?3 to 2×10?2 s?1 and temperatures ranging from 673 to 823 K.Optimal superplastic condition and the maximum elongation were determined.The results show that the maximum elongation of Ni-Co alloy can reach the value of 279% at strain rate of 5×10?3 s?1 and temperature 773 K,the maximum elongation of Ni/ Si3N4(w) composite is 635% at strain rate of 1×10?2 s?1 and temperature 713 K.Scanning electron microscopy and transmission electron microscopy were employed to examine the microstructures of the as-deposited and deformed samples.The superplastic behavior of the alloy and composite were compared with and discussed in terms of their grain growth behavior and accommodation mechanisms.
电沉积纳米镍合金及复合材料的超塑性研究
采用脉冲电流电沉积法制备了纳米结构镍合金和Ni/Si3N4(w)复合材料,研究了它们在应变速率1×10?3到2×10?2 s ?温度范围从673到823 K。确定了最佳超塑性条件和最大伸长率。结果表明:Ni-Co合金在应变速率为5×10?3 s ?温度为773 K时,Ni/ Si3N4(w)复合材料在应变速率为1×10?2 s ?温度为713 K。采用扫描电镜和透射电镜对沉积态和变形态试样的显微组织进行了观察。对合金和复合材料的超塑性行为进行了比较,并从晶粒生长行为和调节机制方面进行了讨论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
1.70
自引率
0.00%
发文量
1
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