| 钴含量对电沉积纳米晶镍钴合金组织与力学性能的影响 |
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| 引用本文： | 许伟长,戴品强,郑耀东.钴含量对电沉积纳米晶镍钴合金组织与力学性能的影响[J].中国有色金属学报,2010,20(1). |
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| 作者姓名： | 许伟长 戴品强 郑耀东 |
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| 作者单位： | 1. 福州大学,材料科学与工程学院,福州,350108
2. 福州大学,材料科学与工程学院,福州,350108;福建工程学院,材料科学与工程系,福州,350108 |
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| 基金项目： | 福建省自然科学基金资助项目，福州大学创新计划资助项目 |
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| 摘 要： | 采用脉冲电沉积技术制备钴含量在2.4%～59.3%范围内的镍钴合金.利用XRD与TEM技术对纳米晶镍钴合金的组织结构进行表征.结果表明:所有成分的纳米晶镍钴合金均为面心立方结构的单相固溶体,平均晶粒尺寸为11～24 nm,且平均晶粒尺寸随钴含量的增加而减小,镍钴合金镀态下TEM组织中观察到的晶粒尺寸与XRD测量结果一致;纳米晶镍钴合金抗拉强度为1 300～1 650 MPa,断裂伸长率为10.5%～14.5%,镍钴合金的抗拉强度与断裂伸长率均随钴含量的增加而提高;随着钴含量的不断增加,镍钴合金在单向拉伸过程中的应力诱发晶粒长大被逐渐抑制,提高加工硬化率,塑性失稳被延迟,从而提高塑性.
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| 关 键 词： | 镍钴合金 纳米晶 力学性能 晶粒长大 变形机制 |
Effect of Co content on structures and mechanical properties of electrodeposited nanocrystalline Ni-Co alloys |
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| XU Wei-chang,DAI Pin-qiang,ZHENG Yao-dong.Effect of Co content on structures and mechanical properties of electrodeposited nanocrystalline Ni-Co alloys[J].The Chinese Journal of Nonferrous Metals,2010,20(1). |
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| Authors: | XU Wei-chang DAI Pin-qiang ZHENG Yao-dong |
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| Affiliation: | XU Wei-chang1,DAI Pin-qiang1,2,ZHENG Yao-dong1 (1.College of Materials Science , Engineering,Fuzhou University,Fuzhou 350108,China,2.Department of Materials Science , Engineering,College of Fujian Engineering,China) |
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| Abstract: | Ni-Co alloys with Co content varying from 2.4% to 59.3% were prepared by pulse electrodeposition nanocrystalline.The microstructures of the nanocrystalline Ni-Co alloys were characterized by XRD and TEM.The analysis of XRD indicates that nanocrystalline Ni-Co alloys are all face-centered cubic structure,single-phase solid solution with an average grain size in the range of 11-24 nm,and the average grain size decreases with increasing Co content.The grain size observed in the TEM structures of as-deposited N... |
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| Keywords: | Ni-Co alloy nanocrystalline mechanical property grain growth deformation mechanism |
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