东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (3): 383-387.DOI: 10.12068/j.issn.1005-3026.2015.03.018

• 材料与冶金 • 上一篇    下一篇

5083铝合金表面化学镀Ni-P镀层的力学性能

任桂华, 张滨   

  1. (东北大学 材料各项异性与织构教育部重点实验室, 辽宁 沈阳110819)
  • 收稿日期:2014-06-06 修回日期:2014-06-06 出版日期:2015-03-15 发布日期:2014-11-07
  • 通讯作者: 任桂华
  • 作者简介:任桂华(1968-),女,山东青岛人,东北大学访问学者,湖北理工学院副教授; 张滨(1965-),女,辽宁沈阳人,东北大学教授.
  • 基金资助:
    国家自然科学基金资助项目(51171045,51371047).

Mechanical Properties of Ni-P Coatings Prepared by Electroless Plating on Surface of 5083 Aluminum Alloy

REN Gui-hua, ZHANG Bin   

  1. Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China.
  • Received:2014-06-06 Revised:2014-06-06 Online:2015-03-15 Published:2014-11-07
  • Contact: ZHANG Bin
  • About author:-
  • Supported by:
    -

摘要: 采用化学镀方法在5083铝合金基体上制备了Ni-P非晶薄膜,采用纳米压痕技术在不同应变速率下研究Ni-P非晶薄膜的硬度、弹性模量和变形行为.结果表明,Ni-P非晶薄膜硬度不是一个恒定值,与纳米压痕的压入深度有关,而弹性模量基本保持不变;载荷-深度曲线出现跳跃及台阶现象与应变速率有关,应变速率愈慢,曲线出现台阶现象越明显;跳跃台阶源于单个剪切带的开动,而在高的应变速率条件下,由于多个剪切带的开动,曲线上便不出现跳跃台阶.

关键词: Ni-P非晶薄膜, 纳米压痕, 力学性能, 硬度, 弹性模量

Abstract: Amorphous Ni-P films were prepared on 5083 aluminum alloy substrates by electroless plating. The mechanical properties of Ni-P films with different strain rates were investigated by nanoindentation tests. It was found that the hardness of Ni-P films is not constant, which depends on depth. Elastic modulus is almost invariable. Discrete displacement bursts and jumping steps in load-depth curves are associated with the loading-rate. The slower the loading rate is, the more obvious the curve steps appear. The discrete displacement burst starts from a single shear band. In a high strain rate, jumping steps do not appear on curves.

Key words: thin amorphous Ni-P films, nanoindentation, mechanical properties, hardness, elastic modulus

中图分类号: