Corrosion and fatigue in micro-sized Ni cantilever beams

摘要：

The Ni microcantilevers were fabricated by femtosecond laser.The corrosion behavior of the micro-sized Ni cantilever beams was studied by electrochemical noise and a newly developed fatigue testing method.The results show that the micro-sized specimens exhibit general corrosion behavior under the studied corrosion condition,whereas the ordinary-sized plates exhibit the localized corrosion behavior.The critical load amplitude of the micro-sized Ni specimens under corrosion fatigue status was determined to be 15 mN.The maximum bending loads,which were measured by fatigue tests,decrease gradually prior to final fracture.Corrosion fracture first occurs in the range of notch with a higher tensile bending stress,and exhibits clear evidence of trans-columnar fracture.The variation of maximum bending loads with time agrees with that creep deformation of the micro-sized Ni specimens can easily occur at room temperature,which implies that the micro-sized Ni specimens appear to have an improved resistance towards total crack as compared with the ordinary-sized Ni specimens.

关键词： cantilever beam corrosion fatigue nickel micro-system

作者: ZHANG Qiang GUO Xing-peng LIU Yu DAI Neng-li LU Pei-xiang

作者单位: Department of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Key L Wuhan National Laboratory for Optoelectronics,School of Optoelectronics Science and Engineering,Huaz

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）