Corrosion and fatigue testing of micro-sized 304 stainless steel specimens fabricated by femtosecond laser

J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (02): 187-193.

Corrosion and fatigue testing of micro-sized 304 stainless steel specimens fabricated by femtosecond laser

qiang zhang;Xingpeng GUO

HuaZhong University of Science and Technology

收稿日期:2007-08-20 修回日期:2008-01-18 出版日期:2009-03-28 发布日期:2009-10-10
通讯作者: qiang zhang

Corrosion and Fatigue Testing of Microsized 304 Stainless Steel Beams Fabricated by Femtosecond Laser

Qiang Zhang¹⁾ , Xingpeng Guo^1)†, Nengli Dai²⁾ and Peixiang Lu²⁾

1) Department of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2) Wuhan National Laboratory for Optoelectronics and School of Optoelectronics Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Received:2007-08-20 Revised:2008-01-18 Online:2009-03-28 Published:2009-10-10
Contact: Xingpeng Guo
Supported by:
the National Natural Science Foundation of China under grant No. 50671040.

摘要/Abstract

关键词: corrosion fatigue;304 stainless steel;femtosecond laser;micro-system

Abstract:

The 304 stainless steel (SS) microcantilever specimens with dimensions of 30 μm×30 μm×50 μm (thickness× width×length) were fabricated by femtosecond (fs) laser. The microsized cantilevers of good quality with structure and dimensions according commendably with that of the designed cantilever were obtained. The result shows that fs laser micromachining is a promising method for directly fabricating metallic microcomponents. Corrosion and fatigue properties of microsized specimens were carried out on the microsized 304 SS cantilever beams by a newly developed fatigue testing machine. The results show that the microsized 304 SS specimens appear to have an improved resistance towards localized corrosion compared to ordinary-sized 304 SS specimens after the static corrosion testing. The testing result shows that the presence of corrosive solution reduces the fatigue lifetime of the 304 SS specimen by a factor of 10-100. The maximum bending loads measured by fatigue testing machine decrease rapidly at the terminal stage of environment assisted fatigue testing. Corrosion fracture first occurred at the range of notch with a higher tensile bending stress, and exhibited clear evidence of trans-columnar fracture detected by SEM (scanning electron microscopy).

Key words: Corrosion fatigue, Stainless steel, Femtosecond laser, Microsystem

qiang zhang Xingpeng GUO. Corrosion and fatigue testing of micro-sized 304 stainless steel specimens fabricated by femtosecond laser[J]. J. Mater. Sci. Technol., 2009, 25(02): 187-193.

Qiang Zhang,Xingpeng Guo,Nengli Dai,Peixiang Lu. Corrosion and Fatigue Testing of Microsized 304 Stainless Steel Beams Fabricated by Femtosecond Laser[J]. J Mater Sci Technol, 2009, 25(02): 187-193.

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