金属基底上薄膜力学性能测试方法I:弹性膜
首发时间:2012-11-28
摘要:本文利用金属材料在往复变形过程中流变应力不变的原理,提出了通过带膜和无膜试样屈服应力和流变应力差值法测量金属基底上薄膜残余应力的方法,并用有限元模拟检验了该方法的有效性。通过实验测量了黄铜在Mattsson溶液中形成的腐蚀产物膜的残余应力,检验了所提出方法的一致性。
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A novel method to measure the mechanical properties in a corrosion film formed on metallic substrates I: Elastic film
Abstract:This paper theoretically proposed a series of formulae for a novel tensile testing method to extract the residual stress in the surface film on metallic substrates. Finite element calculations were conducted to verify the accuracy and reliability of the proposed formulae. From the tensile stress-strain curves of metallic substrates with and without a surface film, one can evaluate the residual stress in the film using these formulae. A tarnish film on a brass substrate formed after immersion in Mattsson's solution was tested to demonstrate these methods.
Keywords: Finite element method residual stress corrosion product films electrodeposition film
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