Nanoindentation study of electrodeposited Ag thin coating: An inverse calculation of anisotropic elastic-plastic properties

SURFACE & COATINGS TECHNOLOGY

卷:310

Article

Cheng, Guang¹  Sun, Xin¹  Wang, Yuxin²  Tay, See Leng³  Gao, Wei³ 

[1] Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, POB 999, Richland, WA 99352 USA

[2] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Jiangsu, Peoples R China

[3] Univ Auckland, Dept Chem & Mat Engn, PB 92019, Auckland 1142, New Zealand

关键词: Nanoindentation;    Electrodeposited;    Ag coating;    Anisotropic elastic-plastic property;    FEA;   

DOI  :  10.1016/j.surfcoat.2016.12.056

来源: Elsevier

【 摘 要 】

A new inverse method was proposed to calculate the anisotropic elastic-plastic properties (flow stress) of electrodeposited Ag thin coating utilizing nanoindentation tests, previously reported inverse method for isotropic materials and three-dimensional (3-D) finite element analyses (FEA). Indentation depth was similar to 4% of coating thickness (similar to 10 mu m) to avoid substrate effect and different indentation responses were observed in the longitudinal (L) and the transverse (T) directions. The estimated elastic-plastic properties were obtained in the newly developed inverse method by matching the predicted indentation responses in the L and T directions with experimental measurements considering indentation size effect (ISE). The results were validated with tensile flow curves measured from free-standing (FS) Ag film. The current method can be utilized to characterize the an isotropic elastic-plastic properties of coatings and to provide the constitutive properties for coating performance evaluations. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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