ELASTO-PLASTIC PROPERTIES OF MO-MODIFIED TI DEDUCED FROM INDENTATION TESTS AND FINITE ELEMENT ANALYSIS

Yong Ma, Zhao Yang, Shengwang Yu, Bing Zhou, Hongjun Hei, Naiming Lin and Bin Tang
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Yong Ma: Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
Zhao Yang: Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
Shengwang Yu: Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
Bing Zhou: Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
Hongjun Hei: Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
Naiming Lin: Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
Bin Tang: Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China

Surface Review and Letters (SRL), 2019, vol. 26, issue 07, 1-11

Abstract: The aim of this paper is to establish an approach to quantitatively determine the elasto-plastic parameters of the Mo-modified Ti obtained by the plasma surface alloying technique. A micro-indentation test is conducted on the surface under 10N. Considering size effects, nanoindentation tests are conducted on the cross-section with two loads of 6 and 8mN. Assuming nanoindentation testing sublayers are homogeneous, finite element reverse analysis is adopted to determine their plastic parameters. According to the gradient distributions of the elasto-plastic parameters with depth in the Mo-modified Ti, two types of mathematical expressions are proposed. Compared with the polynomial expression, the linear simplified expression does not need the graded material to be sectioned and has practical utility in the surface treatment industry. The validation of the linear simplified expression is verified by the micro-indentation test and corresponding finite element forward analysis. This approach can assist in improving the surface treatment process of the Mo-modified Ti and further enhancing its load capacity and wear resistance.

Keywords: Mo-modified Ti; plasma surface alloying; indentation; reverse analysis; gradient (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1142/S0218625X18502256

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